Enormous PCBs increase in oysters from the coast of Guangdong, China

文献类型： 外文期刊

第一作者： Gan, Ju-Li

作者： Gan, Ju-Li;Jia, Xiao-Ping;Lin, Qin;Cai, Wen-Gui;Jia, Ting

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关键词： south china coastal waters oyster pcbs spatial distribution temporal trends

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）

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收录情况： SCI

摘要： PCBs equivalent to Aroclor 1242 and 1254 in soft tissues of oysters Crassostrea rivularis from the Guangdong coast, China, were measured using a GC-ECD. PCB concentrations (ng g~(-1) d.w.) ranged from 30 to 2040 with an average of 315 in 2003-2007, and 0.35-1.43 with an average of 0.56 in 1989-1991. Annual averages were 0.61, 0.65, 313, 290 and 342 ng g~(-1) respectively in 1989, 1991, 2003, 2006 and 2007. In east Guangdong, the Pearl River Estuary, and west Guangdong, regional means were 444,273,194 ng g~1, respectively in 2003-2007, and 0.43, 0.78, 0.38 ng g~(-1), respectively in 1989-1991, indicating PCB levels in oysters have risen greatly by ratios of 350-1032 compared with earlier data. PCB sources may derive from older transformers, printing materials and pressworks. Fortunately, current residual PCBs in the oysters were 0.004-0.253 mg kg~(-1) (w.w.), still below hygienic criteria of China and developed countries.

分类号： X

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