| 1. |
Idol Phann, Yu Tanaka, Sae Yamamoto, Naoko Okibe, Utilization of amino acid for selective leaching of critical metals from spent hydrodesulfurization catalyst, Frontiers in Chemistry, 10.3389/fchem.2022.1011518, 10, 1011518-1011518, 2022.10. |
| 2. |
Naoko Okibe, Kohei Nonaka, Taiki Kondo, Kazuhiko Shimada, Peiyu Liu, Microbiological passive treatment of Mn/Zn-containing mine water, Hydrometallurgy, 10.1016/j.hydromet.2023.106084, 219, 2023.05. |
| 3. |
Naoko Okibe, Kaito Hayashi, Keishi Oyama, Kazuhiko Shimada, Yuji Aoki, Takahiro Suwa, Tsuyoshi Hirajima, Bioleaching of enargite/pyrite-rich "dirty" concentrate and arsenic immobilization, Minerals, 10.3390/min12040449, 12, 4, 2022.04. |
| 4. |
Ryohei Nishi, Santisak Kitjanukit, Taiki Kondo, Naoko Okibe, Simultaneous arsenic and iron oxidation for one-step scorodite crystallization using Mn oxide, Materials Transactions, doi:10.2320/matertrans.MT-M2021120, 11, 2021.10.  |
| 5. |
Keishi Oyama, Kyohei Takamatsu, Kaito Hayashi, Yuji Aoki, Shigeto Kuroiwa, Tsuyoshi Hirajima, Naoko Okibe, Carbon-assisted bioleaching of chalcopyrite and three chalcopyrite/enargite-bearing complex concentrates, Minerals, 10.3390/min11040432, 11, 4, 2021.04. |
| 6. |
Ryohei Nishi, Santisak Kitjanukit, Kohei Nonaka, Naoko Okibe, Oxidation of arsenite by self-regenerative bioactive birnessite in a continuous flow column reactor, Hydrometallurgy, 10.1016/j.hydromet.2020.105416, 196, 105416, 2020.09. |
| 7. |
Keishi Oyama, Kazuhiko Shimada, Jun-ichiro Ishibashi, Keiko Sasaki, Hajime Miki, Naoko Okibe, Catalytic mechanism of activated carbon-assisted bioleaching of enargite concentrate, Hydrometallurgy, 10.1016/j.hydromet.2020.105417, 196, 105417, 2020.09. |
| 8. |
Melisa Pramesti Dewi, Himawan Tri Bayu Murti Petrus, Naoko Okibe, Recovering secondary REE value from spent oil refinery catalysts using biogenic organic acids, Catalysts, 10.3390/catal10091090, 10, 9, 1090-15, 2020.09. |
| 9. |
Haruki Noguchi, Naoko Okibe, The role of bioleaching microorganisms in saline water leaching of chalcopyrite concentrate, Hydrometallurgy, 10.1016/j.hydromet.2020.105397, 195, 105397, 2020.08. |
| 10. |
Naoko Okibe, Ryohei Nishi, Yuta Era, Takeharu Sugiyama, The effect of heterogeneous seed crystals on arsenite removal as biogenic scorodite, Materials Transactions, doi.org/10.2320/matertrans.M-M2019858, 61, 2, 387-395, 2019.12. |
| 11. |
Naoko Okibe, Yuken Fukano, Bioremediation of highly toxic arsenic via carbon-fiber-assisted indirect As(III) oxidation by moderately-thermophilic, acidophilic Fe-oxidizing bacteria, Biotechnology Letters, 41, 1403-1413, 2019.10. |
| 12. |
Santisak Kitjanukit, Keiko Sasaki, Naoko Okibe, Production of highly catalytic, archaeal Pd(0) bionanoparticles using Sulfolobus tokodaii, Extremophiles, 23, 5, 549-556, 2019.09. |
| 13. |
Santisak Kitjanukit, Kyohei Takamatsu, Naoko Okibe, Natural attenuation of Mn(II) in metal refinery wastewater: Microbial community structure analysis and isolation of a new Mn(II)-oxidizing bacterium Pseudomonas sp. SK3, Water, 11, 507, 2019.03. |
| 14. |
Intan Nurul Rizki, Yu Tanaka, Naoko Okibe, Thiourea bioleaching for gold recycling from e-waste, Waste Management, 84, 158-165, 2019.02. |
| 15. |
Yusei Masaki, Katsutoshi Tsutsumi, Naoko Okibe, Iron redox transformation by the thermo-acidophilic archaea from the genus Sulfolobus, Geomicrobiology Journal, doi.org/10.1080/01490451.2018.1465491, 35, 9, 757-767, 2018.10. |
| 16. |
Masahito Tanaka, Keiko Sasaki, Naoko Okibe, Behavior of sulfate ions during biogenic scorodite crystallization from dilute As(III)-bearing acidic waters, Hydrometallurgy, 180, 144-152, 2018.07. |
| 17. |
Yusei Masaki, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, Microbiological redox potential control to improve the efficiency of chalcopyrite bioleaching, Geomicrobiology Journal, 35, 8, 648-656, 2018.04. |
| 18. |
