Gold Dissolution from ore with iodide-oxidising bacteria

San Yee Khaing, Yuichi Sugai, Kyuro Sasaki

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Gold leaching from ore using iodide-iodine mixtures is an alternative to gold cyanidation. This study evaluated the ability of iodide-oxidising bacteria to solubilise gold from ore that was mainly composed of gold, pyrite, galena, and chalcopyrite. Eight bacterial strains were successfully isolated from brine. Those strains were incubated in a liquid culture medium containing ore with a gold content of 0.26 wt.% and pulp density of 3.3 w/v% to evaluate their abilities to mediate the dissolution of gold. The gold was solubilised completely within 30 days of incubation in the iodine-iodide lixiviant solution generated by three bacterial strains. One strain, in particular, completed the dissolution of gold within 5 days of incubation and was identified as a member of the genus Roseovarius. Thus, the possibility of bacterial gold leaching using iodide-oxidising bacteria was successfully demonstrated. Bioleaching gold with iodide would likely be more environmentally sustainable than traditional cyanide leaching. Further research is required to evaluate the techno-economic feasibility of this approach.

元の言語英語
記事番号4178
ジャーナルScientific reports
9
発行部数1
DOI
出版物ステータス出版済み - 3 12 2019

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Iodides
Gold
Bacteria
Iodine
Cyanides
Culture Media
Economics

All Science Journal Classification (ASJC) codes

  • General

これを引用

Gold Dissolution from ore with iodide-oxidising bacteria. / Khaing, San Yee; Sugai, Yuichi; Sasaki, Kyuro.

:: Scientific reports, 巻 9, 番号 1, 4178, 12.03.2019.

研究成果: ジャーナルへの寄稿記事

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