九州大学-研究者情報 [三木一 (准教授) 工学研究院地球資源システム工学部門]

三木一（みきはじめ）

データ更新日：2024.04.25

准教授　／　工学研究院地球資源システム工学部門国際連携資源ﾌﾛﾝﾃｨｱ教育講座(特定教育研究講座)

学会発表等

1.	B. DANIYAROV, G.P.W. SUYANTARA, H. MIKI, T. HIRAJIMA, K. SASAKI, D. OCHI, Y. AOKI , Separation of enargite and chalcocite with H2O2 oxidation treatment using flotation method, The 16th International Symposium on East Asian Resources Recycling Technology, (EARTH2021), 2021.11.
2.	Y. TANAKA, T. HIRAJIMA, H. MIKI, G.P.W. SUYANTARA, Estimation of Cu and Mo recoveries of five type ores composite in seawater flotation, Copper2022 International Conference, 2022.11.
3.	G.P.W. SUYANTARA, T. HIRAJIMA, H. MIKI, K. SASAKI, Y. TANAKA, Y. AOKI, Investigation of sodium sulfite as a selective depressant in the flotation of chalcopyrite and enargite, Copper2022 International Conference, 2022.11.
4.	H. MIKI, G.P.W. SUYANTARA, K. SASAKI, T. HIRAJIMA, Y. AOKI, H. FUKUDA, Arsenic removal from arsenic containing copper concentrate with heat treatment and magnetic separation, Copper2022 International Conference, 2022.11.
5.	H. MIKI, H. FUKUDA, G.P.W. SUYANTARA, B. DANIYAROV, T. HIRAJIMA, K. SASAKI , The estimation of microgram powder electrode system on sulfide mineral oxidation for mineral processing, Copper2022 International Conference, 2022.11, Electrochemistry with powder sample is essential for hydrometallurgy since in many case sample can obtain only with powder form such as ground mineral or precipitations. However, powder electrode system is not well developed since it is difficult to obtain reproducibility and sensitivity with current carbon paste electrode. Authors has developed its well sensitivity and reproducibility with relative simple method for powder sample electrode. This system yields highly reproducible results and is sensitive compared with conventional electrode systems for various sulfide minerals. Authors estimate this method to apply oxidation behavior on various sulfide minerals. These results can be utilized with sulfide oxidation leaching or mineral processing method. From this method, results of various primary copper sulfide and secondary sulfide minerals will be indicated and reaction model will be discussed on this research..
6.	三木一、Suyantara Gde Pandhe Wisnu、平島剛、沖部奈緒子、笹木圭子、青木悠二、忰山卓矢, 九州大学における銅原料中からのヒ素低減技術開発の取り組み, 資源・素材2021年度春季大会, 2021.03.
7.	瀬元祐希、スヤンタラグディパンディウィスヌ、三木一、笹木圭子、平島剛、青木悠二、田中善之, 海水でのCu-Mo選択浮遊選別法の開発, 資源・素材2021年度春季大会, 2021.03.
8.	瀬元祐希、Gde Pandhe Wisnu Suyantara、三木一、笹木圭子、平島剛、青木悠二, 海水下での黄銅鉱･輝水鉛鉱選択的浮遊選別に関する研究, 一般社団法人資源・素材学会　2020年度　九州支部会, 2020.05.
9.	Semoto Yuki、Suyantara Gde Pandhe Wisnu、Miki Hajime、Sasaki Keiko、Hirajima Tsuyoshi、Aoki Yuji, The study of selective flotation separation of copper-molybdenite with seawater, International Symposium on Earth Science and Technology 2020, 2020.11.
10.	Suyantara Gde Pandhe Wisnu、Hirajima Tsuyoshi、Orii Yuta、Miki Hajime、Sasaki Keiko、Kuroiwa Shigeto、Aoki Yuji, Effect of a sulfite reagent on floatability of chalcopyrite and enargite, IMPC 2020:XXX International Mineral Processing Congress, 2020.10.
11.	Tanaka Yoshiyuki、Miki Hajime、Suyantara Gde Pandhe Wisnu、Hirajima Tsuyoshi、Aoki Yuji、Okamoto Hideyuki, Effect of seawater and process water on copper-molybdenum rougher flotation in batch and pilot test, IMPC 2020:XXX International Mineral Processing Congress, 2020.10.
