有机氯农药在粤西海域沉积物和生物体中的累积研究

doi:10.11978/j.issn.1009-5470.2010.03.114

Abstract

Abstract:

Levels and profiles of DDTs and HCHs in fish, shrimp, snail and sediments in the western coastal waters of Guangdong province are discussed in this paper. The total concentrations of DDTs and HCHs in sediments were 9.06ng•g-1 and 4.77ng•g-1, respectively. γ-HCH in sediments was not detected; β-HCH and δ-HCH accounted for a large proportion, in-dicating that there was no current import of fresh HCHs into the western coastal waters of Guangdong province. High value of (DDD+DDE)/T-DDT (0.97) in sediments suggested that there was no current import of fresh DDT into the area. The total concentrations of DDTs and HCHs in biota were 0.60-18.40ng•g-1 and 0.84-14.90ng•g-1, respectively. The main forms of HCHs were α-HCH (73.96% in Apogon cyanosoma and 100% in Penaeus japonicus), γ-HCH (66.10% in Brachirus swinhois), β-HCH (57.14% in Penaeus monodon) and δ-HCH (61.48% in Thais clavigera). This reflects different ways of bioaccumula-tion of HCHs among organisms. The (DDD+DDE) percentage of Thais clavigera, Apogon cyanosoma, Penaeus monodon, Penaeus japonicus and Brachirus swinhonis made up 100%, 100%, 91.5%, 91.4%, 60.5% of total DDTs. This indicates that DDT might be effectively biodegraded by organisms. Though none of the contents of DDT and HCH in various organisms exceeds the tolerable daily intake proposed by the World Health Organization, more attention should be paid to the potential risks of co-toxicity of various toxins to human health.

Key words: organochlorine pesticides, western coastal waters of Guangdong province, sediment, biota, speciation of congener

SHI Zhen,ZHANG Da-wen,HUANG Xiao-ping,WANG Fei,. Bioaccumulation of organochlorine pesticides in organisms and sediments in the western coastal waters of Guangdong province[J].Journal of Tropical Oceanography, 2010, 29(3): 114-119.

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Bioaccumulation of organochlorine pesticides in organisms and sediments in the western coastal waters of Guangdong province

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