Spatial distribution and ecological risk of polychlorinated biphenyls in sediments from Qinzhou Bay, Beibu Gulf of South China

Mar Pollut Bull. 2014 Mar 15;80(1-2):338-43. doi: 10.1016/j.marpolbul.2013.12.028. Epub 2013 Dec 28.

Abstract

The residual level of polychlorinated biphenyls (PCBs) was determined in the surface sediments collected from the Qinzhou Bay, Beibu Gulf of Southern China. The results showed that the total concentration of PCBs ranged from 1.62 to 62.63 ng/g dry wt, with a mean of 9.87 ng/g dry wt. Generally, the average PCBs concentrations in three sample groups descended in this order: inner bay > outer bay > rivers. On a mean level, with respect to the PCBs homologue profiles, the analysis suggested that tetrachlorinated biphenyls was the most abundant PCB, followed by hexachlorinated biphenyls, pentachlorinated biphenyls. PCB profiles varied according to the nature of the site and its proximity to the sources. PCA with multiple linear regression analysis indicated that Aroclor products contributed to the PCBs in Qinzhou Bay. Risk assessments conducted on the levels indicated that PCBs in sediments of Qinzhou Bay posed no significant risk to human health.

Keywords: Beibu Gulf of South China; Polychlorinated biphenyls; Qinzhou Bay; Surface sediment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bays / chemistry
  • China
  • Environmental Monitoring*
  • Geologic Sediments / chemistry*
  • Polychlorinated Biphenyls / analysis*
  • Risk Assessment
  • Water Pollutants, Chemical / analysis*
  • Water Pollution, Chemical / statistics & numerical data

Substances

  • Water Pollutants, Chemical
  • Polychlorinated Biphenyls