12.	Miki Hajime、Hirajima Tsuyoshi、Suyantara Gde Pandhe Wisnu、Orii Yuta、Sasaki Keiko、Kuroiwa Shigeto、Aoki Yuji, Selective flotation for removal of impurities on copper concentrates with various redox reactions, IMPC 2020:XXX International Mineral Processing Congress, 2020.10.
13.	折居優太、Gde Pandhe Wisnu Suyantara、三木一、笹木圭子、平島剛、黒岩樹人、青木悠二、山根正嗣, 含ヒ素硫化銅鉱物と非含ヒ素硫化銅鉱物の浮選分離に及ぼす捕収剤の影響, 資源・素材学会春季大会, 2020.03.
14.	瀬元祐希、Gde Pandhe Wisnu Suyantara、三木一、平島剛、青木悠二、黒岩樹人、田中善之, 海水を用いたCu-Mo選択浮遊選別に関する研究, 資源・素材学会春季大会, 2020.03.
15.	Yuta Orii, Gde Pandhe Wisnu Suyantara, Hajime Miki, Keiko Sasaki, Tsuyoshi Hirajima, Shigeto Kuroiwa, Yuji Aoki, Study of selective flotation of copper sulfide and As containing copper minerals, International Symposium on Earth Science and Technology 2019, 2019.11.
16.	Gde Pandhe Wisnu Suyantara, Tsuyoshi Hirajima, Hajime Miki, Keiko Sasaki, Shigeto Kuroiwa, Yuji Aoki, Effect of hydrogen peroxide on the separation of copper sulfide minerals and arsenic-bearing copper minerals using flotation, Flotation'19 International Conference, 2019.10.
17.	Gde Pandhe Wisnu Suyantara, Tsuyoshi Hirajima, Hajime Miki, Keiko Sasaki, Shigeto Kuroiwa, Yuji Aoki, Effect of seawater on bubble interactions with chalcopyrite and molybdenite surfaces, Flotation'19 International Conference, 2019.10.
18.	Hajime Miki, Tsuyoshi Hirajima, Gde Pandhe Wisnu Suyantara, Keiko Sasaki, Selective Flotation on Chalcopyrite and Molybdenite with Various Redox Reactions, The 15th Internatonal Symposium on East Asian Resources Recycling Technology, 2019.09.
19.	折居優太、Gde Pandhe Wisnu Suyantara、三木一、笹木圭子、平島剛、黒岩樹人、青木悠二, 亜硫酸ナトリウム添加による硫化銅鉱物と含ヒ素銅鉱物の浮選分離に関する研究, 資源・素材学会秋季大会, 2019.09.
20.	Gde Pandhe Wisnu Suyantara, Tsuyoshi Hirajima, Hajime Miki, Keiko Sasaki, Masashi Yamane, Eri Takida, Shigeto Kuroiwa, Yuji Imaizumi, Mitsuru Sawada, Separation of molybdenite and chalcopyrite using various oxidation treatments, 10th Copper International Conference, 2019.08.
21.	Hajime Miki, Tsuyoshi Hirajima, Gde Pandhe Wisnu Suyantara, Keiko Sasaki, Effect of Heating Treatment on Magnetic Properties, 10th Copper International Conference, 2019.08.
22.	折居優太、Gde Pandhe Wisnu Suyantara、三木一、笹木圭子、平島剛, 亜硫酸ナトリウム添加による斑銅鉱とヒ四面銅鉱の浮選分離に関する研究, 資源・素材学会九州支部会, 2019.05.
23.	Oyama Keishi、Miki Hajime、Okibe Naoko, Evaluation of Catalytic Effect of Activated Carbon on Enargite Bioleaching , International Symposium on Earth Science and Technology 2018, Fukuoka, Japan, 2018.11.
24.	Takamatsu Kyohei、Oyama Keishi、Miki Hajime、Okibe Naoko, Carbon-assisted bioleaching of chalcopyrite concentrate, International Symposium on Earth Science and Technology 2018, Fukuoka, Japan, 2018.11.
25.	小山恵史、三木一、笹木圭子、沖部奈緒子, 硫砒銅鉱バイオリーチングにおける活性炭触媒の影響, 資源・素材学会秋季大会, 2018.09.
26.	Miki Hajime、Hirajima Tsuyoshi、Muta Yukihiro、Suyantara Gde、Sasaki Keiko, Investigation of reagents for selective flotation on chalcopyrite and molybdenite, XXIV International Mineral Processing Congress (IMPC 2018), Moscow, Russia, 2018.08.
