数字农科院2.0

Spatiotemporal distribution, sources apportionment and ecological risks of PAHs: a study in the Wuhan section of the Yangtze River

文献类型： 外文期刊

作者： Chen, Yulin;Song, Ranran;Li, Ping;Wang, Yile;Tan, Yang;Ma, Yongfei;Yang, Lie;Wu, Li;Du, Zhenjie;Qi, Xuebin;Zhang, Zulin

作者机构：

关键词： PAHs;Fugacity fraction;Source apportionment;Fluxes;Spatiotemporal distribution

期刊名称： ENVIRONMENTAL GEOCHEMISTRY AND HEALTH

ISSN： 0269-4042

年卷期： 2023 年

页码：

收录情况： SCIE（2023版）

摘要： This study investigated the sources, contamination and ecological risks of polycyclic aromatic hydrocarbons (PAHs) based on their spatiotemporal distribution in aquatic environment in the Wuhan section of the Yangtze River (WYR). The fugacity ratio evaluation indicated that sediment was secondary release sources of two- and three-ring PAHs and sinks of four- and five-ring PAHs. The total concentrations of PAHs (sigma(16)PAHs) ranged from 2.51 to 102.5 ng/L in water with the dominant contribution of 47.8% by two-ring PAHs. sigma(16)PAHs in sediments varied from 5.90 to 2926 ng/g with the contribution of 35.4% by four-ring PAHs. The higher levels of PAHs occurred around developed industrial areas during the wet season, which was related to local industrial emissions and influenced by rainfall/runoff. Annual flux of sigma(16)PAHs was estimated of 28.77 t. The PMF model analysis revealed that petroleum and industrial emissions were the dominant sources in water accounting for 58.5% of the total pollution, although traffic emission was the main source for sediment accounting for 44.6%. Risk assessments showed that PAHs in water were at low risks, whereas about 44% of the sediments were identified as medium risks. Therefore, energy structure adjustment and further implement of regulation and monitoring are necessary to reduce PAH emissions.

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