The present study investigates how the sawdust material affects the biological treatment and biological clogging in porous media.
Serial data from soil-sawdust column experiments were used to develop a model to describe the biological treatment and biological clogging processes in porous media. A model was developed simulating solute transport with biological treatment in soil-sawdust experimental columns including biological clogging processes. The transport part of the model solves the advection dispersion differential equations and the reaction part describes the heterotrophic metabolisms of several groups of bacteria. To simulate the biological clogging effects, the changes in porosity are calculated by converting biomass into volume, which directly reduces the porosity.
Developed model could be evaluated experiment results. And it is confirmed that sawdust materials could be expected as the materials which could be encouraged biological treatment and improved the hydraulic conductivity.

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.molliq.2022.121005

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jwpe.2022.103289

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.molliq.2022.120726

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jece.2022.107431

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2166/wpt.2021.091

記述言語：その他   掲載種別：研究論文（学術雑誌）  

DOI： 10.18178/IJESD.2021.12.5.1330

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2166/wst.2020.027

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ecoenv.2020.110773

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.eti.2020.100911

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jcis.2020.03.028

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.cep.2020.107879

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Promoting aqueous and transport characteristics of highly reactive nanoscale zero valent iron via different layered hydroxide coatings
In this study, nanoscale zero valent iron (Fe-0) was coated with different layered hydroxide coatings (Mg/Al/Ca(OH)(N)) to enhance its suspension stability in aqueous solution and transportability within the porous media. Morphological characteristics, crystallinity and surface elemental composition of the synthesized bare (Fe-0) and coated (C-Fe-0) were investigated using TEM, XRD and SEM-EDS analyses respectively. Suspension stability of Fe-0 and C-Fe-0 suspensions with different [Mg or Al or Ca/Fe: 0.2-1.0 wt/wt] coating ratios was investigated through several sets of 180 min settlement experiments. Moreover, packed-column experiments were conducted to evaluate the mobility of the prepared materials through porous media. Settlement results were highly consistent with mobility investigation, where C-Fe-0 [Mg/Fe](1.0 )showed the best performance in both with around 88% relative suspension efficiency and 93% penetration efficiency (5 times higher than Fe-0). A reciprocal relation was found between particle size, crystallinity and reactivity of the C-Fe-0, where the finest sizes exhibited higher crystallinity and better removal of the two targeted nutrients. Furthermore, the progressive dissolution of the Mg(OH)(2) shell compared with the other coating materials resulted in its superior prolonged reactivity. The presented C-Fe-0 could be promising towards enhanced performance of the reactive nanoparticles in the real water treatment applications.

DOI： 10.1016/j.apsusc.2019.145018

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.molliq.2019.112144

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.molliq.2019.111026

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2208/journalofjsce.7.1_30

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2208/jscejam.75.2_I_551

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.molliq.2018.12.115

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jes.2018.01.028

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1757-899X/454/1/012104

記述言語：英語  

Phosphorus Removal from Aqueous Solution by SAKURAJIMA Volcanic Ash

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s11242-018-1124-0

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jece.2018.09.012

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jwpe.2018.08.004

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jece.2018.06.069

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.cep.2018.06.020

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s12665-018-7661-6

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.seppur.2017.10.069

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1755-1315/67/1/012004

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5109/1808449

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.cej.2016.10.080

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.cej.2016.02.052

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.cej.2015.11.038

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）  

DOI： 10.4028/www.scientific.net/AMR.894.261

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s12665-012-1789-6

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apm.2011.04.040

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Kinetic Model of Arsenic Sorption onto Zero-Valent Iron (ZVI)
This study investigated the mechanisms involved in removing arsenic from water using zero-valent iron (ZVI) as sorbent. Relatively limited information is available on the kinetics aspects of sorption of arsenic compounds onto ZVI. In order to gain an understanding of the sorption kinetics, a detailed study was conducted in a controlled batch test and developed sorption kinetic model.The effects of different arsenic concentrations on the kinetics sorption rates of arsenic(V) and arsenic(III) were investigated. Arsenic(V) was removed by two mechanisms-surface adsorption and co-precipitation with Fe(III) on ZVI, while arsenic(III) was removed by adsorption on ZVI and oxidized to arsenic(V). Reaction rate constants were calculated for arsenic(V) and arsenic(III) at different concentrations by a second-order kinetic model.The results indicate that ZVI could be employed as sorbent materials to enhance the adsorption and co-precipitation processes to improve the removal rate of arsenic from water. The results also showed that the arsenic(III) oxidized to arsenic(V), while the analyses indicated that there was no measurable reduction of arsenic(V) to arsenic(III).

DOI： 10.1007/s12403-010-0030-7

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Modeling of solute transport and biological sulfate reduction using low cost electron donor
Serial data from soil-sawdust column experiments were used to develop a mathematical model to describe the biological sulfate reduction processes in porous media. The mathematical model numerically solves the equation of solute transport in one-dimensional saturated state. Solute transport is coupled to sulfate reducing bacteria sub model. Bacterial growth is assumed to follow double Monod kinetic equation. Two bacterial groups (X1 and X2) were described. Bacterial group X1 uses under aerobic conditions oxygen and under anaerobic conditions nitrate as electron acceptor. Under anaerobic conditions bacterial groups X2, use sulfate as an electron acceptor. Sulfate rich wastewater is usually deficient in electron donor and requires external addition of electron donors in order to achieve complete sulfate reduction. The organic carbon as electron donor is one of the most important factors that affect sulfate reduction bacterial activity. In this study the possible source of organic carbon is the solid organic carbon supplied to the system in the form of sawdust. The results of this study indicate that sawdust could be employed as low-cost materials to enhance the biological sulfate reduction processes in porous media. While the availability of organic carbon as electron donor is one of the most important factors that affect the sulfate reducing bacterial activity in porous media, this study demonstrates that using sawdust as a carbon source can improve the bacterial activity and increase the column permeability.

DOI： 10.1007/s00254-008-1258-4

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5917/jagh1987.50.275

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s11270-008-9731-y

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2208/prohe.51.19

記述言語：英語   掲載種別：研究論文（学術雑誌）  

開催年月日： 2012年6月

記述言語：英語   会議種別：口頭発表（一般）  

国名：アメリカ合衆国  

開催年月日： 2010年12月

記述言語：英語   会議種別：口頭発表（一般）  

国名：日本国  

開催年月日： 2021年10月

記述言語：英語  

国名：その他  

Biosorption of Arsenic from Contaminated Water: Composite of Algae and Fe-Nano Particles Arsenic poisoning has been a great concern for the last two decades because of its extensive problems. Coagulation, ion exchange, ultrafiltration, and adsorption systems have been used for the removal of arsenic from polluted water. In this study, the biosorption process was used owing to eco-friendly, simplicity, biodegradable, and cost effectiveness. The uptake of arsenic from contaminated water by Ulva lactuca, Spirulina platensis, Chlorella vulgaris, orange peel, NZVI, zeolite, and composite of NZVI and algae was studied. This study observed that Chlorella vulgaris and iron coated Chlorella vulgaris absorb arsenic more effectively than other algae and iron coated algae. After 24 hours, Chlorella vulgaris and Fe-coated Chlorella vulgaris absorbs 23% and 67% arsenic from contaminated water, respectively. The presented findings depicted the great potential of using bio-sorbents and the Fe-algae bio-composite for the removal of arsenic from contaminated aqueous solutions.