27.	Suyantara Gde Pandhe Wisnu、Hirajima Tsuyoshi、Miki Hajime、Sasaki Keiko, The use of Fenton’s reagent on selective flotation of chalcopyrite and molybdenite, XXIV International Mineral Processing Congress (IMPC 2018), Moscow, Russia, 2018.08.
28.	Gde Pandhe Wisnu SUYANTARA, Tsuyoshi HIRAJIMA, Hajime MIKI, Keiko SASAKI, Effect of Seawater on Selective Flotation of Chalcopyrite and Molybdenite, International Symposium on Earth Science and Technology 2017 (CINEST), 2017.12.
29.	Keishi Oyama, Haruki NOGUCHI, Tsuyoshi HIRAJIMA, Keiko SASAKI, Hajime MIKI, Naoko OKIBE, Catalytic Effect of Activated Carbon on Bioleaching of Enargite Concentrate, International Symposium on Earth Science and Technology 2017 (CINEST), 2017.12.
30.	G.P.W. SUYANTARA, Tsuyoshi HIRAJIMA, Hajime MIKI, Keiko SASAKI, Study on the Effect of a Mixture of Hydrogen Peroxide and Ferrous Sulfate on the Floatability of Chalcopyrite and Molybdenite, Flotation ‘17, 2017.11.
31.	Tsuyoshi HIRAJIMA, Hajime MIKI, Y. MUTA, G.P.W. SUYANTARA, Keiko SASAKI, Development of Alternative Additive of NaHS for Selective Flotation of Chalcopyrite and Molybdenite, Flotation ‘17, 2017.11.
32.	Keishi OYAMA, Tsuyoshi HIRAJIMA, Keiko SASAKI, Hajime MIKI, Naoko OKIBE, Mechanism of Silver－Catalyzed Bioleaching of Enargite Concentrate, IBS 2017, 2017.09.
33.	Tsuyoshi HIRAJIMA, Hajime MIKI, G.P.W. SUYANTARA, Hidekazu MATSUOKA, Keiko SASAKI, Oxidation of Chalcopyrite and Molybdenite with Hydrogen Peroxide and its Application to Their Separation, Fifth International conference on Multifunctional, Hybrid and Nanomaterials, 2017.03.
34.	Keishi Oyama, Tsuyoshi Hirajima, Keiko Sasaki, Hajime Miki, Naoko Okibe, Mechanism of silver-catalyzed bioleaching of enargite concentrate, 22nd International Biohydrometallurgy Symposium, 2017, 2017.01, Silver-catalyzed bioleaching of enargite concentrate with three bacteria (Acidimicrobium ferrooxidans ICP, Sulfobacillus sibiricus N1, Acidithiobacillus caldus KU) and one archaeon (Ferroplasma acidiphilum Y) was conducted in order to elucidate the catalytic mechanism of silver sulfide in enargite bioleaching. Whereas Cu recovery remained relatively low (43%) and Fe dissolved completely without silver sulfide, Cu recovery was greatly enhanced (96%) and Fe dissolution was suppressed (29%) in the presence of 0.04% silver sulfide. In the latter case, 52% of the solubilized As was re-immobilized, in contrast to only 14% As re-immobilization in the former. The silver-catalyzed bioleaching (at 0.04% silver sulfide) proceeded at low redox potentials within the optimal range, which likely promoted enargite dissolution via formation of intermediate Cu₂ S. XAFS analysis revealed that As was mainly immobilized as As(V), which was in agreement with the EPMA results detecting ferric arsenate passivation on some enargite grains. Furthermore, formation of trisilver arsenic sulfide (Ag₃ AsS₄) was detected by XRD and EPMA, covering the surface of enargite particles. An intermediate layer, consisting of (Cu,Ag)₃ AsS₄, was also observed between the enargite grain and trisilver arsenic sulfide layer, implying that Cu in enargite may be gradually substituted by solubilized Ag. Kinetic study suggested that these secondary minerals do not rate-limit the enargite dissolution. The overall mechanism of silver-catalyzed bioleaching of enargite concentrate will be proposed..
