【摘要】 研究了钱塘江富阳-杭州段10个采样点表层沉积物中7种指示性PCBs的含量分布。结果表明,钱塘江富阳-杭州段沉积物中7种常见多氯联苯同系物PCB28、52、101、118、138、153和180均有检出,其中含量最高的同系物为PCB118。7种指示性PCB总量变化范围为2.78μg/kg～16.54μg/kg,平均值为7.29μg/kg。最大值出现在灵桥(D3)南岸,最小值则在九溪水厂(D5)南岸。沉积物PCB118、52和28与其有机碳含量成极显著正相关,说明重污染河段存在含PCBs工业废水的点源输入。根据沉积物有关风险评价标准,钱塘江富阳段沉积物存在潜在生态风险。更多还原

【Abstract】 The paper investigated the distribution of seven indicative polychlorinated biphenyls(PCBs)in the surface sediments from 10 samples of Fuyang-Hangzhou section,Qiantang River.It was shown that most of PCBs for seven indicative congeners(PCB28,101,118,138,153,180) were detectable in the sediment samples and the concentration of PCB118 was the highest.Total concentration of seven PCB congeners varied from 2.78 to 16.54 μg/kg,with the average concentration of 7.29 μg/kg.The highest concentration of PCBs was found in the south of Lingqiao(D3)and the lowest in the south of Jiuxi waterworks(D5).Prominent correlation between PCB congeners such as PCB118,PCB52 and PCB28 and total organic carbon suggested that at the serious pollution section there is the point source of PCBs from the industrial discharge.Based on the sediment risk criteria,it is necessary that potential hazard risk assessment in sediments of Fuyang section of Qiantang River be further made.更多还原