Zhan Yong, Wei Ting-Ting, Ye Hui-Bin, Dong Bin, Zhang Ling-Jun, Huang Yuan-Dong
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Huan Jing Ke Xue. 2021 Apr 8;42(4):1830-1838. doi: 10.13227/j.hjkx.202008267.
Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs), two typical persistent organic pollutants, are the research focus due to their mutagenesis, carcinogenesis, teratogenesis, and bioaccumulation. The content distribution and residual characteristics of PAHs and PCBs were investigated in the sediments from the Sanya River. Source apportionment was further explored based on the analysis of the spatial distribution, and the ecological risk evaluation was carried out with the sediment quality criteria and standards. The results indicate that the content of ΣPAHs and ΣPCBs in the sediment range from 265.00 μg·kg to 6735.00 μg·kg and 1.75 μg·kg to 92.75 μg·kg, with relatively high contents in the east and west river upstream, respectively, which had a strong correlation with the industrial structure and river movement of the study area. The composition and source apportionment demonstrate that PAHs originated mostly from the combustion of petroleum with low PAHs, and haxa-CB and hepta-CB are the predominant PCBs congeners, primarily resulting from the migration of PCBs in the capacitor. The ecological risk evaluation demonstrates that the biotoxic effect of the PAHs is not obvious, with a low ecological risk. However, several PAHs monomers exceeded the standard significantly in some sampling sites, which should be of concern due to its serious threat of exposure to organisms. The probability of a biotoxic effect of PCBs is 10%-50%, which occasionally produces a negative ecological effect.
多环芳烃（PAHs）和多氯联苯（PCBs）是两种典型的持久性有机污染物，因其具有致突变性、致癌性、致畸性和生物累积性而成为研究热点。对三亚河沉积物中PAHs和PCBs的含量分布及残留特征进行了研究。基于空间分布分析进一步探讨了源解析，并依据沉积物质量标准进行了生态风险评估。结果表明，沉积物中ΣPAHs和ΣPCBs含量范围分别为265.00 μg·kg至6735.00 μg·kg以及1.75 μg·kg至92.75 μg·kg，分别在西河上游和东河上游含量相对较高，这与研究区域的产业结构和河流流向有较强相关性。组成及源解析表明，PAHs主要源于低环PAHs的石油燃烧，六氯联苯和七氯联苯是主要的PCBs同系物，主要源于电容器中PCBs的迁移。生态风险评估表明，PAHs的生物毒性效应不明显，生态风险较低。然而，部分采样点几种PAHs单体超标显著，因其对生物暴露构成严重威胁，应予以关注。PCBs产生生物毒性效应的概率为10%-50%，偶尔会产生负面生态效应。