開催年月日： 2021年10月

記述言語：英語  

国名：その他  

Understanding the Effect of Fe(II) and Fe(III) in Generating Electricity from Real Waste Sludge in Microbial Fuel Cells Microbial fuel cells (MFCs) are a versatile technology for power generation from biodegradable solid wastes. This study aimed to investigate Fe(II) and Fe(III) effects on MFC's power generation and wastewater treatment performance. All MFCs were operated in a batch mode and incubated at a constant temperature (40 ℃) for 45 days of operation. The experimental procedure went through MFCs construction, collection and characterization of waste sludge samples, and bacterial growth counting. Results showed that the Fe(III) addition exhibited a higher power output by 295 % and a shorter start-up time. The microbial growth increased by 92.18 %, and the anolyte's resistivity decreased with an increase in the organic matter digestion by 52.78 %. However, the amount of power generated in these MFCs was limited by the biological Fe(III) reduction rate high enough to restrict the produced current.

開催年月日： 2021年10月

記述言語：英語  

国名：その他  

Radionuclides Removal from Aqueous Solutions: A Mini Review on Using Different Sorbents In this study, mini review is presented on the use of different sorbents for radionuclides removal of from water. Four sorbents categories were considered: carbon-based, nanomaterials, bio-sorbents, and miscellaneous sorbents. Carbon-based sorbents showed excellent removal performance towards radionuclides, owing to the high specific surface area and abundant oxygen-containing functional groups. While Fe0 and Fe0-based composites was found to exhibit rapid sorption rate, high removal capacity, and strong redox performance for radionuclides, indicating that such nanomaterials can be very promising for in-situ removal of radionuclides, once their drawbacks (aggregation and poor mobility) are overcome. The use of bio-sorbents showed high potential of such materials to remediate radioactive contaminated water under specific environmental conditions. The critical review in this study shall represent a great contribution to the potential researchers and decision makers choosing the highly efficient, feasible, and environmentally friendly sorbents for the removal of radionuclides from aqueous solutions.

開催年月日： 2021年10月

記述言語：英語  

国名：その他  

Mini Review on Recent Applications of Nanotechnology in Nutrient and Heavy Metals Removal from Contaminated Water Several toxic substances, such as nutrients, heavy metals, radionuclides, and pharmaceuticals, are continuously discharging to the environment, as a result of unaccountable industrial and agricultural activities, and contaminating huge quantities of soil and water. Nanotechnology was employed over the past years to remediate the contaminated waters and clean the environment from these pollutants to protect the life on the planet. Nanoscale zerovalent iron (nZVI) is one of the most applied nanomaterials in the field of water and wastewater treatment and it is extensively utilized to remove a wide range of contaminants from water. Thus, this mini review intends to summarize the latest applications of nZVI and its composites in eliminating several nutrients and heavy metals, namely nitrate (NO3-), phosphorous (P), chromium (Cr) and arsenic (As).

開催年月日： 2021年10月

記述言語：英語  

国名：その他  

Investigating the Effect of Commercial and Synthesized Fe^0 particles on Methane Production Through the Anaerobic Digestion of Waste Sludge Anaerobic digestion (AD) is a well-established technology that converts organic wastes to produce renewable energy as methane gas. However, the low conversion efficiency of organic matter to methane gas is the main challenge for the practical application of this technology. Therefore, this article aims to demonstrate the effect of the addition of commercial and synthesized Fe0 particles on methane gas production during the AD of waste sludge. Two set of experiments were conducted using two different waste sludges collected at different times from Fukuoka wastewater treatment plant in Japan. Different concentrations of commercial and synthesized iron particles were used in the anaerobic digesters ranged from 1 to 500 mg/L. The results should that the addition of the synthesized/Fe^0 particles to the anaerobic digesters improved methane production by 16% and 5% at using the first and second waste sludge, respectively. On the other hand, the addition of the commercial iron particles did not improve the production of methane gas.

開催年月日： 2020年10月

記述言語：英語  

国名：その他  

A Review on Water Conservation and Consumption Behavior: Leading Issues, Promoting Actions, and Managing the Policies. Securing supplies of freshwater is now a big concern for policymakers worldwide. Water saving represents significant pro-environmental behavior for a sustainable water resource. In this paper we present the determinants of conservation and use of household water to establish the relative influence of psychosocial, environmental, and demographic bases. We evaluate the predominant study on the factors influencing excessive water consumption, the various ways in which water agencies can control over-consumption, promote residential water conservation, and claim for the demand-side programs. If we maintain the positive attitude and intention toward conservation, change our daily water use behavior, build the habit to use less water as we can, involve the pro-environmental activities, and if the government properly manage the water demand of every household, this can help to conserve water for our future generation and develop the capability to better implement water conservation agendas that respond to short-term to long term water scarcity crises.

開催年月日： 2020年10月

記述言語：英語  

国名：その他  

The Involvement of Nanoscale Zero Valent Iron during the Anaerobic Digestion of Sludge Increased production of Waste Activated Sludge (WAS) calls for its proper treatment and this can be achieved by biogas production. The aim of this research was to investigate the impact of 1.5g/L NZVI on the generation of bio-methane through the Anaerobic Digestion (AD) process. The results showed that sludge with NZVI (Sg/NZVI) improved the biogas production due to its electron transfer capability. The pH decreased overtime due to the production of Volatile Fatty Acids (VFA) during the AD process, however, the pH of the control decreased more than that of Sg/NVZI because the H+ was consumed during iron corrosion thus resulting in a favorable pH for the methanogens. But with time, the accumulation of VFA and ammonia resulted in the decreased production of biogas.

開催年月日： 2020年10月

記述言語：英語  

国名：その他  

Removal of Ciprofloxacin from Aqueous Solutions by Nanoscale Zerovalent Iron-Based Materials: A Mini Review Ciprofloxacin is a fluoroquinolone antibiotic developed to fightback several bacterial diseases. The widespread application in human and animal medicine and the low biodegradation resulted in the persistent detection of ciprofloxacin in many water systems. The occurrence of ciprofloxacin threats human and aquatic life by motivating the development of antimicrobial resistant geneses in water. Microscale (ZVI) and nanoscale zerovalent iron (nZVI) were used to efficiently remove ciprofloxacin from aqueous solutions. The aim of this mini review to summarize: (1) the possible routes for ciprofloxacin to enter the environment, (2) the mechanism of oxidizing organic pollutants by nanoscale zerovalent iron (nZVI), (3) the ways to improve the performance of nZVI and overcome its limitations and finally (4) the available treatment systems in the literature which is developed based on NZVI to remove ciprofloxacin from aqueous environments.

開催年月日： 2020年10月

記述言語：英語  

国名：その他  

Numerical Analysis on Turbulence and Air-Water Scalar Transport in Open-Channel Flow Influenced by Thermal Stratification and Surface Shear Stress It is important for estimating accurately the air-water transport of scalar such as heat and gas to understand turbulent characteristics close to the water surface. Near-surface turbulence in natural hydro-environments is influenced by the thermal stratification and the wind shear stress acting on the water surface. The purpose of this study is to numerically investigate how their factors influence the turbulent structure and the air-water scalar transport in an open channel flow by means of the direct numerical simulation, i.e., DNS. We reproduce the combined effects of the thermal stratification and the surface shear stress on the structure of the turbulent flow and the scalar transport on the water surface. The numerical results suggest that the scalar transport velocity is obviously changed by the combined effects of the thermal stratification and the surface shear stress.

