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Bio-accumulation of Methylmercury versus Inorganic Mercury in Rice (Oryza sativa L.) Grain
Zhang H;  Feng X;  Larssen T;  Shang L;  Li P
2010
Source PublicationEnvironmental Science & Technology
Volume44Issue:12Pages:4499-4504
Abstract

 

Mercury (Hg) bioaccumulation in aquatic food webs has been much studied, motivated from high Hg levels found in many fish species important for human consumption. Hg bioaccumulation in terrestrial food chains have received little attention and assumed to be of minor importance. However, recent studies showed that rice can be an important pathway of methylmercury (MeHg) exposure to inhabitants in Hg mining areas in China. In this study, 59 sampling sites (including 32 sites from "heavily polluted area", 19 from "less-impacted area" and 8 from "control sites") were selected in a Hg mining area in China and both inorganic Hg (IHg) and MeHg were determined in rice grain (brown rice) and soil samples to evaluate Hg bioaccumulation in rice grain. Bio-Accumulation Factors (BAFs) for IHg ranged from 0.00014 to 0.51 and from 0.71 to 50 for MeHg. BAFs for MeHg were on average more than 800 times higher than those for IHg (maximum: 40,000 times). This study, for the first time, showed that rice grain is an intensive bioaccumulator of MeHg, but not of IHg, which may be trapped by the roots.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8144
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.Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
3.Norwegian Institute for Water Research (NIVA), Gaustadalle´en 21, 0349 Oslo
4.Norway, and Department of Chemistry, University of Oslo
Recommended Citation
GB/T 7714
Zhang H;Feng X;Larssen T;Shang L;Li P. Bio-accumulation of Methylmercury versus Inorganic Mercury in Rice (Oryza sativa L.) Grain[J]. Environmental Science & Technology,2010,44(12):4499-4504.
APA Zhang H;Feng X;Larssen T;Shang L;Li P.(2010).Bio-accumulation of Methylmercury versus Inorganic Mercury in Rice (Oryza sativa L.) Grain.Environmental Science & Technology,44(12),4499-4504.
MLA Zhang H;Feng X;Larssen T;Shang L;Li P."Bio-accumulation of Methylmercury versus Inorganic Mercury in Rice (Oryza sativa L.) Grain".Environmental Science & Technology 44.12(2010):4499-4504.
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