Distribution and ecological risk assessment of polychlorinated biphenyl in surface sediments in the dumping site of Yongjiang Estuary, China

XU Guo-feng, JIN Yu-di, SHEN Ji-ping

Journal of Marine Sciences ›› 2014, Vol. 32 ›› Issue (4) : 76-82.

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Journal of Marine Sciences ›› 2014, Vol. 32 ›› Issue (4) : 76-82. DOI: 10.3969/j.issn.1001-909X.2014.04.010

Distribution and ecological risk assessment of polychlorinated biphenyl in surface sediments in the dumping site of Yongjiang Estuary, China

  • XU Guo-feng, JIN Yu-di, SHEN Ji-ping
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Abstract

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, 8 sites of samples were collected in the dumping site and its nearby area in January, 2014. The contents of polychlorinated biphenyl were detected by a gas 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 6.538 μg·kg-1, while the average content was 3.413 μg·kg-1 in 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, PCB 118, PCB 155, and the contents of PCB118 and PCB155 were 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.

Key words

dumping site / sediment / polychlorinated biphenyl / distributing characteristic / risk assessment

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XU Guo-feng, JIN Yu-di, SHEN Ji-ping. Distribution and ecological risk assessment of polychlorinated biphenyl in surface sediments in the dumping site of Yongjiang Estuary, China[J]. Journal of Marine Sciences. 2014, 32(4): 76-82 https://doi.org/10.3969/j.issn.1001-909X.2014.04.010

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