開催年月日： 2020年10月

記述言語：英語  

国名：その他  

Innovative Biotechnological Applications of Galdieria Sulphuraria-Red Microalgae (GS-RMA) in Water Treatment Systems In this study, mini review is introduced on the features of the red microalgae (RMA) and its biotechnological potential in different applications. Since it has unique extremophilic features, Galdieria Sulphuraria (GS) is considered to be a perfect microorganism candidate for various biotechnological applications in water treatment systems. Special interest has been oriented towards the applications of GS in water treatment systems, such as nutrients, biological oxygen demand (BOD) and heavy metals (HMs) removal from wastewater. Also, different future prospects have been suggested in terms of the new and innovative applications of GS in water treatment based on the gaps in the literature, including phycoremediation of HMs, bio-resin production, bio-substrate for nanoparticles, and pharmaceuticals removal from wastewater. Finally, the challenges and limitations of employing GS in biotechnological applications have been reviewed, which revealed that using GS has a great potential in largescale outdoor cultivation without becoming contaminated with other microorganisms.

開催年月日： 2020年10月

記述言語：英語  

国名：その他  

Enhancement of Power Generation in Microbial Fuel Cells (Mfcs) Using Iron/Copper Nanoparticles In this study, a lab-scale microbial fuel cell (MFC) was constructed and power generation output was investigated for 45 days of operation. Nanoscale zerovalent iron (NZVI) and Iron/copper nanoparticles (Cu/NZVI) were added to the anode chamber of the MFC with a concentration of 10 mg/L and their effects were investigated on the MFC performance. Results showed that the maximal power output density values increased by 43.33 % using copper/iron nanoparticles compared to the control MFC. Anode chamber was examined, and results proved that conductivity increased by 13.68% and 23.62% using NZVI and Cu/NZVI, respectively. The chemical oxygen demand COD was tested, and the removal efficiency reached 38.88%, 38.26%, and 52.40% for control, NZVI, and Cu/NZVI MFCs, respectively after 45 days of operation. This study highlights the effect of nanoparticles technology on power generation from activated sludge using microbial fuel cells (MFCs).

開催年月日： 2020年10月

記述言語：英語  

国名：その他  

Comparative Study of Bare and Emulsified Nanoscale Zero-valent Iron for Nitrate and Phosphorus Removal This work aims to demonstrate the effect of polyethylene sorbitan monolaurate (PSM) on the properties and reactivity of nanoscale zero-valent iron (nZVI). PSM was used in this work to prepare an emulsified nZVI to overcome the particle aggregation phenomenon of nZVI and show the prepared particles with good properties. For that purpose, TEM, XRD and reactivity test of nitrate and phosphorus were performed to show the changes in the performance of nZVI after being emulsified with PSM. The results showed that the emulsified (PSM) greatly improved the removal efficiency of nitrate. Moreover, PSM enhanced the particle dispersion of nZVI and showed the particles with good properties.The results showed that the emulsified nZVI with PSM was also suitable for reduction of nitrate even at a wide range of pH. This study proposed that the emulsified nZVI could have a significant contribution in the aspects of water treatment only for the reducible contaminates.

開催年月日： 2019年10月

記述言語：英語  

国名：その他  

Analogy of iron-copper and iron-silver bimetals during the corrosion process Because of their strong magnetic properties, the Fe based nanomaterials have successfully been used in order to remediate environmental contamination. The synthesis of the bimetallic nanoparticles was done following chemical reduction of ferric chloride with sodium borohydride then deposition of the respective bimetal. This study was conducted to determine the concentration influence on the dissolution of iron in the presence of the bimetallic nanoparticles along with determining the role of FeCu and FeAg bimetals during iron corrosion. The results showed that the higher the dosage, the higher the iron dissolution due to increased surface area hence reactivity. Also, the bimetals improved the reactivity of iron.

開催年月日： 2019年10月

記述言語：英語  

国名：その他  

Upgrading of Aerobic Sequencing Batch Reactor System with Adding Nanoscale Zero Valent Iron for Wastewater Treatment The aim of this study was to investigate the effect of nano-scale zero-valent iron (nZVI) on the performance of aerobic sequencing batch reactors (SBRs) in terms of COD, phosphate removal and microbial species growth. Two lab scale SBRs were operated simultaneously for sixty days with and without adding nZVI. The reactors were fed with synthetic wastewater and acclimated with seed sludge which was taken from a full-scale municipal wastewater treatment plant in Istanbul. As a result, next generation sequencing technology analysis confirmed that the addition of nZVI in R2 promoted some bacterial types such as Xanthomonadales and inhibited others such as Clostridiales, confirming that the effect of nZVI on the bacterial growth was genera dependent. In addition, the phosphate and COD were completely removed at the end of the study and slightly enhanced with 15 % after the addition of nZVI in R2.

開催年月日： 2019年10月

記述言語：英語  

国名：その他  

Factorial Experimental Design for Optimization of Cesium Removal from Aqueous Solutions The effective removal of cesium from aqueous solution is an emerging issue all over the world particularly in Japan after destroyed Daiichi nuclear power plant of Fukushima. To reduce the expended chemicals and reagents in experimental work and number of the experiment, it is required to implement statistical optimization of the factors for the cesium removal process. In this study, factorial experimental design and multivariate regression technique were employed to evaluate the main effects and interactions among the pH, initial concentration and contact time in the cesium removal process using nZVI-Z as an adsorbent. The study revealed that maximum cesium removal occurred at pH level 6, initial concentration of 200 mg/L and contact time of 30 minutes. Initial concentration was the statistically significant factor followed by contact time. Moreover, the significant interaction effect was observed between contact time and initial concentration.

開催年月日： 2019年10月

記述言語：英語  

国名：その他  

Effect of Nano Zero Valent Iron Delivery Method into Porous Media on Phosphorus Removal from Groundwater The main aim of this study is to investigate the effect of the delivery method of nano zero valent iron (NZVI) into porous media on the removal of phosphorus from groundwater. Different column experiments were conducted considering injection and permeable reactive barrier (PRB) approaches using sand-packed column with 65 cm length and 10 cm inner diameter. Results revealed that Injecting 10 g of NZVI into C4 resulted in the highest sorption capacity and average removal efficiency of 25 mg/L phosphorus concentration over 14 days with 197.76 mg-P/g-NZVI and 84.8% respectively. The dissolved oxygen levels in the effluent samples of the NZVI column were declined due to the oxidation process of NZVI, which was accompanied by a lower ORP values. The change of the delivery methodology of NZVI into porous media affected its capacity to remove phosphorus, revealing that injection could be better than PRB in terms of the reactive performance.

開催年月日： 2019年10月

記述言語：英語  

国名：その他  

Effect of Bimetallic Zero Valent Iron Nanoparticles Ag/NZVI on Bacterial Growth In this study, a 13-day operation was conducted in order to investigate the effect of Ag-Fe nanoparticles on bacterial growth. To do so, three samples (S1, S2, S3) made of freshly domestic wastewater were treated under anaerobic conditions. S1 was considered as the control batch while 50mg/L of zero valent iron nanoparticles (NZVI) and Ag-Fe bimetallic nanoparticles were added to S2 and S3, respectively. Results showed that the addition of NZVI was effective in activating the bacterial growth. However, Ag-Fe nanoparticles inhibited the bacterial growth. A comparison of the chemical oxygen demand COD of the three samples confirmed the obtained results.

