Modes of occurrence of mercury in coals from Guizhou, People's Republic of China

被引:92
作者
Feng, X [1 ]
Hong, Y [1 ]
机构
[1] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
关键词
mercury; coal; modes of occurrence;
D O I
10.1016/S0016-2361(99)00077-0
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The modes of occurrence of mercury in coals from Guizhou, P.R. China were investigated using sequential extraction procedures and density separation experiments. The sequential extraction tests were carried out using 32 coals sampled from the Longtan Group of the Permian system in Guizhou Province. Eight coal samples collected from the same area were divided into 10 density fractions between < 1.4 and > 2.8 g/cm(3) by separation in a heavy-liquid mixture. Combining the results of mineral transformation and of the amount of mercury leached during the leaching experiments with the results of the correlation between mercury and mineral phases and organic matter from density separation experiments, the authors concluded that mercury in the coals examined mainly exists in pyrite. The studies also showed that most of mercury in these coals can be brought into the environment easily by acid mine drainage. It is inferred that a rather large part of Hg in coals from Guizhou may be removed by using conventional coal cleaning techniques. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1181 / 1188
页数:8
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