35.	Tsuyoshi HIRAJIMA, Hidekazu MATSUOKA, Hajime MIKI, Gde Pandhe Wisnu SUYANTARA, Ahmed Mohamed ELMAHDY, Keiko SASAKI, Comparison of Selective Flotation of Chalcopyrite and Molybdenite with Various Oxidation Techniques, XXVIII International Mineral Processing Congress (IMPC 2016), 2016.10.
36.	Gde Pandhe Wisnu SUYANTARA, Tsuyoshi HIRAJIMA, A. M. ELMAHDY, Hajime MIKI, Keiko SASAKI, Effect of Kerosene on Bubble Interaction with Molybdenite and Chalcopyrite in MgCl2 Solution, XXVIII International Mineral Processing Congress (IMPC 2016), 2016.10.
37.	小山恵史, 平島剛, 笹木圭子, 三木一, 沖部奈緒子, 硫砒銅鉱のバイオリーチングにおける銀触媒の影響, 資源・素材学会春季大会, 2016.03.
38.	平島剛, 三木一, 松岡秀和, Suyantara G.P.W., Elmahdy A. M., 笹木圭子, 表面酸化による難処理硫化鉱の分離に関する研究, 資源・素材学会春季大会, 2016.03.
39.	Hidekazu MATSUOKA, Tsuyoshi Hirajima, Sasaki Keiko, Hajime Miki, Various Surface Treatment Techniques of Molybdenite and Chalcopyrite, International Symposium on Earth Science and Technology 2015 (CINEST), 2015.12.
40.	Akinobu IGUCHI, Hajime Miki, Tsuyoshi Hirajima, Sasaki Keiko, Effect of Silver Addition in Potential Controlled Solution on Dissolution Rate of Enargite, International Symposium on Earth Science and Technology 2015 (CINEST), 2015.12.
41.	Keishi OYAMA, Tsuyoshi Hirajima, Sasaki Keiko, Hajime Miki, Naoko Okibe, Selective Bioleaching of Enargite (Cu3AsS4) over Pyrite (FeS2) for Cu Recovery, International Symposium on Earth Science and Technology 2015 (CINEST), 2015.12.
42.	Yusei MASAKI, Tsuyoshi Hirajima, Sasaki Keiko, Hajime Miki, Naoko Okibe, Bioleaching of Highly Refractory Chalcopyrite in The Presence of Silver Catalyst, International Symposium on Earth Science and Technology 2015 (CINEST), 2015.12.
43.	Tsuyoshi Hirajima, Hidekazu MATSUOKA, Hajime Miki, Ahmed Mohamed Elmahdy Ahmed MOHAMED, Sasaki Keiko, Study of Selective Flotation of Chalcopyrite and Molybdenite with Various Oxidation, Flotation ‘15, 2015.11.
44.	Tsuyoshi Hirajima, Osamu ICHIKAWA, G.P.W. SUYANTARA, Hajime Miki, Sasaki Keiko, Ahmed Mohamed Elmahdy Ahmed MOHAMED, Seawater Divalent Cations (MgCl2 and CaCl2) Effect on the Flotation of Molybdenite and Chalcopyrite, Flotation ‘15, 2015.11.
45.	井口明信, 三木一, 平島剛, 笹木圭子, 澤田満, 含砒素硫化銅鉱物の硫酸浸出に対する銀および溶液電位調整の影響, 資源・素材学会春季大会, 2015.03.
46.	松岡秀和, 平島剛, 笹木圭子, 三木一, 澤田満, 黄銅鉱と輝水鉛鉱の電気化学的表面処理に関する研究, 資源・素材学会春季大会, 2015.03.
47.	Hidekazu MATSUOKA, Tsuyoshi HIRAJIMA, Keiko SASAKI, Hajime MIKI, Mitsuru SAWADA, Electrochemical Treatment of Molybdenite and Chalcopyrite, International Symposium on Earth Science and Technology 2014 (CINEST), 2014.12.
48.	Mutia Dewi YUNIATI, Tsuyoshi HIRAJIMA, Hajime MIKI, Keiko SASAKI, Silica Covering Layer on the Chalcopyrite Surface: Electrochemical Behaviors and Depression Effect on Copper-Molybdenum Flotation, International Symposium on Earth Science and Technology 2014 (CINEST), 2014.12.
49.	Akinobu IGUCHI, Hajime MIKI, Tsuyoshi HIRAJIMA, Keiko SASAKI, Mitsuru SAWADA, The Effect of Solution Potential and Silver Ion Addition on Dissolution Rate of Enargite, International Symposium on Earth Science and Technology 2014 (CINEST), 2014.12.