Keishi Oyama, Kazuhiko Shimada, Jun-ichiro Ishibashi, Hajime Miki, Naoko Okibe, Silver-catalyzed bioleaching of enargite concentrate using moderately thermophilic microorganisms, Hydrometallurgy, 177, 197-204, 2018.03. |
| 19. |
Intan Nurul Rizki, Naoko Okibe, Size-controlled production of gold bionanoparticles using the extremely acidophilic Fe(III)-reducing bacterium, Acidocella aromatica, Minerals, 8, 81, 1-11, 2018.02. |
| 20. |
Masahito Tanaka, Naoko Okibe, Factors to enable crystallization of environmentally stable bioscorodite from dilute As(III)-contaminated waters, Minerals, 8, 23, 1-16, 2018.01. |
| 21. |
Naoko Okibe, Daisuke Nakayama, Takahiro Matsumoto, Palladium bionanoparticles production from acidic Pd(II) solutions and spent catalyst leachate using acidophilic Fe(III)-reducing bacteria., Extremophiles : life under extreme conditions, 10.1007/s00792-017-0969-4, 21, 6, 1091-1100, 2017.11. |
| 22. |
Masahito Tanaka, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, Optimization of bioscorodite crystallization for treatment of As(III)-bearing wastewaters, Solid State Phenomena, 262, 555-558, 2017.08. |
| 23. |
Keishi Oyama, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, Mechanism of silver-catalyzed bioleaching of enargite concentrate, Solid State Phenomena, 262, 273-276, 2017.08. |
| 24. |
Santisak Kitjanukit, Kyohei Takamatsu, Kenji Takeda, Satoshi Asano, Naoko Okibe, Manganese removal from metal refinery wastewater using Mn(II)-oxidizing bacteria, Solid State Phenomena, 262, 673-676, 2017.08. |
| 25. |
Yuta Era, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, Microbiological As(III) oxidation and immobilization as scorodite at moderate temperatures, Solid State Phenomena, 262, 664-667, 2017.08. |
| 26. |
Naoko Okibe, Shiori Morishita, Masahito Tanaka, Keiko Sasaki, Tsuyoshi Hirajima, Kazuhiro Hatano, Atsuko Ohata, Bioscorodite crystallization using Acidianus brierleyi: Effects caused by Cu(II) present in As(III)-bearing copper refinery wastewaters, Hydrometallurgy, 10.1016/j.hydromet.2016.07.003, 168, 121-126, 2017.03. |
| 27. |
Santisak Kitjanukit, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Microbially facilitated formation of highly catalytic Pd(0) nanoparticles using an extremely acidophilic archaeon, Sulfolobus tokodaii.”, Proc. CINEST 2016, 2016.12. |
| 28. |
Keishi Oyama, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, “Investigating catalytic effect of silver on bioleaching of enargite concentrate.”, Proc. CINEST 2016, 2016.12. |
| 29. |
Yusei Masaki, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, “The effect of microbiological redox potential control on Cu extraction in the chalcopyrite bioleaching system.”, Proc. CINEST 2016, 2016.12. |
| 30. |
Takahiro Matsumoto, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Biorecovery of Pt(0)-nanoparticles using extremely acidophilic Fe(III)-reducing bacteria.”, Proc. CINEST 2016, 2016.12. |
| 31. |
Masahito Tanaka, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Evaluating factors affecting bioscorodite crystallization from As(III)-bearing acidic metal refinery wastewaters.”, Proc. CINEST 2016, 2016.12. |
| 32. |
Katsutoshi Tsutsumi, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Recovery of nickel via reductive bioleaching of Indonesian limonite ore.”, Proc. CINEST 2016, 2016.12. |
| 33. |
Yuta Era, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Arsenic immobilization as bioscorodite at moderate temperatures.”, Proc. CINEST 2016, 2016.12. |
| 34. |
Yusei Masaki, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, “Chalcopyrite bioleaching with redox potential control.”, Proc. Copper 2016, 2016.11. |
| 35. |
Keishi Oyama, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, “Selective bioleaching of enargite (Cu3AsS4) over pyrite (FeS2) for copper recovery.”, Proc. Copper 2016, 2016.11. |
| 36. |
