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| Monte Carlo simulations of ecological risk assessment of polycyclic aromatic hydrocarbons in sediments from the Guangzhou reach of the Pearl River |
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Abstract Based on concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) measured in the surface sediment samples collected from 24 locations along the Guangzhou reach of the Pearl River, Monte Carlo simulation method modified with the Logistic chaotic iterative sequence was used to analyze the ecological risk probabilities of PAHs in the sediments. Results showed that the risks of seven PAH species were in the order of phenanthrene > pyrene > fluoranthene > chrysene > benzo(a)anthracene > benzo(a)pyrene > dibenzo(a,h)anthracene. It should be paid more attention that phenanthrene, pyrene, and fluoranthene could pose higher ecological risks for aquatic organisms. In addition, except phenanthrene, the contributions to the total ecological risk of the exposure concentrations of the other six PAHs were all over 90%, indicating that the ecological risk of the PAHs in this region was determined by the exposure concentrations.
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Received: 28 July 2011
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ZHANG Li, ZHANG Yuan, QI Shi-Hua, LI Hui, XING Xin-Li, ZHANG Ze-Zhou, ZHENG Huang, SUN Yan, MIN Yang. Characteristics of atmospheric PM2.5 and the variation of PAHs in PM2.5 during spring in Hongshan district, Wuhan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2319-2325. |
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