Distribution and change of DDT and HCH levels in oysters (Crassostrea rivularis) from coast of Guangdong, China between 2003 and 2007
文献类型： 外文期刊
作者： Gan, Ju L. 1 ; Jia, Xiao P. 1 ; Jia, Ting 2 ; Lin, Qin 1 ; Cai, Wen G. 1 ;
作者机构： 1.Chinese Acad Fishery Sci, S China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China
2.Cornell Univ, Weill Grad Sch, New York, NY 10021 USA
关键词： Oyster tissue;HCHs;DDTs;recent trend;geographical distribution
期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES （ 影响因子：1.99； 五年影响因子：2.116 ）
ISSN： 0360-1234
年卷期： 2009 年 44 卷 8 期
页码：
收录情况： SCI
摘要： This investigation was undertaken to understand the temporal trend, the spatial distribution and the residue level of dichlorodiphenyl-trichloroethanes (DDTs) and hexachlorobenzenes(HCHs) in bivalves from the coast of the South China in recent years. Jinjiang oysters (Crassostrea rivularis) were sampled from 15 bays along the coast of Guangdong province, China between 2003 and 2007. Gas chromatography with electron capture detector was used to quantify the contents of HCH isomers (alpha-, beta-, gamma-, delta-HCH), DDT isomers (p, p'-, o, p'-DDT), p,p'-DDD and p, p'-DDE in the oyster tissues. The results demonstrate that annual level of DDTs in the tissue increase throughout the study, particularly between 2004 and 2006. The DDTs content in the tissue varied significantly among sampling regions and some sampling sites (p < 0.05). On the other hand, the HCHs content was significantly lower than DDTs content in the tissue (p < 0.01), and remain constant among sampling years, sampling regions and sampling sites (p > 0.10). Predominance of isomer form of DDTs and higher ratio of gamma-HCH/HCHs at some sites indicated that recent input of DDT and lindane in the coastal waters of Guangdong, which might be caused by dicofol spraying in crop planting and lacquer painting on fisher boat. In the soft tissues of the oysters, the highest content of HCHs was 1.21 ng/g (wet weight), and DDTs levels ranged from 0.11 ng/g to 76.3 ng/g (wet weight), far below the Maximum Residual Limits in China and many developed nations.
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