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Preliminary study on the mode of occurrence of arsenic in high arsenic coals from southwest Guizhou Province

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Abstract

Coal samples from high arsenic coal areas have been analyzed by electron micropbe analyzer (EMPA), scanning electron microscopy with an energy dispersive X-ray analyzer (SEM-EDX), X-ray diffinction analysis (XRD), low temperature ashing (LTA), transmission electron microscopy (TEM), X-ray absorption fine structure (XAFS), instnunent neutron activation analysis (INAA) and wet chemical analysis. Although some As-bearing minerals such as pyrite, arsenopyrite, realgar (?), As-bearing sulfate, and As-bearing clays are found in the high arsenic coals, their contents do not account for the abundance of arsenic in the some coals. Analysis of the coal indicates that arsenic exists mainly in the form of As 5+ and As 3+, combined with compounds in the organic matrix. The occurrence of such exceptionally high arsenic contents in coal and the fact that the arsenic is dominantly organically associated are unique observations. The modes of occurrence of arsenic in high As-coals are discussed.

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Authors and Affiliations

  1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002, Guiyang, China

    Zhenhua Ding, Baoshan Zheng & Jie Zhang

  2. U.S. Geological Survey, 956 National Center, 20192, Reston V.A., USA

    H. E. Belkin & R. B. Finkelman

  3. Beijing Graduate School, China University of Mining & Technology, 100083, Beijing, China

    Fenghua Zhao

  4. Sanitation and Anti-epidemic Station in Qianxinan Autonomous Prefecture of Guizhou Province, 562400, Xingyi, China

    Daixing Zhou & Yunshu Zhou

  5. Administration of Gold in Qianxinan Autonomous Prefecture of Guizhou Province, 562400, Xingyi, China

    Chaogang Chen

Authors
  1. Zhenhua Ding
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  2. Baoshan Zheng
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  3. Jie Zhang
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  4. H. E. Belkin
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  5. R. B. Finkelman
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  6. Fenghua Zhao
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  7. Daixing Zhou
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  8. Yunshu Zhou
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  9. Chaogang Chen
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Additional information

Project supported by the National Natural Science Foundation of China (Grant Nos. 49273189, 49873007), Key Roject of the Chinese Academy of Sciences, the Education Foundation of Sir Wang Kuan-Cheng (Hong Kong), and the Venture Capitol Foundation (U.S.Geological Survey).

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Ding, Z., Zheng, B., Zhang, J. et al. Preliminary study on the mode of occurrence of arsenic in high arsenic coals from southwest Guizhou Province. Sci. China Ser. D-Earth Sci. 42, 655–661 (1999). https://doi.org/10.1007/BF02877793

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  • DOI: https://doi.org/10.1007/BF02877793

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