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Spatial and temporal distributions of total and methyl mercury in precipitation in core urban areas, Chongqing, China
Y. M. Wang;  D. Y. Wang;  B. Meng;  Y. L. Peng;  L. Zhao;  J. S. Zhu
2012
Source PublicationAtmospheric Chemistry and Physics
Volume12Issue:20Pages:9417-9426
Abstract

The spatial and temporal distribution patterns of mercury (Hg) in precipitation were investigated in the core urban areas of Chongqing, China. During the period from July 2010 to June 2011, total mercury (THg) and methyl mercury (MeHg) concentrations in precipitation were analysed from three sampling sites. Our results suggested that the volume-weight mean THg and MeHg concentrations in precipitation were 30.67 ng l−1 and 0.31 ng l−1, respectively. The proportion of MeHg in THg ranged from 0.1% to 7.6% with a mean value of 1.3%. THg and MeHg concentrations showed seasonal variations, while the highest THg value was measured in winter. Contrarily, the highest MeHg concentration was observed in autumn. Additionally, a geographically gradual decline of THg concentration in precipitation was observed from the downtown to the suburb, then to the controlled site in the city. 5 mm rainfall might be a threshold for the full wash-out capability. Rainfall above 5 mm may have a diluting effect for the concentrations of THg. Moreover, the current research implies that the coal combustion and motor vehicles could be the dominant sources for Hg in the precipitation.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/10957
Collection环境地球化学国家重点实验室
Affiliation1.Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment (Ministry of Education), College of Resources and Environment, Southwest University, Chongqing 400715, China
2.Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing 400716, China
3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Recommended Citation
GB/T 7714
Y. M. Wang;D. Y. Wang;B. Meng;Y. L. Peng;L. Zhao;J. S. Zhu. Spatial and temporal distributions of total and methyl mercury in precipitation in core urban areas, Chongqing, China[J]. Atmospheric Chemistry and Physics,2012,12(20):9417-9426.
APA Y. M. Wang;D. Y. Wang;B. Meng;Y. L. Peng;L. Zhao;J. S. Zhu.(2012).Spatial and temporal distributions of total and methyl mercury in precipitation in core urban areas, Chongqing, China.Atmospheric Chemistry and Physics,12(20),9417-9426.
MLA Y. M. Wang;D. Y. Wang;B. Meng;Y. L. Peng;L. Zhao;J. S. Zhu."Spatial and temporal distributions of total and methyl mercury in precipitation in core urban areas, Chongqing, China".Atmospheric Chemistry and Physics 12.20(2012):9417-9426.
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