Document Detail


Mass-dependent and -independent fractionation of hg isotopes by photoreduction in aquatic systems.
MedLine Citation:
PMID:  17872409     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Mercury (Hg) isotopes can be used as tracers of Hg biogeochemical pathways in the environment. The photochemical reduction of aqueous Hg species by natural sunlight leads to both mass-dependent fractionation (MDF) of Hg isotopes and mass-independent fractionation (MIF) of the odd-mass isotopes, with the relation between the MIF for the two odd isotopes being distinct for different photoreduction pathways. Large variations in MDF and MIF are observed in fish and provide new insights into the sources and bioaccumulation of Hg in food webs. MIF in fish can also be used to estimate the loss of methylmercury via photoreduction in aquatic ecosystems.
Authors:
Bridget A Bergquist; Joel D Blum
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-09-13
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  318     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-10-19     Completed Date:  2007-11-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  417-20     Citation Subset:  -    
Affiliation:
Department of Geological Sciences, University of Michigan, 1100 North University Avenue, Ann Arbor, MI 48109, USA.
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Comments/Corrections
Comment In:
Science. 2007 Oct 19;318(5849):402-3   [PMID:  17947569 ]

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