開催年月日： 2018年10月

記述言語：英語  

国名：その他  

Enhancement of Nanoscale Zero-Valent Iron Stability in Aqueous Solution Via Metal Hydroxide Coating Concerns have been increased regarding the behavior of nanoscale zero-valent iron (nZVI) in subsurface environmental remediation applications. In this study, the iron particles were coated by magnesium hydroxide (Mg(OH)_2) shell in order to improve their suspension stability in aqueous solutions. Sedimentation tests were conducted for different ratios of the coating material to evaluate the enhancement of particles stability and to determine the optimum coating ratio. Results of sedimentation tests showed that, the coated iron particles Mg(OH)_2-CnZVI exhibited better stability performance than that of bare nZVI (BnZVI). Additionally, optical absorbance results depicted that Mg/Fe coating ratios of 0.8 and 1 showed less aggregation potential than that of the other coating ratios and BnZVI as well. Moreover, beside the enhanced stability, the addition of the nonmagnetic coating layer protected the nZVI core from the rapid corrosion. Further studies should be conducted to investigate the sustainability of the coated nZVI reactivity.

開催年月日： 2018年10月

記述言語：英語  

国名：その他  

nZVI@TiO_2 Hetero-interface Activity for NO_3- Removal as Water Remediation Application Interface has a synergetic effect in catalytic reactions. Nano particle zero Valent iron (nZVI) is high active (Oxidant, Reductant) of almost contaminants of wastewater such like nitrate through reduction as part of water remediation. nZVI agglomeration lead to severely decreasing in surface area then hence drop in its activity. There were some additives served as anti-agglomeration such like polymers, bi-metals and stabilizers. However, metal oxide nanostructure could prohibit nZVI agglomeration furthermore create an interface with higher activity. TiO_2 as a photocatalytic material has same function after excitation with suitable energy. Electrons play main role for reduction while holes are for oxidation, and hence its efficiency depend on mainly in time recombination of electrons and holes. nZVI@TiO_2 successfully synthesized and demonstrated synergetic reduction removal activity for NO_3-. SEM have been used to analysis new composite structure, furthermore several batch experiments have been performed to suggest reduction possible scenario including future plan.

開催年月日： 2018年10月

記述言語：英語  

国名：その他  

Removal of boron from aqueous solutions using MgAl composition Although boron is an element of requirement for the growth of plants, animals and humans, environmental issues and health hazards are related to boron applications in various industries. Recently many techniques have been developed to remove boron from aqueous solutions; adsorption proved to be capable to treat solutions with low boron concentrations. Mg-Al bimetallic compound was synthesized and calcined. Then, was tested in a process to remove boron from aqueous solutions. Difference between calcined and non-calcined Mg-Al bimetallic compounds in removing boron from aqueous solutions were measured to determine whether the calcination process is of significant benefit. Experiments were conducted with variety of pH levels, temperatures dosage volume as well as initial boron concentration; thus finding the most suitable factors in the removing of boron in aqueous solutions using Mg-Al bimetallic compound.

開催年月日： 2018年10月

記述言語：英語  

国名：その他  

Phosphorus Removal by using Nano-scale Iron Materials Nano-scale Zero Valent Iron (NZVI) was used to remove phosphorus from aqueous solution, and the influence of oxygen and pH were investigated. The higher removal efficiency was obtained from oxic condition. It is because that generated Fe^<2+> and Fe^<3+> will be formed oxide layer on the surface of NZVI which become good adsorbate. And the removal of phosphorus obviously increased when the solution pH was decreased to the acidic side due to the isoelectric point of NZVI. The higher removal efficiency was obtained under oxic and acidic pH condition. According to these results, NZVI was a optimum and useful material for removing phosphorus.

開催年月日： 2018年10月

記述言語：英語  

国名：その他  

Nano-Fe/Cu particles for the remediation of cesium contaminated solutions The great East Japan Earthquake in 2011 triggered the Fukushima Daiichi nuclear power plant accident. Large amount of cesium was released into the environment following this severe accident. Therefore, this research work evaluated the applicability of nano-Fe/Cu particles for the removal of cesium from contaminated waters for the first time. Cesium removal was investigated using batch technique with respect to initial cesium concentration, contact time, temperature, pH, competing cations and dosage of nanoparticles. The results showed that nano-Fe/Cu particles demonstrated effective performance for removal of cesium. The removal efficiency exceeded 99% at initial cesium concentration of 1 mg/L and 1 g/L dose. The removal of cesium was largely depending on the solution pH and temperature. The current study proved the potential utility of the nano-Fe/Cu particles as a promising adsorbent for the treatment of waters containing cesium.

開催年月日： 2018年10月

記述言語：英語  

国名：その他  

Inspection of Iron-Copper Bimetal Performance in Chemically Altered Atmosphere The reactivity of Nanoscale Zerovalent Iron (nZVI) can be enhanced by addition of the second metal to increase surface area. In this research, the influence of pH and oxygen supply on Fe-Cu bimetallic nanoparticles' reactivity was investigated. Fe-Cu nanoparticles were synthesized through ferric chloride reduction by sodium borohydride followed by deposition of Cu metal. Iron dissolution was enhanced in acidic pH due to the presence of H+ ions which make the surface to be positively charged whereas in alkaline pH, the OH- ions contribute to the passive layer formation thus limiting further oxidation. Continuous supply led to higher Fe-Cu corrosion as opposed to limited oxygen supply since oxygen enhanced oxidation. The significance of this study is to make deductions in contaminant remediation technologies.

開催年月日： 2018年10月

記述言語：英語  

国名：その他  

Enhancement of the Reduction and Adsorption Mechanism of nZVI using an effective polyacrylamide as a nonionic polymer Nano Scale Zero Valent Iron (nZVI) has been considered as an effective material for contaminated water cleanup due to the large surface area and its high reducing power. However, due to its high magnetic force, the particles tend to form aggregates resulted in decreasing its high surface area. To overcome the aggregates problem and increase the particle's surface area, polyacrylamide has been used as an effective polymer for synthesizing a stabilized nZVI particles. Comparing with non-stabilized nZVI, the polyacrylamide stabilized nZVI exhibited an excellent performance for both of the nitrate reduction and phosphorus adsorption. Different polyacrylamide dosages varied between 0.2 to 2 (g/L) were investigated, a dose of 0.6 (g/L) was the optimum ratio of polyacrylamide to nZVI to achieve the highest removal efficiency for both of phosphorus and nitrate removal. The polyacrylamide stabilized nZVI improved the nitrate and phosphorus removal efficiency by 43.6 and 21.9% respectively with respect to non-stabilized nZVI.The polyacrylamide was proposed as an effective polymer for enhancing the nZVI particles reactivity to treat the nitrate and phosphorus in the contaminated water.Nano Scale Zero Valent Iron (nZVI) has been considered as an effective material for contaminated water cleanup due to the large surface area and its high reducing power. However, due to its high magnetic force, the particles tend to form aggregates resulted in decreasing its high surface area. To overcome the aggregates problem and increase the particle's surface area, polyacrylamide has been used as an effective polymer for synthesizing a stabilized nZVI particles. Comparing with non-stabilized nZVI, the polyacrylamide stabilized nZVI exhibited an excellent performance for both of the nitrate reduction and phosphorus adsorption. Different polyacrylamide dosages varied between 0.2 to 2 (g/L) were investigated, a dose of 0.6 (g/L) was the optimum ratio of polyacrylamide to nZVI to achieve the highest removal efficiency for both of phosphorus and nitrate removal. The polyacrylamide stabilized nZVI improved the nitrate and phosphorus removal efficiency by 43.6 and 21.9% respectively with respect to non-stabilized nZVI.The polyacrylamide was proposed as an effective polymer for enhancing the nZVI particles reactivity to treat the nitrate and phosphorus in the contaminated water.

