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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(Cu S)、二硫化物(S2-2)、元素硫(S0)、多硫化物(S2-n)与硫酸盐(SO2-4)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。
X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to study the surface product changes of chalcopyrite during the extraction of M. thermophilus. The results showed that monosulfides (CuS), disulfides (S2-2), elemental sulfur (S0) and polysulfides (S2-n) were present in the leaching process of A. caldus, S. thermosulfidooxidans and L. ferriphilum, Sulfate (SO2-4) is the major product on the chalcopyrite surface. Leaching chalcopyrite at A.caldus slows down, mainly due to the incomplete dissolution of chalcopyrite to produce polysulfides, limiting further dissolution. During the leaching of chalcopyrite from S. thermosulfidooxidans and L. ferriphilum, polysulfides and jarosite are the main components of the passive film. Elemental sulfur is not a major contributor to passivation of the chalcopyrite bio-metallurgical process.