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Mercury Isotope Signatures of Methylmercury in Rice Samples from the Wanshan Mercury Mining Area, China: Environmental Implications
Ping Li;  Buyun Du;  Laurence Maurice;  Laure Laffont;  Christelle Lagane;  David Point;  Jeroen E. Sonke;  Runsheng Yin;  Che-Jen Lin;  Xinbin Feng
2017
Source PublicationEnvironmental Science & Technology
Volume51Issue:21Pages:12321-12328
Abstract

Rice consumption is the primary pathway of methylmercury (MeHg) exposure for residents in mercury-mining areas of Guizhou Province, China. In this study, compound-specific stable isotope analysis (CSIA) of MeHg was performed on rice samples collected in the Wanshan mercury mining area. An enrichment of 2.25in total Hg (THg) delta Hg-202 was observed between rice and human hair, and THg Delta Hg-199 in hair was 0.12higher than the value in rice. Rice and human hair samples in this study show distinct Hg isotope signatures compared to those of fish and human hair of fish consumers collected in China and other areas. Distinct Hg isotope signatures were observed between IHg and MeHg in rice samples (in mean +/- standard deviation: delta Hg-202(IHg) at -2.30 +/- 0.49, Delta Hg-199(IHg) at -0.08 +/- 0.04, n = 7; delta Hg-202(MeHg) at -0.80 +/- 0.25, Delta Hg-199(MeHg) at 0.08 +/- 0.04, n = 7). Using a binary mixing model, it is estimated that the atmospheric Hg contributed 31% +/- 16% of IHg and 17% +/- 11% of THg in the rice samples and the IHg in soil caused by past mining activities contributed to the remaining Hg. This study demonstrated that Hg stable isotopes are good tracers of human MeHg exposure to fish and rice consumption, and the isotope data can be used for identifying the sources of IHg and MeHg in rice.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8015
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Observatory Midi-Pyrénées, Geosciences Environment Toulouse Laboratory, Research Institute for the Development (IRD), University of Toulouse and CNRS, 31400 Toulouse, France
5.Center for Advances in Water and Air Quality, Lamar University, Beaumont, Texas 77710, United States
Recommended Citation
GB/T 7714
Ping Li;Buyun Du;Laurence Maurice;Laure Laffont;Christelle Lagane;David Point;Jeroen E. Sonke;Runsheng Yin;Che-Jen Lin;Xinbin Feng. Mercury Isotope Signatures of Methylmercury in Rice Samples from the Wanshan Mercury Mining Area, China: Environmental Implications[J]. Environmental Science & Technology,2017,51(21):12321-12328.
APA Ping Li;Buyun Du;Laurence Maurice;Laure Laffont;Christelle Lagane;David Point;Jeroen E. Sonke;Runsheng Yin;Che-Jen Lin;Xinbin Feng.(2017).Mercury Isotope Signatures of Methylmercury in Rice Samples from the Wanshan Mercury Mining Area, China: Environmental Implications.Environmental Science & Technology,51(21),12321-12328.
MLA Ping Li;Buyun Du;Laurence Maurice;Laure Laffont;Christelle Lagane;David Point;Jeroen E. Sonke;Runsheng Yin;Che-Jen Lin;Xinbin Feng."Mercury Isotope Signatures of Methylmercury in Rice Samples from the Wanshan Mercury Mining Area, China: Environmental Implications".Environmental Science & Technology 51.21(2017):12321-12328.
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