Journal
CHEMOSPHERE
Volume 90, Issue 7, Pages 2142-2148Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2012.11.017
Keywords
Trace metals; Environmental assessment; Bioaccumulation; Biomagnification; Aquaculture fish; Pearl River Delta
Categories
Funding
- Environmental and Conservation Fund [37/2009]
- Special Equipment Grant (SEG) of the Hong Kong Research Grants Council [HKBU 09]
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Cadmium, lead, zinc, Chromium, copper, nickel and manganese in sediments and in aquatic organisms were collected from the aquaculture pond ecosystem of the Pearl River Delta (PRD), China and analyzed to evaluate bioaccumulation and trophic transfer in food chains, as well as the potential health risk of exposure to the Hong Kong residents via dietary intake of these aquatic products. The results revealed that based on the biota-sediment accumulation factor, omnivorous fish and zooplankton accumulated more trace metals from sediment than carnivorous fish. Concentrations of seven trace metals in aquaculture pond of PRD significantly decreased with increasing trophic levels, showing that these trace metals were trophically diluted in predatory and omnivorous food chains. The hazard index values of all fish species were smaller than 1 for adults and children, indicating there was no health risk from the multiple metals via ingestion of the freshwater fish for the inhabitants. (C) 2012 Elsevier Ltd. All rights reserved.
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