云贵川交界区晚二叠世煤中汞形态分析

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Abstract

The Late Permian coal samples were collected from the border area of Yunnan, Guizhou and Sichuan provinces to analyze the mercury release behavior in the different atmospheres (argon, nitrogen and pure oxygen) and the mercury speciations in coal, using RA-915 mercury analyzer combined with temperature programmed pyrolysis instrument. The results showed that when the coal was pyrolyzed in the reducing environment, the release range of mercury was wider, and it showed obvious stage release characteristics due to the multiple mercury speciations. In the nitrogen and argon atmosphere, the mercury release behavior was nearly uniform. When the coal was pyrolyzed in the oxygen atmosphere, HgS, HgSO₄ and HgO may be released in the transitional forms of HgSO₄·HgO and HgSO₄·2HgO, and the mercury release range was relatively concentrated. The mercury speciations in the Late Permian coal from the study area is dominated by HgS and HgSO₄, and a certain amount of HgO is present in some coal samples.

Key words： the border area of Yunnan, Guizhou and Sichuan Late Permian coal mercury speciations temperature programmed desorption

Received: 07 February 2019

PACS:	TQ533
	P599

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	Articles by authors
	CAO Qing-yi
	LIANG Han-dong
	LI Chun-hui
	YANG Liu

Cite this article:

CAO Qing-yi,LIANG Han-dong,LI Chun-hui等. Analysis of mercury speciations in Late Permian coal from the border area of Yunnan, Guizhou and Sichuan provinces[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(9): 3959-3966.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I9/3959

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