The residual dynamic of polycyclic aromatic hydrocarbons and organochlorine pesticides in fishponds of the Pearl River delta, South China

K. Y. KONG, K. C. CHEUNG, C. K. C. WONG, Ming Hung WONG

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Abstract

Hong Kong and South China are the most developed regions within China. The industrialization in these areas has resulted in severe environmental problems. Sediment and biotic samples including tilapia (Oreochromis mossambicus), bighead carp (Aristichthys nobilis), grass carp (Ctenopharyngodon idellus), crucian carp (Carassius auratus) and mandarin fish/fresh water grouper (Siniperca chuatsi) were collected from different fishponds in the Pearl River Delta (Tanzhou, Sanjiao, Guangzhou, Shipai, Changan and Mai Po) for the analysis of polycyclic aromatic hydrocarbons (PAHs) and organochlorine (OC) pesticides. Mandarin fish, which belongs to the highest trophic level, accumulated the highest concentrations of PAHs and DDTs among all fish species. The levels of DDTs in fish samples ranged from 1.5 to 62 ng g⁻¹ (wet wt.), with more than 30% of the fish samples exceeding the limit of 14.4 ng g⁻¹ (wet wt.) for human consumption recommended by US EPA (2000). Levels of PAHs in fish samples ranged from 1.91 to 224.03 ng g⁻¹ (wet wt.), but the potency-weighted total concentrations of PAHs in all muscle tissues were below the guideline value of 0.67 ng g⁻¹ (wet wt.) for human consumption set by US EPA (2000). The guideline value calculated was based on a tissue consumption rate of 142.2 g day⁻¹ (4-5 meals per week), which is a more protective rate for populations with a high consumption of fish, like Chinese and Asians. The effect of lipid content in PAHs and DDTs accumulation in fish tissue was not significant in general. Copyright © 2005 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1831-1843
JournalWater Research
Volume39
Issue number9
DOIs
Publication statusPublished - May 2005

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Polycyclic aromatic hydrocarbons
Pesticides
Fish
PAH
Rivers
fish
river
DDT
Tissue
organochlorine pesticide
industrialization
trophic level
Lipids
Muscle
Sediments
muscle
lipid
grass
consumption
sediment

Citation

Kong, K. Y., Cheung, K. C., Wong, C. K. C., & Wong, M. H. (2005). The residual dynamic of polycyclic aromatic hydrocarbons and organochlorine pesticides in fishponds of the Pearl River delta, South China. Water Research, 39(9), 1831-1843. doi: 10.1016/j.watres.2005.02.011

Keywords

  • Hong Kong
  • Mai Po marshes
  • POPs
  • Polycyclic aromatic hydrocarbons
  • Chlorinated hydrocarbons
  • DDTs
  • Freshwater fish
  • Sediment