Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 102, Issue 5, Pages 621-627Publisher
SPRINGER
DOI: 10.1007/s00128-018-2523-1
Keywords
Organic matter; Methyl-mercury; Hg; Bioavailability; Microbial methylation
Categories
Funding
- National Natural Science Foundation of China [41472124]
- PetroChina Innovation Foundation [2015D-5006-0210, 2016D-5007-0702]
- Natural Science Foundation of Hubei Province [2016CFB178, 2016CFB601]
- Yangtze Youth Fund [2016cqr14]
- China Scholarship Council [201708420108, 201708420260]
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Many studies have suggested that organic matter (OM) substantially reduces the bioavailability and risks of mercury (Hg) in soils and sediments; however, recent reports have supported that OM greatly accelerates Hg methylation and increases the risks of Hg exposure. This study aims to summarize the interactions between Hg and OM in soils and sediments and improve our understanding of the effects of OM on Hg methylation. The results show that OM characteristics, promotion of the activity of Hg-methylating microbial communities, and the microbial availability of Hg accounted for the acceleration of Hg methylation which increases the risk of Hg exposure. These three key aspects were driven by multiple factors, including the types and content of OM, Hg speciation, desorption and dissolution kinetics and environmental conditions.
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