Document Detail


Insights into low fish mercury bioaccumulation in a mercury-contaminated reservoir, Guizhou, China.
MedLine Citation:
PMID:  22035933     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We examined Hg biogeochemistry in Baihua Reservoir, a system affected by industrial wastewater containing mercury (Hg). As expected, we found high levels of total Hg (THg, 664-7421 ng g(-1)) and monomethylmercury (MMHg, 3-21 ng g(-1)) in the surface sediments (0-10 cm). In the water column, both THg and MMHg showed strong vertical variations with higher concentrations in the anoxic layer (>4m) than in the oxic layer (0-4 m), which was most pronounced for the dissolved MMHg (p < 0.001). However, mercury levels in biota samples (mostly cyprinid fish) were one order of magnitude lower than common regulatory values (i.e. 0.3-0.5 mg kg(-1)) for human consumption. We identified three main reasons to explain the low fish Hg bioaccumulation: disconnection of the aquatic food web from the high MMHg zone, simple food web structures, and biodilution effect at the base of the food chain in this eutrophic reservoir.
Authors:
Bian Liu; Haiyu Yan; Cuiping Wang; Qiuhua Li; Stéphane Guédron; Jorge E Spangenberg; Xinbin Feng; Janusz Dominik
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Publication Detail:
Type:  Journal Article     Date:  2011-10-14
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  160     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2011-10-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  109-17     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Affiliation:
Institute F. -A. Forel, University of Geneva, route de Suisse 10, C.P. 416, CH-1290 Versoix, Switzerland.
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