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Chemical Composition and Structure of Oxidation Product Layer on the Carrollite Surface during Bioleaching

  • Mineral Processing of Nonferrous Metals
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Abstract

The chemical composition and structure variation law of the oxidation product layer, which formed on the surface of carrollite during bioleaching, were studied by the means of SEM, XPS and EDS in this paper. It was demonstrated that an oxidation product layer formed on the mineral surface when the oxidation product adhered gradually increased. Initially, the layer mainly was composed by jarosite and sulfite, and the layer thickness was less than 2 μm. Additionally, the structure of layer was loose and pocket, and covered the partial mineral surface. In the middle stage, the layer was composed of elemental sulfur, jarosite and sulfite. Moreover, the structure of the layer became compact, and the surface of carrollite was completely coated by the layer. Lastly, the element sulfur containing in the layer was totally oxidized, thus the layer was mainly composed of jarosite. Meanwhile, the layer thickness had a tendency to continue to increase, and the layer thicknesses can reach over 6 μm.

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Authors and Affiliations

  1. School of Mining Engieering Liaoning Shihua University, Fushun, 113001, China

    Wei Liu, Shu-jiang Zhang, Feng Sun & Chang Liu

  2. Sinopec Research Institute of Safety Engineering, Qingdao, 266000, China

    Bing-bing Sun

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  1. Wei Liu
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  2. Bing-bing Sun
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  4. Feng Sun
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Correspondence to Wei Liu.

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Liu, W., Sun, Bb., Zhang, Sj. et al. Chemical Composition and Structure of Oxidation Product Layer on the Carrollite Surface during Bioleaching. Russ. J. Non-ferrous Metals 58, 568–578 (2017). https://doi.org/10.3103/S1067821217060050

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  • DOI: https://doi.org/10.3103/S1067821217060050

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