50.	Tsuyoshi HIRAJIMA, Masanori MORI, Osamu ICHIKAWA, Keiko SASAKI, Hajime MIKI, Mitsuru SAWADA, Selective Flotation of Chalcopyrite and Molybdenite by Surface Oxidation, XXVII International Mineral Processing Congress (IMPC 2014), 2014.10.
51.	Hajime MIKI, Tsuyoshi HIRAJIMA, Mutia Dewi YUNIATI, Keiko SASAKI, Suppression of Pyrite and Arsenopyrite Oxidation by Silica Coating: Electrochemical aspects and the mechanism, XXVII International Mineral Processing Congress (IMPC 2014), 2014.10.
52.	Yuniati Mutia Dewi, 平島剛, 三木一, 笹木圭子, シリカコーティングによる黄鉄鉱の酸化抑制の検証に関する電気化学インピーダンス法の有用性, 資源・素材学会秋季大会, 2014.09.
53.	三木一, 平島剛, 岡和儀, 笹木圭子, 新型微量粉末電極を用いた黄銅鉱浸出挙動の解析, 資源・素材学会秋季大会, 2014.09.
54.	井口明信三木一平島剛笹木圭子澤田満, 初期溶液電位調整による含砒素硫化銅鉱物の硫酸浸出挙動, 資源・素材学会九州支部会, 2014.05.
55.	松岡秀和, 平島剛, 笹木圭子, 三木一, 市川修, 澤田満, 電気化学的表面処理を行った黄銅鉱と輝水鉛鉱の浮選分離, 資源・素材学会九州支部会, 2014.05.
56.	Osamu Ichikawa, Tsuyoshi Hirajima, Masanori Mori, Keiko Sasaki, Hajime Miki, Mitsuru Sawada, XPS and AFM Analysis of Plasma Oxidized Chalcopyrite and Molybdenite for New Selective Flotation Technique, International Conference on Biological, Civil and Environmental Engineering (BCEE-2014), 2014.03.
57.	三木一, 井口明信, 平島剛, 笹木圭子, 澤田満, 硫酸酸性溶液中における含砒素銅鉱物浸出の電位依存性, 資源・素材学会春季大会, 2014.03.
58.	市川修, 平島剛, 森優典, 笹木圭子, 三木一, 澤田満, 黄銅鉱と輝水鉛鉱の浮選分離に関する研究, 資源・素材学会春季大会, 2014.03.
59.	Mutia Dewi Yuniati, 平島剛, 三木一, 笹木圭子, シリカコーティングによる硫化鉱の酸化挙動, 資源・素材学会春季大会, 2014.03.
60.	Masanori Mori, Tsuyoshi Hirajima, Osamu Ichikawa, Keiko Sasaki, Hajime Miki, Mitsuru Sawada, Floatability Modification of Chalcopyrite and Molybdenite with Plasma Treatment, International Symposium on Earth Science and Technology 2013, 2013.12.
61.	Osamu Ichikawa, Tsuyoshi Hirajima, Masanori Mori, Keiko Sasaki, Hajime Miki, Mitsuru Sawada, Surfaces Characterization of Plasma Treated Chalcopyrite and Molybdenite, International Symposium on Earth Science and Technology 2013, 2013.12.
62.	Hajime Miki, Tsuyoshi Hirajima, Mutia Dewi Yuniati, Keiko Sasaki, Study of Silicate Coating on Pyrite Oxidation Suppression: Fundamental Mechanism and Kinetic Analysis, International Symposium on Earth Science and Technology 2013, 2013.12.
63.	Mutia Dewi Yuniati, Tsuyoshi Hirajima, Hajime Miki, Keiko Sasaki, Electrochemical Study of Silicate Coating on Sulphide Minerals Oxidation, International Symposium on Earth Science and Technology 2013, 2013.12.
64.	Hajime Miki, Tsuyoshi Hirajima, Mutia Dewi Yuniati, Keiko Sasaki, Suppression of Pyrite Oxidation by Silicate Coating with Catechol Complex Oxidation – Kinetics Estimation with Electrochemistry, The 12th Internatonal Symposium on East Asian Resources Recycling Technology, 2013.11, [URL].
65.	Tsuyoshi Hirajima, Masanori Mori, Osamu Ichikawa, Keiko Sasaki, Hajime Miki, Mitsuru Sawada, Selective flotation of chalcopyrite and molybdenite with plasma pre-treatment, Flotation '13, 2013.11, [URL].