Masahito Tanaka, Keiko Sasaki, Tsuyoshi Hirajima, Naoko Okibe, “Bioscorodite crystallization for treatment of As(III)-bearing copper refinery wastewaters.”, Proc. Copper 2016, 2016.11. |
| 37. |
Yusei Masaki, Katsutoshi Tsutsumi, Shin-Ichi Hirano, Naoko Okibe, Microbial community profiling of the Chinoike Jigoku ("Blood Pond Hell") hot spring in Beppu, Japan: isolation and characterization of Fe(III)-reducing Sulfolobus sp. strain GA1., Research in Microbiology, 10.1016/j.resmic.2016.04.011, 167, 7, 595-603, 2016.09. |
| 38. |
Naoko Okibe, Masashi Maki, Daisuke Nakayama, Keiko Sasaki, Microbial recovery of vanadium by the acidophilic bacterium, Acidocella aromatica., Biotechnology Letters, 10.1007/s10529-016-2131-2, 38, 9, 1475-81, 2016.09. |
| 39. |
Naoko Okibe, Shiori Morishita, Masahito Tanaka, Keiko Sasaki, Tsuyoshi Hirajima, Kazuhiro Hatano, Atsuko Ohata, “Bioscorodite crystallization using Acidianus brierleyi: Effects caused by Cu(II) present in As(III)-bearing copper refinery wastewaters.”, Hydrometallurgy, 168, 121-126, 2016.07. |
| 40. |
Comparison of atmospheric citric acid leaching kinetics of nickel from different Indonesian saprolitic ores
© 2016 Elsevier B.V. All rights reserved. Saprolitic ores from Sulawesi Island (SS ore) contain serpentine and goethite as major minerals, whereas the main minerals in saprolitic ore from Halmahera Island (SH ore) are talc and goethite. Most of the nickel was incorporated in a magnesium-silica-containing mineral. The effects on nickel extraction of leaching temperature, citric acid concentration, and ore particle size were determined to investigate the leaching performances and leaching kinetics of the two saprolitic ores. Nickel leaching efficiency from SS ore is always higher than that from SH ore under the same leaching conditions. The mineral contents of the ores significantly affected the leaching performances and mineral dissolution behaviors of the samples. The results of nickel leaching efficiency and analysis of the solid residues suggest that all dissolved nickel originated from serpentine, which is more easily leached than goethite and talc. The rate of nickel extraction for SS ore was faster than that for SH ore. Nickel leaching from SS ore and SH ore followed the shrinking-core model and was controlled by diffusion of a reactant or product through the solid product layer.. |
| 41. |
Comparison of effectiveness of citric acid and other acids in leaching of low-grade Indonesian saprolitic ores
© 2015 Elsevier Ltd. All rights reserved. Comparison effect of chemical citric acid and other leaching reagents including inorganic acid and other organic acid on nickel extraction from low-grade Indonesian saprolitic ores was evaluated. Two saprolitic ores from two different mining areas (Sulawesi Island and Halmahera Island) in Indonesia were used to investigate the leaching performance and mineral dissolution behaviors of different ore samples using different leaching reagents. Leaching was performed using citric, sulfuric, nitric, hydrochloric, lactic, and oxalic acids. The saprolitic ore from Sulawesi Island (SS) has higher serpentine and lower goethite contents than the saprolitic ore from Halmahera Island (SH). These differences significantly affect the leaching performances and metal dissolution behaviors. Citric acid and sulfuric acid were more effective than other acid solutions for nickel extraction from both samples. Citric acid was very effective for dissolving nickel from serpentine, but did not recover nickel from goethite. In contrast, inorganic acids, namely sulfuric, nitric, and hydrochloric acids, can extract nickel from lateritic ores by dissolving goethite as well as serpentine, but the nickel recoveries achieved with sulfuric acid were higher than those achieved with other inorganic acids. A comparison of the leaching performances of the two samples shows that nickel recovery from SS was higher than that from