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首页> 外文期刊>African Journal of Aquatic Science >Distribution and ecological risks of polychlorinated biphenyls (PCBs) in surface sediment of the Forcados River, Niger Delta, Nigeria
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Distribution and ecological risks of polychlorinated biphenyls (PCBs) in surface sediment of the Forcados River, Niger Delta, Nigeria

机译：尼日利亚尼日尔三角洲福卡多斯河表层沉积物中多氯联苯的分布及其生态风险

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摘要

Concentrations of sigma 15 PCBs in sediments of the Forcados River, Nigeria, were determined in 2012 to provide information on the profile, sources and ecotoxicological risks of PCBs in the sediment. The screening concentrations of PCBs were quantified using a gas chromatograph equipped with a Ni-63 electron capture detector. The concentrations of the sigma 15 PCBs ranged from 2.7 to 202.3 mu g kg-1 with a mean concentration of 46.5 mu g kg-1. The composition of PCB congeners was clearly dominated by octa-PCBs, hepta-PCBs and hexa-PCBs, constituting 68.1% to 93.7%, respectively, of the total amounts of PCBs. All sites had sigma 15 PCB levels below the prescribed probable effect concentrations, and therefore no adverse effects are expected for the majority of sediment-dwelling organisms of the Forcados River system.
机译：2012年确定了尼日利亚福卡多斯河沉积物中sigma 15多氯联苯的浓度，以提供有关沉积物中多氯联苯的概况，来源和生态毒理风险的信息。使用配备Ni-63电子捕获检测器的气相色谱仪对PCBs的筛选浓度进行定量。 sigma 15 PCB的浓度范围为2.7至202.3μg kg-1，平均浓度为46.5μg kg-1。 PCB同类物的组成显然以八氯联苯，七氯联苯和六氯联苯为主，分别占多氯联苯总量的68.1％至93.7％。所有站点的sigma 15 PCB含量均低于规定的可能影响浓度，因此，对于福卡多斯河系统的大多数沉积生物而言，预计不会产生不利影响。

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