66.	森優典, 市川修, 平島剛, 笹木圭子, 三木一, 澤田満, 酸化処理による黄銅鉱と輝水鉛鉱の浮選分離に関する研究, 資源・素材学会　秋季大会, 2013.09.
67.	市川修, 森優典, 平島剛, 笹木圭子, 三木一, 澤田満, プラズマ酸化処理による黄銅鉱と輝水鉛鉱の表面性状変化, 資源・素材学会　秋季大会, 2013.09.
68.	Hisaya Tsuji, Satoshi Kumagai, Pilasnee Limsuwan, 平島剛, 笹木圭子, 三木一, Hydrothermal Treatment of Coconut Shell and Recovery of Furfural, International Conference on Green Energy and Technologies (ICGET), 2013.08.
69.	三木一, オーストラリアにおける鉱物資源開発の現状, 資源・素材学会九州支部春季例会, 2013.05.
70.	市川修, 森優典, 平島剛, 笹木圭子, 三木一, 澤田満, 浮遊選別による黄銅鉱と輝水鉛鉱の分離に関する研究, 資源・素材学会九州支部春季例会, 2013.05.
71.	森優典, 市川修, 平島剛, 笹木圭子, 三木一, 澤田満, 硫化鉱物浮選に関する研究, 資源・素材学会春季大会, 2013.03.
72.	三木一, Gamini Senanayake, 沈降シリカによる黄銅鉱浸出の触媒作用の研究, 資源・素材学会春季大会, 2013.03.
73.	Michael James Nicol, Hajime Miki, Derick Rautenbach, Craig van Buuren, Norma Hoyos, Lilian Velasquez, The Development of Heap Leaching Based on Chloride for Primary and Secondary Copper Minerals, Hydroprocess2012, 2012.07.
74.	Hajime Miki, Michael James Nicol, Rautenbach Derick, Lilian Velasquez, Craig van Buuren, The Development of Heap Leaching Based on Chloride for Primary and Secondary Copper Minerals, Percolation Leaching: The status globally and in Southern Africa 2011, 2011.11.
75.	Petrus Basson, Hajime Miki, Michael James Nicol, Lilian Velasquez, Enhanced Leaching of Chalcopyrite at Low Potentials in Chloride Solutions. 1. Concentrates, Copper2010 International Conference, 2010.06.
76.	Petrus Basson, Hajime Miki, Michael James Nicol, Lilian Velasquez, Enhanced Leaching of Chalcopyrite at Low Potentials in Chloride Solutions. 1. Mechanisms, Copper2010 International Conference, 2010.06.
77.	Hajime Miki, Michael James Nicol, The Kinetics of the Copper-catalysed Oxidation of Iron(II) in Chloride Solutions, Hydrometallurgy 2008, 2008.08.
78.	Hajime Miki, Michael James Nicol, Synergism in the oxidation of covellite and pyrite in chloride solutions containing iron(III) and copper(II), Hydrometallurgy 2008, 2008.08.
79.	Michael James Nicol, Hajime Miki, Applications of the electrochemistry of fine mineral sulfides, Innovations in Natural Resource Processing, 2005.02.
80.	Hajime Miki, Naoki Hiroyoshi, Shigeto Kuroiwa, Masami Tsunekawa, Tsuyoshi Hirajima, Mechanisms of Catalytic Leaching of Chalcopyrite, Copper2003 International Conference, 2003.09.
81.	広吉直樹, 黒岩樹人, 三木一, 平島剛, 恒川昌美, 黄銅鉱浸出の臨界電位に及ぼす各種金属イオンの影響－黄銅鉱浸出の電位依存性に関する研究(第1報)－, 資源素材学会 2001年春季大会, 2001.03.
82.	三木一, 広吉直樹, 平島剛, 恒川昌美, 硫酸溶液中での黄銅鉱のサイクリックボルタモグラムに及ぼす各種金属イオンの影響－黄銅鉱浸出の電位依存性に関する研究(第2報)－, 資源素材学会 2001年春季大会, 2001.03.
83.	三木一, 広吉直樹, 平島剛, 恒川昌美, Fe(Ⅱ)による黄銅鉱浸出促進に関する研究(第4報) －Cu(Ⅱ)添加と電位調節の効果－, 資源素材学会2000年春季大会, 2000.03.
