DOI: 10.1016/j.scitotenv.2020.136827
论文题名: Understanding mercury methylation in the changing environment: Recent advances in assessing microbial methylators and mercury bioavailability
作者: Tang W.-L. ; Liu Y.-R. ; Guan W.-Y. ; Zhong H. ; Qu X.-M. ; Zhang T.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 714 语种: 英语
英文关键词: Mercury bioavailability
; Mercury methylation
; Methylmercury
; Microbial methylators
Scopus关键词: Agriculture
; Alkylation
; Bacteria
; Biochemistry
; Chemical speciation
; Climate change
; Health risks
; Mercury compounds
; Sulfur compounds
; Environmental conditions
; Global climate changes
; Mercury methylation
; Methyl mercury
; Microbial methylators
; Natural aquatic environments
; Sulfate reducing bacteria
; Sustainable agriculture
; Methylation
; biological marker
; mercury
; tracer
; bioavailability
; biomarker
; climate change
; mercury (element)
; methylation
; methylmercury
; microbial community
; paddy field
; polar region
; speciation (chemistry)
; aquatic environment
; Article
; bioavailability
; environmental change
; gene
; geochemistry
; hgcAB gene
; methanogen
; methylation
; microbial activity
; microbial community
; microbial diversity
; molecular stability
; nonhuman
; prediction
; priority journal
; soil chemistry
; species habitat
; sulfate reducing bacterium
; water pollution
; whole cell biosensor
; Bacteria (microorganisms)
英文摘要: Methylmercury (MeHg) is a neurotoxin, mainly derived from microbial mercury methylation in natural aquatic environments, and poses threats to human health. Polar regions and paddy soils are potential hotspots of mercury methylation and represent environmental settings that are susceptible to natural and anthropogenic perturbations. The effects of changing environmental conditions on the methylating microorganisms and mercury speciation due to global climate change and farming practices aimed for sustainable agriculture were discussed for polar regions and paddy soils, respectively. To better understand and predict microbial mercury methylation in the changing environment, we synthesized current understanding of how to effectively identify active mercury methylators and assess the bioavailability of different mercury species for methylation. The application of biomarkers based on the hgcAB genes have demonstrated the occurrence of potential mercury methylators, such as sulfate-reducing bacteria, iron-reducing bacteria, methanogen and syntrophs, in a diverse variety of microbial habitats. Advanced techniques, such as enriched stable isotope tracers, whole-cell biosensor and diffusive gradient thin film (DGT) have shown great promises in quantitatively assessing mercury availability to microbial methylators. Improved understanding of the complex structure of microbial communities consisting mercury methylators and non-methylators, chemical speciation of inorganic mercury under geochemically relevant conditions, and the pathway of cellular mercury uptake will undoubtedly facilitate accurate assessment and prediction of in situ microbial mercury methylation. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158350
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan, 430070, China; College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China; Environmental and Life Science Program (EnLS), Trent University, Peterborough, Ontario K9L 0G2, Canada; College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
Recommended Citation:
Tang W.-L.,Liu Y.-R.,Guan W.-Y.,et al. Understanding mercury methylation in the changing environment: Recent advances in assessing microbial methylators and mercury bioavailability[J]. Science of the Total Environment,2020-01-01,714