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    
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.
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.
Institute F. -A. Forel, University of Geneva, route de Suisse 10, C.P. 416, CH-1290 Versoix, Switzerland.
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