中国乌达煤炭基地尘土汞分布特征

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Abstract

185 samples were collected, using a systematic sampling strategy with sampling density 3composite dust samples (about 1.5mm above the ground surface) per km² in Wuda, and total of 200 km². The mercury (Hg) concentrations of dusts were investigated using Lumex RA-915. The results showed that the dust Hg concentrations of coalfield ranged from 117 to 765ng/g with an average of 285ng/g, the value of industrial part ranged from 160 to 6453ng/g with an average of 804ng/g, the value of urban ranged from 41 to 382ng/g with an average of 160ng/g, the value of farm ranged from 16 to 198ng/g with an average of 66ng/g, and the value of industrial wasteland ranged from 3 to 284ng/g with an average of 50ng/g. Compared with the value of Wuda background and China tide soil background, the dust Hg concentrations were significantly enrichment in industrial park and coalfield. But the concentrations were lower than that of metal mining area and other urban, the reason of which was that the dusts mercury was mainly related to the relative position of coalfire, gangue and it's geographic height in coalfield, sunshine duration, dry air and surface naked in urban. The distribution of dust Hg in Wuda was significantly inhomogeneity. The Hg distribution in industrial park was affected by regional humidity increase, chemical plant using the involving mercury catalyst and regional geographical location such as relatively closed and downwind of coal-fired power plants. By the analyze of geo-accumulation index (I_geo), the results showed that the Hg pollution of industrial park was serious with 36.59% area close to heavy pollution and 7.32% very heavy pollution, the Hg pollution in coalfield was moderate with 2.27% area close to heavy pollution, other areas were lesspolluted.

Key words： Wuda coalfire dusts mercury distribution pollution

Received: 01 November 2016

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	LI Chun-hui
	LIANG Han-dong
	CHEN Yang
	BAI Jiang-wei
	CUI Yu-kun

Cite this article:

LI Chun-hui,LIANG Han-dong,CHEN Yang等. Distribution of mercury content in dusts of coal base, Wuda, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(6): 2203-2210.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I6/2203

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