文献类型： 外文期刊
作者： Gan, Ju-Li 1 ; Jia, Xiao-Ping 1 ; Jia, Ting 2 ; Lin, Qin 1 ; Cai, Wen-Gui 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： 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.
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