Abstract
To analyze and evaluate the status of organochlorine pollutants in the Changjiang (Yangtze River) estuary and adjacent waters, the concentrations of hexachlorocyclohexane (HCHs) and dichlorodiphenyltrichloroethane (DDTs) in shellfish collected in study area from 2006 to 2007 were determined with gas chromatography (GC). The concentration range of HCHs was (ND-12.13)×10−3 mg/kg wet weight and averaged at 0.54×10−3 mg/kg while the concentration of DDTs was in the range of (4.06–281.73) ×10−3 mg/kg with a mean of 57.52×10−3 mg/kg in the survey areas. The concentrations of DDTs in the shellfish were higher than HCHs’, so that DDTs could be considered as typical organochlorine pollutants in the areas. The concentrations of DDTs in the shellfish were higher than HCHs’, so that DDTs could be considered as typical organochlorines pollutants. The HCHs in all the shellfish conformed to the first level of criterion (0.02 mg/kg) of the Marion Biology Quality (GB 18421-2001), and that of DDTs in most samples were beyond the first level (0.01 mg/kg) but conformed to the second level (0.10 mg/kg). On average, α-HCH and δ-HCH occupied the most part of HCHs, while O,P’-DDT and P,P’-DDT occupied the most part of DDTs. The concentrations of organocholorine pesticides in shellfish samples varied in site and in species. The highest level occurred at the Shengsi (SS), followed by Yangkougang (YKG), Lvsi (LS), Dongyuan (DY) and Beibayao (BBY), low concentrations were observed at Changsha (CS), Beidaodi (BDD), and Gouqi (GQ). The concentration of HCHs and DDTs in most sites decreased clearly from 2006 to 2007 except for YKG, DY, BDD, LYS, and SS. All of above results suggested that the study area was slightly affected by organochlorine pesticide, special by DDTs.
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Supported by Research Project of Public Welfare, Ministry of Science and Technology of China (2005DIB3J021)
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Ma, J., Shen, X., Yuan, Q. et al. Concentrations and distribution of organochlorine pesticides in shellfish from Changjiang estuary. Chin. J. Ocean. Limnol. 26, 388–393 (2008). https://doi.org/10.1007/s00343-008-0388-6
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DOI: https://doi.org/10.1007/s00343-008-0388-6