Mass-dependent and mass-independent fractionation of mercury isotopes in precipitation from Guiyang, SW China

	Mass-dependent and mass-independent fractionation of mercury isotopes in precipitation from Guiyang, SW China
	Zhuhong Wang; Jiubin Chen; Xinbin Feng; Holger Hintelmann; Shengliu Yuan; Hongming Cai; Qiang Huang; Shuxiao Wang; Fengyang Wang
	2015
发表期刊	Comptes Rendus Geoscience
卷号	347 期号:7-8 页码:358-367
摘要	The isotopic composition of mercury (Hg) is increasingly used to constrain the sources and pathways of this metal in the atmosphere. Though China has the highest Hg production, consumption and emission in the world, Hg isotope ratios are rarely reported for Chinese wet deposition. In this study, we examined, for the first time outside North America, both mass-dependent fractionation (MDF, expressed as delta Hg-202) and mass-independent fractionation of odd (odd-MIF, Delta Hg-199) and even (even-MIF, Delta Hg-200) Hg isotopes in 15 precipitation samples collected from September 2012 to August 2013 in Guiyang (SW China). All samples displayed significant negative delta Hg-202 (-0.44 similar to-4.27 parts per thousand), positive Delta Hg-199 (+0.19 to +1.16 parts per thousand) and slightly positive Delta Hg-200 (-0.01 parts per thousand to +0.20 parts per thousand). Potential sources of Hg in precipitation were identified by coupling both MDF and MIF of Hg isotopes with a back-trajectory model. The results showed that local emission from coal-fired power plants and cement plants and western long-range transportation are two main contributing sources, while the contribution of Hg from south wind events would be very limited on an annual basis. The relatively lower Delta Hg-200 values in Guiyang precipitation may indicate a dilution effect by local sources and/or insignificant even-MIF in the tropopause contribution of this subtropical region. Our study demonstrates the usefulness of isotope fractionation, especially MIF for tracing sources and pathways of Hg in the atmosphere.
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6082
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文环境地球化学国家重点实验室
推荐引用方式 GB/T 7714	Zhuhong Wang,Jiubin Chen,Xinbin Feng,et al. Mass-dependent and mass-independent fractionation of mercury isotopes in precipitation from Guiyang, SW China[J]. Comptes Rendus Geoscience,2015,347(7-8):358-367.
APA	Zhuhong Wang.,Jiubin Chen.,Xinbin Feng.,Holger Hintelmann.,Shengliu Yuan.,...&Fengyang Wang.(2015).Mass-dependent and mass-independent fractionation of mercury isotopes in precipitation from Guiyang, SW China.Comptes Rendus Geoscience,347(7-8),358-367.
MLA	Zhuhong Wang,et al."Mass-dependent and mass-independent fractionation of mercury isotopes in precipitation from Guiyang, SW China".Comptes Rendus Geoscience 347.7-8(2015):358-367.

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