Abstract
The concentration ranges of As and Sb in six Late Permian high-arsenic coals collected from Xingren and Xingyi, Guizhou Province are 94.1 μg · g-1-3.2% and 8.1 μg · g-1-120 μg · g-1, respectively. Based on the mineralogical analysis, no arsenic and arsenic-bearing minerals are detected in these samples and arsenic occurs in coal macerals. By extended X-ray absorption fine structure(EX-AFS) spectroscopy, we have found that arsenic in these high-arsenic coal samples coordinates with oxygen; the coordination number of As with oxygen for these samples is 4 except one sample(H9) for which the coordination number of As is 3. Therefore, arsenic in these high-arsenic coals does not occur in sulfide minerals, but occurs in arsenate or arsenite phase, and the preponderance of As is in arsenate of As5+.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Huffman, G. P., Hugging, F. E., Shal, N., XAFS spectroscopy of critical elements in coal and coal derivatives,Advances in Coal Spectroscopy (ed. Meuzelaar, H. L. C.), New York: Plenum Press, 1992, 29–47.
Huffman, G. P., Huggins, F. E., Shal, N.et al., Speciation of arsenic and chromium in coal and combustion ash by XAFS spectroscopy,Fuel Processing Technology, 1994, 39: 47.
Huggins, F. E., Huffman, G. P., Modes of occurrence of trace elements in coal from XAFS spectroscopy,Inter. Jour. of Coal Geology, 1996, 32: 31.
Author information
Authors and Affiliations
About this article
Cite this article
Zhao, F., Ren, D., Zheng, B. et al. Modes of occurrence of arsenic in high-arsenic coal by extended X-ray absorption fine structure spectroscopy. Chin. Sci. Bull. 43, 1660–1663 (1998). https://doi.org/10.1007/BF02883414
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02883414