84.	広吉直樹, 荒井政俊, 三木一, 平島剛, 恒川昌美, 硫酸溶液中における黄銅鉱浸出の溶液電位依存性とAg(Ⅰ)の触媒作用, 資源素材学会 2000年春季大会, 2000.03.
85.	Naoki Hiroyoshi, Hajime Miki, Tsuyoshi Hirajima, Masami Tsunekawa, Ferrous Promoted Chalcopyrite Leaching, Copper1999 International Conference, 1999.09.
86.	広吉直樹, 三木一, 前田英人, 恒川昌美, 平島剛, 鉄(Ⅱ)イオンを促進剤とする黄銅鉱酸素酸化浸出の過程における鉄(Ⅲ)イオンの生成, 資源素材学会1998年春季大会, 1999.03.
87.	広吉直樹, 三木一, 平島剛, 恒川昌美, Fe(Ⅱ)による黄銅鉱浸出促進に関する研究(第1報)－Fe(Ⅲ)による黄銅鉱酸化に及ぼすFe(Ⅱ)の影響と銅の重要性, 資源素材学会1999年春季大会, 1999.03.
88.	広吉直樹, 荒井政俊, 三木一, 平島剛, 恒川昌美, Fe(Ⅱ)による黄銅鉱浸出促進に関する研究(第2報)－Fe(Ⅱ)－Cu(Ⅱ)混合溶液で前処理した黄銅鉱電極のアノード分極特性－, 資源素材学会1999年春季大会, 1999.03.
89.	広吉直樹, 三木一, 平島剛, 恒川昌美, Fe(Ⅱ)による黄銅鉱浸出促進に関する研究(第3報) －浸出促進を説明する反応モデルとその熱力学的成立条件－, 資源素材学会1999年春季大会, 1999.03.
90.	三木一, 広吉直樹, 恒川昌美, 平島剛, Fe(Ⅱ)イオンによる黄銅鉱酸化浸出の促進, 資源素材学会北海道支部春季講演会, 1997.06.
91.	Tsuyoshi Hirajima, Masanori Mori, Osamu Ichikawa, Keiko Sasaki, Hajime Miki, Mitsuru Sawada, Selective flotation of chalcopyrite and molybdenite by surface oxidation, 27th International Mineral Processing Congress, IMPC 2014, For pretreatment of selective flotation, surface oxidation of chalcopyrite and molybdenite was applied by oxygen plasma then the minerals were washed by solution at pH 9 with oxygen bubbling. Surface characteristics of these minerals were investigated with AFM, XPS, zeta potential and contact angle measurements. Contact angle of chalcopyrite and molybdenite decreased a lot by plasma treatment. When they were washed with pH 9 solution with oxygen bubbling, contact angle of molybdenite increased whereas chalcopyrite one kept low. Adhesion force measurements indicated similar behavior. Result of flotation experiments indicated low recovery of both chalcopyrite and molybdenite after plasma treatment and only molybdenite recovery became higher after washing. Selective flotation of chalcopyrite and molybdenite could be achieved with this process. Possible mechanism of selective flotation was proposed from the results of XPS, AFM, etc..
92.	Hajime Miki, Michael Nicol, Synergism in the oxidation of covellite and pyrite by iron(III) and copper(II) ions in chloride solutions, Hydrometallurgy 2008: 6th International Symposium, An electrochemical study of the cathodic reduction of copper(II) and iron(III) ions on covellite and pyrite electrode surfaces has been carried out using rotating disk electrodes in acidic chloride solutions. The results of linear sweep voltammetric measurements have revealed that reduction of copper(II) ions on both mineral surfaces can be enhanced by a typical EC'(electrochemical/chemical) or catalytic mechanism in which the product copper(I) ions, are reoxidised in a rapid chemical reaction with iron(III) ions. Fe(III) + Cu(I) ⇆ Fe(II) + Cu(II) In the case of covellite, the catalytic effect is substantial with a significant positive shift in the mixed potential in the presence of both ions. An estimate of the magnitude of the catalytic effect using conventional EC theory for a rotating disk and published data for the rate of oxidation of copper(I) by iron(III) is consistent with the observed effect. It is suggested that the effect on the leaching rate of covellite in such solutions at ambient temperatures will not be significantly affected by the presence of this catalytic process given that the mixed potentials occur in a potential region in which the rate of anodic dissolution of the mineral is largely independent of potential. The effect is less substantial in the case of pyrite and a more extensive study of the effects of varying concentrations of chloride, copper(II) and iron(III) ions has given results which are also qualitatively consistent with those predicted from the theory in that the concentration of copper(II) has a greater effect than that of iron(III) on the catalytic currents. The practical significance is expected to be minimal in the case of pyrite for which higher potentials are required than those at which copper(II) is electrochemically active..