開催年月日： 2017年10月

記述言語：英語  

国名：その他  

Continuous-flow of Nanoscale Zero Valent Iron based system for phosphorus removal In this study, the removal performance of NZVI for phosphorus under different five condition such as 1) open (with Polishing Unit (1a) and without one (1b)), 2) full aerobic (air flow=1.2L/min. (2a) and 1L/min. (2b)) and 3) full anaerobic conditions (nitrogen flow=3L/min) were analyzed. The initial phosphorus concentration and feeding rate were maintained each approximately 25 mg P/L and 20 ml/min. In each condition, the reactor phosphorus removal rates for initial 3 hours were 77.6 ± 10.2% (1a), 96.3 ± 1.7% (1b), 95.6 ± 1.4% (2a), 95.5 ± 2.3% (2b) and 96.8 ± 2.0% (3). From these results, there are no big differences between them. However, all of the rates decreased to about 50 to 80% after 12 hours. The effluent total iron concentration from the reactor was also analyzed and the correlation with the effluent phosphorus concentration was calculated. As a result, correlation coefficient was R^2=0.963 (2a), R^2=0.897(2b), R^2=0.885(3) respectively, and it was confirmed that there is positive correlation.

開催年月日： 2017年10月

記述言語：英語  

国名：その他  

Potential catalytic effect of ion copper bimetallic nanoparticles on digestion of anaerobic activated sludge at high iron concentrations Throughout this research, prepared zero valent iron copper nanoparticles (Fe^0/Cu) was used in order to investigate the methane generation and the degradation of anaerobic activated sludge. The prepared Fe^0/Cu in different high concentrations (0.5, 1.5 and 3 g/L) were added to laboratory scale bioreactors to check its biogas generation efficiency compared with blank bioreactor. Furthermore, the organic matter degradation process was also studied by profiling the soluble chemical oxygen demand (SCOD). The results show that the Fe^0/Cu bimetallic particles facilitate the catalytic reactivity by increasing the generated biogas volume and methane yield. The total generated biogas increased by 235.6% for the bioreactors exposed with 1.5 g/L of Fe^0/Cu particles compared with blank. Collectively, results suggest that Fe^0/Cu was promising remediation of domestic activated sludge and consequently Fe^0/Cu system can be proposed as a cost-effective addition for the anaerobic digesters.

開催年月日： 2017年10月

記述言語：英語  

国名：その他  

Nitrate Removal in Porous Media Using Nanoscale Zero Valent Iron: Column Experiment The use of nanoscale zero valent iron (nZVI) as a reactive media in porous media has become a promising technology for contaminants removal from soil and groundwater. Therefore, the main aim of current work is to investigate nitrate removal from water using nZVI in an upflow packed sand column. The effects of one layer, multilayer and different thicknesses of nZVI/sand on nitrate removal were reported in this study. The initial nitrate concentration was 200 mg/L. The distribution of nitrate trapped inside the columns was evaluated by measuring nitrate concentration at various intermediate sampling points along the depth of the column in addition to the column outlet. The results indicated that the best condition to remove nitrate was observed when using single 10-cm high layer of nZVI/sand and more than 97% of influent nitrate was removed.

開催年月日： 2017年10月

記述言語：英語  

国名：その他  

Investigation on Nanoscale Zero Valent Iron interactions in aqueous solution Nanoscale Zero Valent Iron (NZVI) is a waste water treatment approach that is currently gaining attention due to its high efficiency on removal of various water contaminants. To understand its chemical reaction mechanisms, NZVI interactions in aqueous solution free from contaminants were investigated in this study. Several batch experiments were conducted to determine the effect of pH, temperature and dissolved oxygen on ferrous and ferric concentrations. Results showed that the elution of iron ion occurred fast in the first 10 minutes followed by an obvious depletion in concentration due to iron precipitation, and then remained constant. The concentration of ferric was higher than that of ferrous in both oxic and anoxic conditions. Acidic condition enhanced the amount of iron elution because it provided H+ to promote the iron elution reaction forward. The highest temperature of 90℃ condition gave highest iron concentration. However, among lower temperatures, relatively lower temperature gave higher iron concentration. These results are useful for the NZVI application on water treatment in a large scale.

開催年月日： 2017年10月

記述言語：英語  

国名：その他  

Integrating nano-scale zero valent iron (nZVI) in phosphorus removal from aqueous solution through porous media: packed-column experiment

開催年月日： 2017年10月

記述言語：英語  

国名：その他  

Effects of sodium borohydride as a reductant on the synthesis conditions of Nano-scale Zero Valent Iron

開催年月日： 2016年10月

記述言語：英語  

国名：その他  

Investigation of Contaminants Interference on Water Treatment by Supported Nanoscale Zero Valent Iron

開催年月日： 2015年10月

記述言語：英語  

国名：その他  

DIFFERENT NANOSCALE ZERO VALENT IRONS FOR NITRATE-POLLUTED WATER REMEDIATION In this study, four nanoscale zero valent iron (NZVI) types were characterized and compared for nitrate removal from water. Through batch experiments, it was observed that old-purchased iron (OP-NZVI) had very low nitrate removal efficiency (10%) for more than 8 hours. Treated iron (T-NZVI) removed approximately half of nitrate concentration within 3 hours. Synthesized iron (S-NZVI) successfully reduced the whole amount of nitrate in one hour. Meanwhile, the improved iron (I-NZVI) removed the same amount within 20 minutes, which indicated the highest performance among other NZVIs

開催年月日： 2007年2月

記述言語：英語  

国名：その他  

MODELING OF BIOLOGICALLY MEDIATED REDOX PROCESSES USING SAWDUST AS A MATRIX A model simulating reactive transport in natural filter using sawdust as materials to improve the efficiency of filter is developed. The transport part of the model computes the changed in concentration over time caused by the processes of advection and dispersion. The kinetic sub model describes the heterotrophic metabolisms of several groups of bacteria. To model a complete redox sequence (aerobic oxidation, denitrification, Mn (IV) -reduction, Fe (III) -reduction and sulfate reduction) four functional bacterial groups (X1, X2, X3 and X4) are defined. The growth and metabolisms are formulated using the Double Monod kinetic equation. The model takes into account the exchange between the different phases (mobile phase, bio phase and matrix phase). The results from a laboratory soil-sawdust columns experiments are used to verify the simulation results of the model. While the availability of organic carbon is one of the most important factors that affects bacterial activity in natural filter. This study demonstrates that using sawdust as a carbon source can improve the biologically mediated redox processes.

記述言語：英語  

国名：その他  

Recent Activities of International Education in IGSES at Kyushu University

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

DIFFERENT NANOSCALE ZERO VALENT IRONS FOR NITRATE-POLLUTED WATER REMEDIATION In this study, four nanoscale zero valent iron (NZVI) types were characterized and compared for nitrate removal from water. Through batch experiments, it was observed that old-purchased iron (OP-NZVI) had very low nitrate removal efficiency (10%) for more than 8 hours. Treated iron (T-NZVI) removed approximately half of nitrate concentration within 3 hours. Synthesized iron (S-NZVI) successfully reduced the whole amount of nitrate in one hour. Meanwhile, the improved iron (I-NZVI) removed the same amount within 20 minutes, which indicated the highest performance among other NZVIs

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

Investigation of Contaminants Interference on Water Treatment by Supported Nanoscale Zero Valent Iron

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

Potential catalytic effect of ion copper bimetallic nanoparticles on digestion of anaerobic activated sludge at high iron concentrations Throughout this research, prepared zero valent iron copper nanoparticles (Fe^0/Cu) was used in order to investigate the methane generation and the degradation of anaerobic activated sludge. The prepared Fe^0/Cu in different high concentrations (0.5, 1.5 and 3 g/L) were added to laboratory scale bioreactors to check its biogas generation efficiency compared with blank bioreactor. Furthermore, the organic matter degradation process was also studied by profiling the soluble chemical oxygen demand (SCOD). The results show that the Fe^0/Cu bimetallic particles facilitate the catalytic reactivity by increasing the generated biogas volume and methane yield. The total generated biogas increased by 235.6% for the bioreactors exposed with 1.5 g/L of Fe^0/Cu particles compared with blank. Collectively, results suggest that Fe^0/Cu was promising remediation of domestic activated sludge and consequently Fe^0/Cu system can be proposed as a cost-effective addition for the anaerobic digesters.

