The use of sequential extraction to determine the distribution and modes of occurrence of mercury in Permian Huaibei coal, Anhui Province, China

Liugen ZHENG, Guijian LIU, Cuicui QI, Ying ZHANG, Ming Hung WONG

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80 Citations (Scopus)

Abstract

Sequential extraction tests using a Flow Injection Mercury System (FIMS) were done on 34 samples collected from the number 3, 4, 5, 7, and 10 coal seams in the Huaibei Coalfield; average total mercury (Hg) concentrations for the seams were 0.13, 0.18, 0.54, 0.34, and 0.19 mg/kg respectively. The average value for all of the coal samples was 0.26 mg/kg, which is higher than most Chinese and U.S. coals. Six modes of Hg occurrence were recognized, including: water-leachable, ion-exchangeable, organic-bound, carbonate-bound, silicate-bound, and sulfide-bound Hg. With rare exception, little Hg was found in water-soluble, ion-exchangeable or carbonate-bound forms. Sulfide-bound Hg and organic-bound Hg dominated seams 3, 4, and 10, whereas silicate-bound Hg dominated seams 5 and 7. The relatively high Hg values observed in seams 5 and 7, especially in parting samples, are attributed to Hg enrichment by magmatic intrusions. Copyright © 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)139-155
JournalInternational Journal of Coal Geology
Volume73
Issue number2
DOIs
Publication statusPublished - Jan 2008

Citation

Zheng, L., Liu, G., Qi, C., Zhang, Y., & Wong, M. (2008). The use of sequential extraction to determine the distribution and modes of occurrence of mercury in Permian Huaibei coal, Anhui Province, China. International Journal of Coal Geology, 73(2), 139-155. doi: 10.1016/j.coal.2007.04.001

Keywords

  • Mercury (Hg)
  • Modes of occurrence
  • Sequential extraction tests
  • Coal
  • Huaibei Coalfield

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