中南大学学报（英文版）
中南大學學報（英文版）
중남대학학보（영문판）
Journal of Central South University
2015年
10期
3751-3759
,共9页
顾帼华%熊先学%胡可婷%李双棵%王重庆
顧幗華%熊先學%鬍可婷%李雙棵%王重慶
고귁화%웅선학%호가정%리쌍과%왕중경
chalcopyrite%Acidianus manzaensis%Leptospirillum ferriphilum%bioleaching%electrochemistry
Chalcopyrite dissolution was evaluated by bioleaching and electrochemical experiments with thermophileA. manzaensis (Acidianus manzaensis) and mesophileL. ferriphilum (Leptospirillum ferriphium) cultures at 65 °C and 40 °C, respectively. It was investigated that the bioleaching of chalcopyrite was stepwise. It was reduced to Cu2S at a lower redox potential locating in the whole bioleaching process byA. manzaensisat high temperature while only at initial days of bioleaching byL. ferriphilum at a relative low temperature. No reduced product was detected when the redox potential was beyond a high level (e.g., 550 mV (vs SCE)) bioleached byL. ferriphilum. Chalcopyrite bioleaching efficiency was substantially improved bioleached byA. manaensis compared to that byL. ferriphilum, which was mainly attributed to the reduction reaction occurring during bioleaching. The reductive intermediate Cu2S was more amenable to oxidation than chalcopyrite, causing enhanced copper extraction.