記述言語：英語  

国名：日本国  

Nitrate Removal in Porous Media Using Nanoscale Zero Valent Iron: Column Experiment The use of nanoscale zero valent iron (nZVI) as a reactive media in porous media has become a promising technology for contaminants removal from soil and groundwater. Therefore, the main aim of current work is to investigate nitrate removal from water using nZVI in an upflow packed sand column. The effects of one layer, multilayer and different thicknesses of nZVI/sand on nitrate removal were reported in this study. The initial nitrate concentration was 200 mg/L. The distribution of nitrate trapped inside the columns was evaluated by measuring nitrate concentration at various intermediate sampling points along the depth of the column in addition to the column outlet. The results indicated that the best condition to remove nitrate was observed when using single 10-cm high layer of nZVI/sand and more than 97% of influent nitrate was removed.

記述言語：英語  

国名：日本国  

Investigation on Nanoscale Zero Valent Iron interactions in aqueous solution Nanoscale Zero Valent Iron (NZVI) is a waste water treatment approach that is currently gaining attention due to its high efficiency on removal of various water contaminants. To understand its chemical reaction mechanisms, NZVI interactions in aqueous solution free from contaminants were investigated in this study. Several batch experiments were conducted to determine the effect of pH, temperature and dissolved oxygen on ferrous and ferric concentrations. Results showed that the elution of iron ion occurred fast in the first 10 minutes followed by an obvious depletion in concentration due to iron precipitation, and then remained constant. The concentration of ferric was higher than that of ferrous in both oxic and anoxic conditions. Acidic condition enhanced the amount of iron elution because it provided H+ to promote the iron elution reaction forward. The highest temperature of 90℃ condition gave highest iron concentration. However, among lower temperatures, relatively lower temperature gave higher iron concentration. These results are useful for the NZVI application on water treatment in a large scale.

記述言語：英語  

国名：日本国  

Integrating nano-scale zero valent iron (nZVI) in phosphorus removal from aqueous solution through porous media: packed-column experiment

記述言語：英語  

国名：日本国  

Effects of sodium borohydride as a reductant on the synthesis conditions of Nano-scale Zero Valent Iron

記述言語：英語  

国名：日本国  

Continuous-flow of Nanoscale Zero Valent Iron based system for phosphorus removal In this study, the removal performance of NZVI for phosphorus under different five condition such as 1) open (with Polishing Unit (1a) and without one (1b)), 2) full aerobic (air flow=1.2L/min. (2a) and 1L/min. (2b)) and 3) full anaerobic conditions (nitrogen flow=3L/min) were analyzed. The initial phosphorus concentration and feeding rate were maintained each approximately 25 mg P/L and 20 ml/min. In each condition, the reactor phosphorus removal rates for initial 3 hours were 77.6 ± 10.2% (1a), 96.3 ± 1.7% (1b), 95.6 ± 1.4% (2a), 95.5 ± 2.3% (2b) and 96.8 ± 2.0% (3). From these results, there are no big differences between them. However, all of the rates decreased to about 50 to 80% after 12 hours. The effluent total iron concentration from the reactor was also analyzed and the correlation with the effluent phosphorus concentration was calculated. As a result, correlation coefficient was R^2=0.963 (2a), R^2=0.897(2b), R^2=0.885(3) respectively, and it was confirmed that there is positive correlation.

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

nZVI@TiO_2 Hetero-interface Activity for NO_3- Removal as Water Remediation Application Interface has a synergetic effect in catalytic reactions. Nano particle zero Valent iron (nZVI) is high active (Oxidant, Reductant) of almost contaminants of wastewater such like nitrate through reduction as part of water remediation. nZVI agglomeration lead to severely decreasing in surface area then hence drop in its activity. There were some additives served as anti-agglomeration such like polymers, bi-metals and stabilizers. However, metal oxide nanostructure could prohibit nZVI agglomeration furthermore create an interface with higher activity. TiO_2 as a photocatalytic material has same function after excitation with suitable energy. Electrons play main role for reduction while holes are for oxidation, and hence its efficiency depend on mainly in time recombination of electrons and holes. nZVI@TiO_2 successfully synthesized and demonstrated synergetic reduction removal activity for NO_3-. SEM have been used to analysis new composite structure, furthermore several batch experiments have been performed to suggest reduction possible scenario including future plan.

記述言語：英語  

国名：日本国  

Removal of boron from aqueous solutions using MgAl composition Although boron is an element of requirement for the growth of plants, animals and humans, environmental issues and health hazards are related to boron applications in various industries. Recently many techniques have been developed to remove boron from aqueous solutions; adsorption proved to be capable to treat solutions with low boron concentrations. Mg-Al bimetallic compound was synthesized and calcined. Then, was tested in a process to remove boron from aqueous solutions. Difference between calcined and non-calcined Mg-Al bimetallic compounds in removing boron from aqueous solutions were measured to determine whether the calcination process is of significant benefit. Experiments were conducted with variety of pH levels, temperatures dosage volume as well as initial boron concentration; thus finding the most suitable factors in the removing of boron in aqueous solutions using Mg-Al bimetallic compound.

記述言語：英語  

国名：日本国  

Phosphorus Removal by using Nano-scale Iron Materials Nano-scale Zero Valent Iron (NZVI) was used to remove phosphorus from aqueous solution, and the influence of oxygen and pH were investigated. The higher removal efficiency was obtained from oxic condition. It is because that generated Fe^<2+> and Fe^<3+> will be formed oxide layer on the surface of NZVI which become good adsorbate. And the removal of phosphorus obviously increased when the solution pH was decreased to the acidic side due to the isoelectric point of NZVI. The higher removal efficiency was obtained under oxic and acidic pH condition. According to these results, NZVI was a optimum and useful material for removing phosphorus.

記述言語：英語  

国名：日本国  

Nanoscale Zero Valent Iron (NZVI)-Based Bimetallic for Water Treatment

記述言語：英語  

国名：日本国  

Nano-Fe/Cu particles for the remediation of cesium contaminated solutions The great East Japan Earthquake in 2011 triggered the Fukushima Daiichi nuclear power plant accident. Large amount of cesium was released into the environment following this severe accident. Therefore, this research work evaluated the applicability of nano-Fe/Cu particles for the removal of cesium from contaminated waters for the first time. Cesium removal was investigated using batch technique with respect to initial cesium concentration, contact time, temperature, pH, competing cations and dosage of nanoparticles. The results showed that nano-Fe/Cu particles demonstrated effective performance for removal of cesium. The removal efficiency exceeded 99% at initial cesium concentration of 1 mg/L and 1 g/L dose. The removal of cesium was largely depending on the solution pH and temperature. The current study proved the potential utility of the nano-Fe/Cu particles as a promising adsorbent for the treatment of waters containing cesium.