SH when citric acid leaching was used, but the samples gave similar nickel recoveries in all inorganic acid and lactic acid leaching processes. Moreover, oxalic acid is the least effective reagent for nickel extraction from both samples, because of nickel oxalate precipitation after nickel dissolution. In addition, the effect of a sulfuric acid-citric acid mixture on the nickel dissolution rate was investigated to confirm the individual influences of citric acid and sulfuric acid on the leaching behavior of each sample. The results show that an increase in the amount of sulfuric acid affected the dissolution rate of nickel in leaching of SH much more than that in leaching of SS. In general, the effect of citric acid in the mixture of sulfuric acid and citric acid is attractive. Moreover, citric acid offers not only high nickel recovery and high selectivity of leaching but also an environmentally safe process and low acid consumption.. |
| 42. |
Yusei Masaki, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, “Bioleaching of highly refractory chalcopyrite in the presence of silver catalyst.”, Proc. CINEST 2015, 2015.12. |
| 43. |
Masahito Tanaka, Tsuyoshi Hirajima, Keiko Sasaki, Kazuhiro Hatano, Atsuko Ohata, Naoko Okibe, “Crystallization of biogenic scorodite (FeAsO4·2H2O) from acidic wastewaters containing diluted concentrations of highly toxic arsenite.”, Proc. CINEST 2015, 2015.12. |
| 44. |
Keishi Oyama, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, “Selective bioleaching of enargite (Cu3AsS4) over pyrite (FeS2) for Cu recovery.”, Proc. CINEST 2015, 2015.12. |
| 45. |
Daisuke Nakayama, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Investigating factors affecting the size and distribution of Bio-Pd(0) nanoparticles.”, Proc. CINEST 2015, 2015.12. |
| 46. |
Yuken Fukano, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Mechanism of indirect chemical oxidation of highly toxic As(III), in the presence of carbon fiber via direct microbial Fe(II) oxidation.”, Proc. CINEST 2015, 2015.12. |
| 47. |
Takahiro Matsumoto, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Formation of Pt(0) nanoparticles using the extremely acidophilic Fe(III)-reducing bacteria.”, Proc. CINEST 2015, 2015.12. |
| 48. |
Katsutoshi Tsutsumi, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Effect of Fe(III)-reducing microbes on organic acid leaching of nickel laterite.”, Proc. CINEST 2015, 2015.12. |
| 49. |
Santisak Kitjanukit, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Application of Fe(II)-oxidizing and Fe(III)-reducing abilities of the thermo-acidophilic archaeon, Sulfolobus tokodaii for bioleaching of waste printed circuit boards (WPCB) and formation of Pd(0)-nanoparticles.”, Proc. CINEST 2015, 2015.12. |
| 50. |
Yuniati Mutia Dewi, Kitagawa Keitaro, Hirajima Tsuyoshi, Miki Hajime, Okibe Naoko, Sasaki Keiko, Suppression of pyrite oxidation in acid mine drainage by carrier microencapsulation using liquid product of hydrothermal treatment of low-rank coal, and electrochemical behavior of resultant encapsulating coatings, HYDROMETALLURGY, 10.1016/j.hydromet.2015.09.028, 158, 83-93, 2015.12. |
| 51. |
Yusei Masaki, Shin-ichi Hirano, Naoko Okibe, “Microbial community structure analysis of Blood Pond Hell hot spring in Japan and search for metal-reducing microbes.”, Advanced Materials Research, 10.4028/www.scientific.net/AMR.1130.45, 1130, 45-49, 2015.11. |
| 52. |
Naoko Okibe, Shiori Morishita, Masahito Tanaka, Tsuyoshi Hirajima, Keiko Sasaki, “Effect of Cu(II) on bio-scorodite crystallization using Acidianus brierleyi.”, Advanced Materials Research, 10.4028/www.scientific.net/AMR.1130.101, 1130, 101-104, 2015.11. |
| 53. |
Widi Astuti, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Utilization of metabolic citric acid from Aspergillus niger using corn starch in the nickel leaching of Indonesian saprolitic ore.”, Advanced Materials Research, 10.4028/www.scientific.net/AMR.1130.251, 1130, 251-254, 2015.11. |
