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《Journal of Marine Sciences》 2014-04
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Distribution and ecological risk assessment of polychlorinated biphenyl in surface sediments in the dumpingsite of YongjiangEstuary,China

XU Guo-feng;JIN Yu-di;SHEN Ji-ping;Marine Environmental Monitoring Center of Ningbo,SOA;  
In order to study the level of pollution and impact on ecological environment of polychlorinated biphenyl in surface sediments in the dumping site of Yongjiang Estuary,8sites of samples were collected in the dumping site and its nearby area in January,2014.The contents of polychlorinated biphenyl were detected by agas chromatography with electron capture detector,and then the ecological risk assessment was studied.The results showed that the content range of polychlorinated biphenyl were varied from 1.310 to 6.538μg·kg-1,while the average content was 3.413μg·kg-1in surface sediments in the dumping site of Yongjiang Estuary.The distribution of polychlorinated biphenyl in northwest and southeast was higher than that in dumping site.The types of polychlorinated biphenyl found in the surface sediments were mainly PCB28,PCB118,PCB 155,and the contents of PCB118 and PCB155were in relatively high levels,accounting for 26.1%to 93.1% of the total polychlorinated biphenyl in all sites.Compared with other main estuaries,the pollution level of polychlorinated biphenyl in the dumping site of Yongjiang Estuary was lower than that in Yangtze River Estuary,Minjiang River Estuary and Pearl River Estuary,but it was higher than that in Yalu River Estuary,Liao River Estuary and Yellow River Estuary.Furthermore,the Hakanson ecological risk index method,Canadian sediment quality guidelines,ecological risk index method and toxic equivalency factors method were used to conduct an assessment of the pollution of polychlorinated biphenyl.The results were basically the same.It revealed that surface sediments from the dumping site of Yongjiang Estuary were at a lower risk,and it could not cause the negative effects of organisms.
【Fund】: 国家海洋公益性行业科研专项经费项目资助(201105010-14);; 2012中央分成海域使用金支出项目(环保类)资助(国海办字[2013]551号)
【CateGory Index】: X55;X826
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