Selenium in Chinese coals: distribution,occurrence, and health impact |
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| Authors: | Lei Wang Yiwen Ju Guijian Liu Chen-Lin Chou Liugen Zheng Cuicui Qi |
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| Institution: | (1) CAS Key Laboratory of Crust-Mantle Materials and the Environment, School of Earth and Space Sciences, University of Science and Technology of China, 230026 Hefei, China;(2) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi’an, 710075, Shannxi, People’s Republic of China;(3) College of Earth Science, Graduate University of Chinese Academy of Sciences, 100049 Beijing, China;(4) Illinois State Geological Survey, Champaign, IL 61820, USA;(5) Department of Biology and Chemistry, City University of Hong Kong (CityU), 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China;(6) Advanced Laboratory of Environmental Research and Technology (ALERT), Joint Advanced Research Center, USTC-CityU, 215123 Suzhou, China; |
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| Abstract: | Selenium (Se) is one of the volatile elements in coal. During mining and utilization of coal, Se is largely released into
the environment, which influences environmental quality, and consequently impacts on human health. This paper is a review
of current knowledge on the distribution, occurrence and environmental impact of Se in Chinese coals. This study includes
the following aspects: distribution and abundance of Se in coals of different provinces of China, different coal-forming periods,
modes of occurrence of Se in coals, formation mechanism of Se in coals, migration processes and transformation of Se during
coal combustion and leaching and their environmental effects. The available data show that Se content in Chinese coals is
highly variable in different coalfields, different coal-forming periods, and different coal seams from individual coalfields.
The average Se content in Chinese coal is 3.91 mg/kg. |
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