| 54. |
Tanaka Masahito, Yamaji Yuta, Fukano Yuken, Shimada Kazuhiko, Ishibashi Jun-Ichiro, Hirajima Tsuyoshi, Sasaki Keiko, Sawada Mitsuru, Okibe Naoko, Biooxidation of Gold-, Silver, and Antimony- Bearing Highly Refractory Polymetallic Sulfide Concentrates, and its Comparison with Abiotic Pretreatment Techniques, GEOMICROBIOLOGY JOURNAL, 10.1080/01490451.2014.981645, 32, 6, 538-548, 2015.07. |
| 55. |
Naoko Okibe, Kiyomasa Sueishi, Mikoto Koga, Yusei Masaki, Tsuyoshi Hirajima, Keiko Sasaki, Shinichi Heguri, Satoshi Asano, “Selenium (Se) removal from copper refinery wastewater using a combination of zero-valent iron (ZVI) and Se(VI)-reducing bacterium, Thaurea selenatis.”, Materials Transactions, 10.2320/matertrans.M2014457, 56, 6, 889-894, 2015.05. |
| 56. |
Yusei Masaki, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, Bioreduction and immobilization of hexavalent chromium by the extremely acidophilic Fe(III)-reducing bacterium Acidocella aromatica strain PFBC., Extremophiles : life under extreme conditions, 10.1007/s00792-015-0733-6, 19, 2, 495-503, 2015.03. |
| 57. |
Yusei Masaki, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, Katsutoshi Tsutsumi, “Microbial community structure analysis of Chinoike-Jigoku (Blood-Pond Hell) hot spring and search for useful microorganisms applicable to bioremediation of heavy metals.”, Proc. CINEST 2014, 2014.12. |
| 58. |
Masahito Tanaka, Yuta Yamaji, Yuken Fukano, Tsuyoshi Hirajima, Keiko Sasaki, Mitsuru Sawada, Naoko Okibe, “Biooxidation of Alaskan refractory gold ore concentrates.”, Proc. CINEST 2014, 2014.12. |
| 59. |
Shiori Morishita, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Effect of Cu(II) on microbial scorodite crystallization from As(III)-containing copper refinery waste-waters.”, Proc. CINEST 2014, 2014.12. |
| 60. |
Daisuke Nakayama, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Formation of Bio-Pd(0) nanoparticles using Fe(III)-reducing, extremely acidophilic bacteria.”, Proc. CINEST 2014, 2014.12. |
| 61. |
Yuken Fukano, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Arsenite removal using acidophilic Fe(II)-oxidizing bacteria in the presence of carbon fiber.”, Proc. CINEST 2014, 2014.12. |
| 62. |
Takahiro Matsumoto, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Microbial synthesis of platinum nanoparticles using extremely acidophilic iron-reducing bacteria.”, Proc. CINEST 2014, 2014.12. |
| 63. |
Naoki Higashidani, Takashi Kaneta, Nobuyuki Takeyasu, Shoji Motomizu, Naoko Okibe, Keiko Sasaki, Speciation of arsenic in a thermoacidophilic iron-oxidizing archaeon, Acidianus brierleyi, and its culture medium by inductively coupled plasma-optical emission spectroscopy combined with flow injection pretreatment using an anion-exchange mini-column., Talanta, 10.1016/j.talanta.2014.01.057, 122, 240-5, 2014.05. |
| 64. |
Daisuke Nakayama, Keiko Sasaki, Tsuyoshi Hirajima, Naoko Okibe, “Formation of Pd(0) nanoparticles by bioreduction of Pd(II) using Fe(III)-reducing, acidophilic bacteria”, Proc. CINEST 2013, 2013.12. |
| 65. |
Okibe Naoko, Koga Masaharu, Morishita Shiori, Tanaka Masahito, Heguri Shinichi, Asano Satoshi, Sasaki Keiko, Hirajima Tsuyoshi, Microbial formation of crystalline scorodite for treatment of As(III)-bearing copper refinery process solution using Acidianus brierleyi, HYDROMETALLURGY, 10.1016/j.hydromet.2014.01.008, 143, 34-41, 2014.03. |
| 66. |
Shiori Morishita, Keiko Sasaki, Tsuyoshi Hirajima, Naoko Okibe, “As(III)-oxidation activity of thermo-acidophilic iron sulfur-oxidizing archaeon, Acidianus brierleyi, and its use in biogenic scorodite (FeAsO4) formation”, Proc. CINEST 2013, 2013.12. |
| 67. |
Yusei Masaki, Keiko Sasaki, Tsuyoshi Hirajima, Naoko Okibe, “Fundamental study on Cr(VI) reduction by acidophilic Fe(III)-reducing bacterium”, Proc. CINEST 2013, 2013.12. |
