Distribution and source apportionments of polychlorinated biphenyls (PCBs) in mariculture sediments from the Pearl River Delta, South China

Hong sheng Wang, Jun Du, Ho man Leung, Anna Oi Wah LEUNG, Peng Liang, John P. Giesy, Chris K C WONG*, Ming Hung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Surface and core sediments collected from six mariculture farms in the Pearl River Delta (PRD) were analyzed to evaluate contamination levels of polychlorinated biphenyls (PCBs). The ∑PCBs (37 congeners) concentrations ranged from 5.10 to 11.0ngg-1 (mean 7.96ngg-1) in surface and 3.19 to 22.1ngg-1 (mean 7.75ngg-1) in core sediments, respectively. The concentrations were significantly higher than that measured in the sediments of their corresponding reference sites, whereby the average enrichment percentages were 62.0% and 42.7% in surface and core sediments, respectively. Significant correlations (R2=0.77, p<0.05) of PCB homologue group proportions between fish feeds and surface mariculture sediments suggested that fish feed input was probably the main source for the enrichment of PCBs. Due to the fact that PCBs could be transferred along food chains, PCB contamination in fish feeds and mariculture sediments should not be overlooked.

Original languageEnglish
Pages (from-to)516-522
Number of pages7
JournalMarine Pollution Bulletin
Volume63
Issue number5-12
DOIs
Publication statusPublished - 2011

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Enrichment percentage
  • Fish feed
  • Mariculture
  • PCBs

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