記述言語：英語  

国名：日本国  

Inspection of Iron-Copper Bimetal Performance in Chemically Altered Atmosphere The reactivity of Nanoscale Zerovalent Iron (nZVI) can be enhanced by addition of the second metal to increase surface area. In this research, the influence of pH and oxygen supply on Fe-Cu bimetallic nanoparticles' reactivity was investigated. Fe-Cu nanoparticles were synthesized through ferric chloride reduction by sodium borohydride followed by deposition of Cu metal. Iron dissolution was enhanced in acidic pH due to the presence of H+ ions which make the surface to be positively charged whereas in alkaline pH, the OH- ions contribute to the passive layer formation thus limiting further oxidation. Continuous supply led to higher Fe-Cu corrosion as opposed to limited oxygen supply since oxygen enhanced oxidation. The significance of this study is to make deductions in contaminant remediation technologies.

記述言語：英語  

国名：日本国  

Enhancement of the Reduction and Adsorption Mechanism of nZVI using an effective polyacrylamide as a nonionic polymer Nano Scale Zero Valent Iron (nZVI) has been considered as an effective material for contaminated water cleanup due to the large surface area and its high reducing power. However, due to its high magnetic force, the particles tend to form aggregates resulted in decreasing its high surface area. To overcome the aggregates problem and increase the particle's surface area, polyacrylamide has been used as an effective polymer for synthesizing a stabilized nZVI particles. Comparing with non-stabilized nZVI, the polyacrylamide stabilized nZVI exhibited an excellent performance for both of the nitrate reduction and phosphorus adsorption. Different polyacrylamide dosages varied between 0.2 to 2 (g/L) were investigated, a dose of 0.6 (g/L) was the optimum ratio of polyacrylamide to nZVI to achieve the highest removal efficiency for both of phosphorus and nitrate removal. The polyacrylamide stabilized nZVI improved the nitrate and phosphorus removal efficiency by 43.6 and 21.9% respectively with respect to non-stabilized nZVI.The polyacrylamide was proposed as an effective polymer for enhancing the nZVI particles reactivity to treat the nitrate and phosphorus in the contaminated water.Nano Scale Zero Valent Iron (nZVI) has been considered as an effective material for contaminated water cleanup due to the large surface area and its high reducing power. However, due to its high magnetic force, the particles tend to form aggregates resulted in decreasing its high surface area. To overcome the aggregates problem and increase the particle's surface area, polyacrylamide has been used as an effective polymer for synthesizing a stabilized nZVI particles. Comparing with non-stabilized nZVI, the polyacrylamide stabilized nZVI exhibited an excellent performance for both of the nitrate reduction and phosphorus adsorption. Different polyacrylamide dosages varied between 0.2 to 2 (g/L) were investigated, a dose of 0.6 (g/L) was the optimum ratio of polyacrylamide to nZVI to achieve the highest removal efficiency for both of phosphorus and nitrate removal. The polyacrylamide stabilized nZVI improved the nitrate and phosphorus removal efficiency by 43.6 and 21.9% respectively with respect to non-stabilized nZVI.The polyacrylamide was proposed as an effective polymer for enhancing the nZVI particles reactivity to treat the nitrate and phosphorus in the contaminated water.

記述言語：英語  

国名：日本国  

Enhancement of Nanoscale Zero-Valent Iron Stability in Aqueous Solution Via Metal Hydroxide Coating Concerns have been increased regarding the behavior of nanoscale zero-valent iron (nZVI) in subsurface environmental remediation applications. In this study, the iron particles were coated by magnesium hydroxide (Mg(OH)_2) shell in order to improve their suspension stability in aqueous solutions. Sedimentation tests were conducted for different ratios of the coating material to evaluate the enhancement of particles stability and to determine the optimum coating ratio. Results of sedimentation tests showed that, the coated iron particles Mg(OH)_2-CnZVI exhibited better stability performance than that of bare nZVI (BnZVI). Additionally, optical absorbance results depicted that Mg/Fe coating ratios of 0.8 and 1 showed less aggregation potential than that of the other coating ratios and BnZVI as well. Moreover, beside the enhanced stability, the addition of the nonmagnetic coating layer protected the nZVI core from the rapid corrosion. Further studies should be conducted to investigate the sustainability of the coated nZVI reactivity.

記述言語：英語  

国名：その他  

Nanoscale Zero Valent Iron (NZVI)-Based Bimetallic for Water Treatment

記述言語：英語  

国名：その他  

International Postgraduate Program in Japan: Challenges and Opportunities

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

記述言語：英語  

国名：日本国  

Upgrading of Aerobic Sequencing Batch Reactor System with Adding Nanoscale Zero Valent Iron for Wastewater Treatment The aim of this study was to investigate the effect of nano-scale zero-valent iron (nZVI) on the performance of aerobic sequencing batch reactors (SBRs) in terms of COD, phosphate removal and microbial species growth. Two lab scale SBRs were operated simultaneously for sixty days with and without adding nZVI. The reactors were fed with synthetic wastewater and acclimated with seed sludge which was taken from a full-scale municipal wastewater treatment plant in Istanbul. As a result, next generation sequencing technology analysis confirmed that the addition of nZVI in R2 promoted some bacterial types such as Xanthomonadales and inhibited others such as Clostridiales, confirming that the effect of nZVI on the bacterial growth was genera dependent. In addition, the phosphate and COD were completely removed at the end of the study and slightly enhanced with 15 % after the addition of nZVI in R2.

記述言語：英語  

国名：日本国  

Factorial Experimental Design for Optimization of Cesium Removal from Aqueous Solutions The effective removal of cesium from aqueous solution is an emerging issue all over the world particularly in Japan after destroyed Daiichi nuclear power plant of Fukushima. To reduce the expended chemicals and reagents in experimental work and number of the experiment, it is required to implement statistical optimization of the factors for the cesium removal process. In this study, factorial experimental design and multivariate regression technique were employed to evaluate the main effects and interactions among the pH, initial concentration and contact time in the cesium removal process using nZVI-Z as an adsorbent. The study revealed that maximum cesium removal occurred at pH level 6, initial concentration of 200 mg/L and contact time of 30 minutes. Initial concentration was the statistically significant factor followed by contact time. Moreover, the significant interaction effect was observed between contact time and initial concentration.

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国名：日本国  

Effect of Nano Zero Valent Iron Delivery Method into Porous Media on Phosphorus Removal from Groundwater The main aim of this study is to investigate the effect of the delivery method of nano zero valent iron (NZVI) into porous media on the removal of phosphorus from groundwater. Different column experiments were conducted considering injection and permeable reactive barrier (PRB) approaches using sand-packed column with 65 cm length and 10 cm inner diameter. Results revealed that Injecting 10 g of NZVI into C4 resulted in the highest sorption capacity and average removal efficiency of 25 mg/L phosphorus concentration over 14 days with 197.76 mg-P/g-NZVI and 84.8% respectively. The dissolved oxygen levels in the effluent samples of the NZVI column were declined due to the oxidation process of NZVI, which was accompanied by a lower ORP values. The change of the delivery methodology of NZVI into porous media affected its capacity to remove phosphorus, revealing that injection could be better than PRB in terms of the reactive performance.