| 68. |
Masashi Maki, Keiko Sasaki, Tsuyoshi Hirajima, Naoko Okibe, “Biorecovery of vanadium (V) using Fe(III)-reducing, acidophilic bacterium, Acidocella aromatica strain PFBC”, Proc. CINEST 2013, 2013.12. |
| 69. |
Widi Astuti, Tsuyoshi Hirajima, Keiko Sasaki, Naoko Okibe, “Leaching behavior of nickel from Indonesian nickel laterite ores by atmospheric acid leaching using citric acid”, Proc. CINEST 2013, 2013.12. |
| 70. |
Naoko Okibe, Nobuaki Suzuki, Masayuki Inui, Hideaki Yukawa, pCGR2 copy number depends on the par locus that forms a ParC-ParB-DNA partition complex in Corynebacterium glutamicum., Journal of Applied Microbiology, 10.1111/jam.12257, 115, 2, 495-508, 2013.08. |
| 71. |
Naoko Okibe, Masaharu Koga, Keiko Sasaki, Tsuyoshi Hirajima, Shinichi Heguri, Satoshi Asano, “Simultaneous oxidation and immobilization of arsenite from refinery waste water by thermoacidophilic iron-oxidizing archaeon, Acidianus brierleyi”, Minerals Engineering, 48, 126-134, 2013.07. |
| 72. |
Naoko Okibe, Masashi Maki, Keiko Sasaki, Tsuyoshi Hirajima, “Mn(II)-oxidizing activity of Pseudomonas sp. strain MM1 is involved in the formation of massive Mn sediments around Sambe hot springs in Japan”, Materials Transactions, 54, 2027-2031, 2013.07. |
| 73. |
Sasaki Keiko, Uejima Yoshitaka, Sakamoto Atsushi, Yu Qianqian, Ishibashi Junichiro, Okibe Naoko, Hirajima Tsuyoshi, Geochemical and Microbiological Analysis of Sambe Hot Springs, Shimane Prefecture, Japan, RESOURCE GEOLOGY, 10.1111/rge.12002, 63, 2, 155-165, 2013.04. |
| 74. |
Maki Masashi, Naoko Okibe, Keiko Sasaki, Tsuyoshi Hirajima, “Isolation of a manganese oxidizing bacterium from Sanbe hot spring in Shimane, Japan and study of biogenic manganese oxides”, Proc. Kick-off Seminar on ASEAN-Japan BUILD-UP Cooperative Education Program for Global Human Resource Development in Earth Resource Engineering, 2013.01. |
| 75. |
N. Okibe, M. Koga, K. Sasaki, T. Hirajima, S. Heguri, S. Asano, “Simultaneous oxidation and immobilization of arsenite from refinery waste water by thermoacidophilic iron-oxidizing archaeon, Acidianus brierleyi”, Proc. Biohydrometallurgy 2012, 2012.06. |
| 76. |
Effect of microorganisms on flocculation of quartz
Application of microorganisms as surface modifiers in flocculation has generated a great deal of interest in recent times. The surface properties such as zeta-potential and hydrophobicity of minerals and microorganisms play a major role in determining the adsorption of microorganisms onto the minerals and hence the efficiency of flocculation. The utility of microorganisms, including Escherichia coli (wild-type and genetically modified strain Sip), Arthrobacter nicotianae, Bacillus licheniformis, and Pseudomonas maltophilia, has been evaluated by measuring their zeta-potentials and carrying out adsorption and flocculation experiments. Of the tested microorganisms, adsorption of E. coli strain Sip significantly modified the quartz surface. The zeta-potential of the quartz became highly positive at acidic pH, and its IEP (isoelectric point) was shifted from pH |
| 77. |
M Maki, N Okibe, K Sasaki, T Hirajima, “Isolation of a manganese oxidizing bacterium from Sanbe hot spring in Shimane, Japan.” , Proc. CINEST 2011, 2011.12. |
| 78. |
M Koga, N Okibe, K Sasaki, T Hirajima, “Recovery of selenium from copper refinery waste water using a selenite-reducing bacterium, Thauera selenatis.”, Proc. CINEST 2011, 2011.12. |
| 79. |
M Koga, N Okibe, K Sasaki, T Hirajima, “Immobilization of arsenite from the refining discharge using a thermophilic acidophilic iron-oxidizing archaeon, Acidianus brierleyi”, Proc. CINEST 2011, 2011.12. |
| 80. |
T Hirajima, Y Aiba, M Farahat, N Okibe, K Sasaki, T Tsuruta, K Doi, “Flocculation of quarts by microorganisms”, Biohydrometallurgy; biotech key to unlock mineral resources value (G Qiu, T. jiang, W. Qin, X. Liu, Y. Tang and H. Wang eds). Central South University, Changsha, China, 441-444, 2011.09. |
