Trophic relationships and health risk assessments of trace metals in the aquaculture pond ecosystem of Pearl River Delta, China

Zhang Cheng, Yu Bon Man, Xiang Ping Nie, Ming Hung WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2142-2148
Number of pages7
JournalChemosphere
Volume90
Issue number7
DOIs
Publication statusPublished - Feb 2013

Scopus Subject Areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

User-Defined Keywords

  • Aquaculture fish
  • Bioaccumulation
  • Biomagnification
  • Environmental assessment
  • Pearl River Delta
  • Trace metals

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