93.	Hajime Miki, Michael Nicol, The kinetics of the copper-catalysed oxidation of iron(II) in chloride solutions, Hydrometallurgy 2008: 6th International Symposium, An alternative approach to the heap leaching of copper sulfide minerals involves the use of chloride ions as the lixiviant. The facile oxidation of copper(I) ions in a chloride system by atmospheric oxygen offers an alternative to bio-oxidation of iron(II) in the sulfate system. In the chloride system, it is well-known that both copper(II) and iron(III) ions can act as the oxidants for these minerals. However, regeneration of these species by oxidation with dissolved oxygen is required and this is possible in a sulfate system by the use of bacterially catalysed oxidation of iron(II). However, in the chloride system, re-oxidation of copper(I) and iron(II) ions can only economically be achieved by chemical reaction with dissolved oxygen. The kinetics of the reduction of dissolved oxygen by iron(II) and copper(I) in acidic chloride solutions have been previously studied with the former being considerably slower than the latter. This paper will focus on the kinetics of the copper-catalysed reaction of iron(II) with dissolved oxygen. It will be shown that this reaction can be described in terms of the rapid equilibrium Fe(II) + Cu(II) ⇆ Fe(III) + Cu(I) followed by relatively rapid auto-oxidation of copper(I). The inhibiting effect of iron(III) ions in terms of the above equilibrium is demonstrated and the effects of acidity and chloride ion concentration on the rate described. An overall kinetic model has been developed which is consistent with the published data on the individual reactions involved in this mechanism. The application of this model to the prediction of maximum possible leach rates for copper sulfide minerals in aerated systems under ambient conditions is discussed..
94.	Michael J. Nicol, Hajime Miki, Applications of the electrochemistry of fine mineral sulfides, Proceedings of the Jan D. Miller Symposium - Innovations in Natural Resource Processing, Relatively simple techniques have been developed which enable the electrochemistry of sulfide minerals to be studied with particles varying in size from above 100 μm to less than 1 μm. Both oxidative and reductive processes have been studied using the minerals pyrite, arsenopyrite and chalcopyrite. It has been shown that it is possible to completely oxidise or reduce the minerals during a single voltammetric sweep. The resulting voltammogram produces peaks which are characteristic of each mineral and can be used to qualitatively identify the minerals. In the case of chalcopyrite, it has been demonstrated that the charge involved in the anodic oxidation can be quantitatively related to the amount of copper dissolved. Quantitative information can be obtained using peak fitting techniques. Interesting differences in the behaviour of the minerals in sulfuric and hydrochloric acids have been observed, particularly in the case of pyrite for which a second major peak is obtained which has been attributed to the oxidation of elemental sulfur in the presence of chloride ions. The technique offers the possibility of providing mineralogical information of individual particles based on an electrochemical voltammetric fingerprint..
95.	Naoki Hiroyoshi, Hajime Miki, Tsuyoshi Hirajima, Masami Tsunekawa, Ferrous promoted chalcopyrite leaching, Fourth International Conference COPPER 99 - COBRE 99, It is generally accepted that ferric ions are effective for leaching chalcopyrite as an oxidant and ferrous ions contribute to the leaching only as a source of the oxidant ferric ions. However, this paper shows that ferrous ions are more useful for leaching chalcopyrite than oxidant ferric ions in sulfuric acid solutions in air at ambient temperatures. Leaching experiments and dissolved oxygen consumption measurements were carried out with a very pure chalcopyrite and 0.001 - 1 mol dm^-3 sulfuric acid solutions containing 0 - 0.1 mol dm^-3 ferric or ferrous ions at 303 K. Chalcopyrite oxidation with dissolved oxygen was promoted by ferrous ions but suppressed by ferric ions. As a result, the amount of extracted copper was larger with ferrous ions than with ferric ions. Effects of Thiobacillus ferrooxidans on the ferrous promoted chalcopyrite leaching were also investigated and discussed based on the experimental data..

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