| 81. |
K Sasaki, M Koga, K Takatsugi, N Okibe, T Hirajima, S Asano, S Heguri , “Immobilization of arsenite from the refining discharge using Acidianus brierleyi in the presence of pyrite.” , Biohydrometallurgy; biotech key to unlock mineral resources value (G Qiu, T. jiang, W. Qin, X. Liu, Y. Tang and H. Wang eds). Central South University, Changsha, China, 1106-1108, 2011.09. |
| 82. |
Okibe Naoko, Johnson D. Barrie, A rapid ATP-based method for determining active microbial populations in mineral leach liquors, HYDROMETALLURGY, 10.1016/j.hydromet.2011.04.008, 108, 3-4, 195-198, 2011.07. |
| 83. |
Okibe N, Suzuki N, Inui M, Yukawa H, Efficient markerless gene replacement in Corynebacterium glutamicum using a new temperature-sensitive plasmid., Journal of microbiological methods, 10.1016/j.mimet.2011.02.012, 85, 2, 155-163, 2011.05. |
| 84. |
Naoko Okibe, Nobuaki Suzuki, Masayuki Inui, Hideaki Yukawa, Antisense-RNA-mediated plasmid copy number control in pCG1-family plasmids, pCGR2 and pCG1, in Corynebacterium glutamicum., Microbiology, 10.1099/mic.0.043745-0, 156, Pt 12, 3609-3623, 2010.12. |
| 85. |
D Barrie Johnson, Paula Bacelar-Nicolau, Naoko Okibe, Angharad Thomas, Kevin B Hallberg, Ferrimicrobium acidiphilum gen. nov., sp. nov. and Ferrithrix thermotolerans gen. nov., sp. nov.: heterotrophic, iron-oxidizing, extremely acidophilic actinobacteria., International Journal of Systematic and Evolutionary Microbiology, 10.1099/ijs.0.65409-0, 59, Pt 5, 1082-9, 2009.05. |
| 86. |
Nobuaki Suzuki, Keiro Watanabe, Naoko Okibe, Yoshiki Tsuchida, Masayuki Inui, Hideaki Yukawa, Identification of new secreted proteins and secretion of heterologous amylase by C. glutamicum., Applied Microbiology and Biotechnology, 10.1007/s00253-008-1786-6, 82, 3, 491-500, 2009.03. |
| 87. |
Keiro Watanabe, Yoshiki Tsuchida, Naoko Okibe, Haruhiko Teramoto, Nobuaki Suzuki, Masayuki Inui, Hideaki Yukawa, Scanning the Corynebacterium glutamicum R genome for high-efficiency secretion signal sequences., Microbiology, 10.1099/mic.0.024075-0, 155, Pt 3, 741-750, 2009.03. |
| 88. |
Effect of temperature on the bioleaching of chalcopyrite concentrates containing different concentrations of silver
The primary copper sulfide mineral chalcopyrite (CuFeS2) is recalcitrant to both chemical and biological leaching, due to the supposed passivation of the mineral surface by sulfur and/or ferric iron compounds. Previous work has shown that addition of soluble silver can enhance solubilisation of copper from chalcopyrite by acidophilic bacteria. Silver may also be present in the concentrate itself. Here we describe the bioleaching of chalcopyrite concentrates with silver contents varying from 98% over 30 days) from the 1500 g/t chalcopyrite concentrate at 30 °C was achieved using pure and mixed cultures of At. ferrooxidans. The results indicated that chalcopyrite concentrates that contain significant concentrations of silver are highly amenable to bioleaching at relatively low temperatures, using well-known acidophilic micro-organisms. © 2008 Elsevier B.V. All rights reserved.. |
| 89. |
D Barrie Johnson, Liu Yajie, Naoko Okibe, "Bioshrouding": a novel approach for securing reactive mineral tailings., Biotechnology Letters, 10.1007/s10529-007-9574-4, 30, 3, 445-9, 2008.03. |
| 90. |
Attachment of acidophilic bacteria to solid surfaces: The significance of species and strain variations
