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| Pollution and ecological risk assessment of polycyclic aromatic hydrocarbons in the water environment of Shaying River Basin, China |
| Received:November 04, 2019 |
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| KeyWord:Shaying River Basin;polycyclic aromatic hydrocarbons;source;ecological risk |
| Author Name | Affiliation | E-mail | | DU Shi-lin | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Environmental Analysis Technology Testing Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | DING Ting-ting | Environmental Analysis Technology Testing Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | DONG Huai-jin | Environmental Analysis Technology Testing Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | LIU Xiao-xue | Environmental Analysis Technology Testing Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | | ZHANG Ya-hui | Environmental Analysis Technology Testing Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | zhangyahui@craes.org.cn | | ZENG Hong-hu | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China | | | HE Lian-sheng | Environmental Analysis Technology Testing Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | |
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| Abstract: |
| To investigate the spatial distribution, source, and ecological risk of polycyclic aromatic hydrocarbons(PAHs)in the water environment of Shaying River Basin, 16 PAHs in the overlying water and sediment samples obtained from 30 sites were analyzed in July 2018; the samples were analyzed using Gas Chromatography/Mass Spectrometry(GC/MS)techniques. The concentrations of total PAHs detected in the samples was found to be in the range of 356.60~2 275.04 ng·L-1 in the overlying water and 64.27~11 433.63 ng·g-1 in the sediments, with average concentrations of 1 051.23 ng·L-1 and 965.77 ng·g-1, respectively. The PAHs concentration in the overlying water of each tributary was in the sequence of Jialu River > Yinghe > Shahe > Lihe, whereas a roughly opposite trend was observed for the surface sediments. The PAHs with 4~6 rings were the dominant PAHs monomers in the overlying water and sediments. Compared with other rivers in China and foreign countries, a higher pollution level was observed in the overlying water, and a lower pollution level was observed in the surface sediments. A source analysis indicated that the PAHs in overlying water and sediment mainly originated due to high temperature combustion. Furthermore, an ecological risk assessment revealed that the PAHs in the surface water were at high risk levels, especially for PAHs monomers with high molecular weight(4~6 rings), such as Fla, Pyr, BaA, BbF, BaP, IcdP, and BghiP. The concentration of each PAHs monomer in the surface sediment did not exceed the Effect range median(ERM)and the Frequent effect level(FEL), except in site S27. This reveales the low probability of potential ecological risk due to PAHs in the surface sediments of the Shaying River Basin. |
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