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太湖背角无齿蚌中多氯联苯的残留

Keywords: 背角无齿蚌,多氯联苯,太湖,残留,生物积累

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Abstract:

作为建立淡水“贝类观察”体系的初步尝试,本研究以2003—2005年间采自太湖5个地点:无锡五里湖和三山岛,浙江湖州,常州雪堰,宜兴大浦的背角无齿蚌(Anodontawoodiana)为对象,测定了其体内37种多氯联苯(PCBs)化合物的浓度。结果显示,大部分样本能够明显检出PCB残留,检出率为95%。总多氯联苯(ΣPCB)含量在0.68~58.09ng·g-1湿重之间。各样点间蚌的总PCB含量无明显差异。PCB11、1和5在大多数样本中为优势组分,太湖周围的工业污染可能是其主要来源;同时,其累积类型异于所报道的太湖水域的夜鹭卵、沉积物和其他样本的研究结果。本研究中背角无齿蚌的PCBs残留量低于国内外相关的食品卫生标准。

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