記述言語：英語  

国名：日本国  

Effect of Bimetallic Zero Valent Iron Nanoparticles Ag/NZVI on Bacterial Growth In this study, a 13-day operation was conducted in order to investigate the effect of Ag-Fe nanoparticles on bacterial growth. To do so, three samples (S1, S2, S3) made of freshly domestic wastewater were treated under anaerobic conditions. S1 was considered as the control batch while 50mg/L of zero valent iron nanoparticles (NZVI) and Ag-Fe bimetallic nanoparticles were added to S2 and S3, respectively. Results showed that the addition of NZVI was effective in activating the bacterial growth. However, Ag-Fe nanoparticles inhibited the bacterial growth. A comparison of the chemical oxygen demand COD of the three samples confirmed the obtained results.

記述言語：英語  

国名：日本国  

Analogy of iron-copper and iron-silver bimetals during the corrosion process Because of their strong magnetic properties, the Fe based nanomaterials have successfully been used in order to remediate environmental contamination. The synthesis of the bimetallic nanoparticles was done following chemical reduction of ferric chloride with sodium borohydride then deposition of the respective bimetal. This study was conducted to determine the concentration influence on the dissolution of iron in the presence of the bimetallic nanoparticles along with determining the role of FeCu and FeAg bimetals during iron corrosion. The results showed that the higher the dosage, the higher the iron dissolution due to increased surface area hence reactivity. Also, the bimetals improved the reactivity of iron.

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The Involvement of Nanoscale Zero Valent Iron during the Anaerobic Digestion of Sludge Increased production of Waste Activated Sludge (WAS) calls for its proper treatment and this can be achieved by biogas production. The aim of this research was to investigate the impact of 1.5g/L NZVI on the generation of bio-methane through the Anaerobic Digestion (AD) process. The results showed that sludge with NZVI (Sg/NZVI) improved the biogas production due to its electron transfer capability. The pH decreased overtime due to the production of Volatile Fatty Acids (VFA) during the AD process, however, the pH of the control decreased more than that of Sg/NVZI because the H+ was consumed during iron corrosion thus resulting in a favorable pH for the methanogens. But with time, the accumulation of VFA and ammonia resulted in the decreased production of biogas.

記述言語：英語  

国名：日本国  

Removal of Ciprofloxacin from Aqueous Solutions by Nanoscale Zerovalent Iron-Based Materials: A Mini Review Ciprofloxacin is a fluoroquinolone antibiotic developed to fightback several bacterial diseases. The widespread application in human and animal medicine and the low biodegradation resulted in the persistent detection of ciprofloxacin in many water systems. The occurrence of ciprofloxacin threats human and aquatic life by motivating the development of antimicrobial resistant geneses in water. Microscale (ZVI) and nanoscale zerovalent iron (nZVI) were used to efficiently remove ciprofloxacin from aqueous solutions. The aim of this mini review to summarize: (1) the possible routes for ciprofloxacin to enter the environment, (2) the mechanism of oxidizing organic pollutants by nanoscale zerovalent iron (nZVI), (3) the ways to improve the performance of nZVI and overcome its limitations and finally (4) the available treatment systems in the literature which is developed based on NZVI to remove ciprofloxacin from aqueous environments.

記述言語：英語  

国名：日本国  

Numerical Analysis on Turbulence and Air-Water Scalar Transport in Open-Channel Flow Influenced by Thermal Stratification and Surface Shear Stress It is important for estimating accurately the air-water transport of scalar such as heat and gas to understand turbulent characteristics close to the water surface. Near-surface turbulence in natural hydro-environments is influenced by the thermal stratification and the wind shear stress acting on the water surface. The purpose of this study is to numerically investigate how their factors influence the turbulent structure and the air-water scalar transport in an open channel flow by means of the direct numerical simulation, i.e., DNS. We reproduce the combined effects of the thermal stratification and the surface shear stress on the structure of the turbulent flow and the scalar transport on the water surface. The numerical results suggest that the scalar transport velocity is obviously changed by the combined effects of the thermal stratification and the surface shear stress.

記述言語：英語  

国名：日本国  

Innovative Biotechnological Applications of Galdieria Sulphuraria-Red Microalgae (GS-RMA) in Water Treatment Systems In this study, mini review is introduced on the features of the red microalgae (RMA) and its biotechnological potential in different applications. Since it has unique extremophilic features, Galdieria Sulphuraria (GS) is considered to be a perfect microorganism candidate for various biotechnological applications in water treatment systems. Special interest has been oriented towards the applications of GS in water treatment systems, such as nutrients, biological oxygen demand (BOD) and heavy metals (HMs) removal from wastewater. Also, different future prospects have been suggested in terms of the new and innovative applications of GS in water treatment based on the gaps in the literature, including phycoremediation of HMs, bio-resin production, bio-substrate for nanoparticles, and pharmaceuticals removal from wastewater. Finally, the challenges and limitations of employing GS in biotechnological applications have been reviewed, which revealed that using GS has a great potential in largescale outdoor cultivation without becoming contaminated with other microorganisms.

記述言語：英語  

国名：日本国  

Enhancement of Power Generation in Microbial Fuel Cells (Mfcs) Using Iron/Copper Nanoparticles In this study, a lab-scale microbial fuel cell (MFC) was constructed and power generation output was investigated for 45 days of operation. Nanoscale zerovalent iron (NZVI) and Iron/copper nanoparticles (Cu/NZVI) were added to the anode chamber of the MFC with a concentration of 10 mg/L and their effects were investigated on the MFC performance. Results showed that the maximal power output density values increased by 43.33 % using copper/iron nanoparticles compared to the control MFC. Anode chamber was examined, and results proved that conductivity increased by 13.68% and 23.62% using NZVI and Cu/NZVI, respectively. The chemical oxygen demand COD was tested, and the removal efficiency reached 38.88%, 38.26%, and 52.40% for control, NZVI, and Cu/NZVI MFCs, respectively after 45 days of operation. This study highlights the effect of nanoparticles technology on power generation from activated sludge using microbial fuel cells (MFCs).

記述言語：英語  

国名：日本国  

Comparative Study of Bare and Emulsified Nanoscale Zero-valent Iron for Nitrate and Phosphorus Removal This work aims to demonstrate the effect of polyethylene sorbitan monolaurate (PSM) on the properties and reactivity of nanoscale zero-valent iron (nZVI). PSM was used in this work to prepare an emulsified nZVI to overcome the particle aggregation phenomenon of nZVI and show the prepared particles with good properties. For that purpose, TEM, XRD and reactivity test of nitrate and phosphorus were performed to show the changes in the performance of nZVI after being emulsified with PSM. The results showed that the emulsified (PSM) greatly improved the removal efficiency of nitrate. Moreover, PSM enhanced the particle dispersion of nZVI and showed the particles with good properties.The results showed that the emulsified nZVI with PSM was also suitable for reduction of nitrate even at a wide range of pH. This study proposed that the emulsified nZVI could have a significant contribution in the aspects of water treatment only for the reducible contaminates.

記述言語：英語  

国名：日本国  

A Review on Water Conservation and Consumption Behavior: Leading Issues, Promoting Actions, and Managing the Policies. Securing supplies of freshwater is now a big concern for policymakers worldwide. Water saving represents significant pro-environmental behavior for a sustainable water resource. In this paper we present the determinants of conservation and use of household water to establish the relative influence of psychosocial, environmental, and demographic bases. We evaluate the predominant study on the factors influencing excessive water consumption, the various ways in which water agencies can control over-consumption, promote residential water conservation, and claim for the demand-side programs. If we maintain the positive attitude and intention toward conservation, change our daily water use behavior, build the habit to use less water as we can, involve the pro-environmental activities, and if the government properly manage the water demand of every household, this can help to conserve water for our future generation and develop the capability to better implement water conservation agendas that respond to short-term to long term water scarcity crises.

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