CAJ | 학술논문

采用X射线衍射(XRD)与X射线光电子能谱(XPS)研究黄铜矿在中度嗜热菌浸出过程中的表面产物变化。结果表明，在A. caldus,S. thermosulfidooxidans与L. ferriphilum浸出过程中，一硫化物(CuS)、二硫化物(S22?)、元素硫(S0)、多硫化物(Sn2?)与硫酸盐(SO42?)是黄铜矿表面的主要产物。在A. caldus浸出黄铜矿过程速率较慢，这主要是由于黄铜矿的不完全溶解产生多硫化物，限制了进一步的溶解。在S. thermosulfidooxidans与L. ferriphilum浸出黄铜矿过程中，多硫化物与黄钾铁矾是钝化膜的主要成分。元素硫不是导致黄铜矿生物冶金过程钝化的主要物质。
채용X사선연사(XRD)여X사선광전자능보(XPS)연구황동광재중도기열균침출과정중적표면산물변화。결과표명，재A. caldus,S. thermosulfidooxidans여L. ferriphilum침출과정중，일류화물(CuS)、이류화물(S22?)、원소류(S0)、다류화물(Sn2?)여류산염(SO42?)시황동광표면적주요산물。재A. caldus침출황동광과정속솔교만，저주요시유우황동광적불완전용해산생다류화물，한제료진일보적용해。재S. thermosulfidooxidans여L. ferriphilum침출황동광과정중，다류화물여황갑철반시둔화막적주요성분。원소류불시도치황동광생물야금과정둔화적주요물질。
X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses were carried out to investigate the surface species and interfacial reactions during bioleaching of chalcopyrite by different strains of moderately thermophilic bacteria (45 °C). Results show that monosulfide (CuS), disulfide (S22?), polysulfide (Sn2?), elemental sulfur (S0) and sulfate (SO42?) are the main intermediate species on the surface of chalcopyrite during bioleaching byA. caldus,S. thermosulfidooxidans andL. ferriphilum. The low kinetics of dissolution of chalcopyrite inA. caldus can be mainly attributed to the incomplete dissolution of chalcopyrite and the passivation layer of polysulfide. Polysulfide and jarosite should be mainly responsible for the passivation of chalcopyrite in bioleaching byL. ferriphilumorS. thermosulfidooxidans. However, elemental sulfur should not be the main composition of passivation layer of chalcopyrite during bioleaching.