Sixteen strains of acidophilic bacteria were screened for their abilities to adhere to pyrite ore, glass beads and ferric hydroxysulfates. These were three culture collection and two isolated strains of the iron- and sulfur-oxidizer, Acidithiobacillus ferrooxidans, two each of the sulfur-oxidizer Acidithiobacillus thiooxidans and the iron-oxidizer Leptospirillum ferrooxidans (the type strain and a mine isolate in either case), five heterotrophic acidophiles (four Acidiphilium and one Acidocella sp.) and two moderately thermophilic iron/sulfur-oxidizers (Sulfobacillus thermosulfidooxidans and Sulfobacillus acidophilus). Considerable variations were found between different species of acidophiles, and also between different strains of the same species, in how they attached to the three solid materials tested. Attachment to the solid substrata generally increased with time (over 100 min) though > 99% of one At. ferrooxidans isolate (strain OP14) were attached to pyrite after just 10 min exposure. Most acidophiles attached more readily to pyrite than to glass beads, and attachment to ferric hydroxysulfates was highly variable, though one At. ferrooxidans isolate (strain SJ2) and one heterotrophic acidophile (Acidocella sp. het-4) both attached strongly to ferric iron precipitates (jarosites and schwertmannite) that formed in cultures of At. ferrooxidans grown at pH > 2. The results of these experiments showed that even closely related strains of acidophilic bacteria can display very different propensities to attach to solid materials, an observation that may explain the somewhat disparate results reported on occasions by research groups that have examined single, or limited numbers of strains, of acidophiles (mostly At. ferrooxidans). The significance of differential attachment of mineral-oxidizing and other acidophiles to pyrite and other solids is discussed in the context of biohydrometallurgy. © 2006 Elsevier B.V. All rights reserved.. |
| 91. |
D Barrie Johnson, Naoko Okibe, Kevin B Hallberg, Differentiation and identification of iron-oxidizing acidophilic bacteria using cultivation techniques and amplified ribosomal DNA restriction enzyme analysis., Journal of Microbiological Methods, 10.1016/j.mimet.2004.10.002, 60, 3, 299-313, 2005.03. |
| 92. |
N Okibe, DB Johnson, “Bioleaching of pyrite by defined mixed populations of moderately thermophilic acidophiles in pH-controlled bioreactors.” , Biohydrometallurgy; a sustainable technology in evolution (Tsezos, M., Hatzikioseyian, A. and Remoudaki, E., eds.). National Technical University of Athens, Zografou, Greece, 165-173, 2004.09. |
| 93. |
Naoko Okibe, D Barrie Johnson, Biooxidation of pyrite by defined mixed cultures of moderately thermophilic acidophiles in pH-controlled bioreactors: significance of microbial interactions., Biotechnology and Bioengineering, 10.1002/bit.20138, 87, 5, 574-83, 2004.09. |
| 94. |
D Barrie Johnson, Naoko Okibe, Francisco F Roberto, Novel thermo-acidophilic bacteria isolated from geothermal sites in Yellowstone National Park: physiological and phylogenetic characteristics., Archives of Microbiology, 10.1007/s00203-003-0562-3, 180, 1, 60-8, 2003.07. |
| 95. |
Naoko Okibe, Mariekie Gericke, Kevin B Hallberg, D Barrie Johnson, Enumeration and characterization of acidophilic microorganisms isolated from a pilot plant stirred-tank bioleaching operation., Applied and Environmental Microbiology, 10.1128/AEM.69.4.1936-1943.2003, 69, 4, 1936-43, 2003.04. |
| 96. |
N Okibe, K Amada, S Hirano, M Haruki, T Imanaka, M Morikawa, S Kanaya, “Gene cloning and characterization of aldehyde dehydrogenase from a petroleum-degrading bacterium, strain HD-1.”, Journal of Bioscience and Bioengineering, 88, 1, 7-11, 1999.07. |
| 97. |
DB Johnson, P Bacelar-Nicolau, N Okibe, A Yahya, KB Hallberg, “Role of pure and mixed cultures of Gram-positive eubacteria in mineral leaching.”, Biohydrometallurgy: Fundamentals, Technology and Sustainable Development. (Ciminelli, V. S. T. and Garcia Jr., O., eds.) Amsterdam, Elsevier, 11A, 461-470, 2001.09. |
| 98. |
N Okibe, DB Johnson, “Bioleaching of pyrite by defined mixed cultures of moderately thermophilic acidophiles.”, Biohydrometallurgy: Fundamentals, Technology and Sustainable Development. (Ciminelli, V. S. T. and Garcia Jr., O., eds.) Amsterdam, Elsevier, 11A, 443-451, 2001.09. |
