Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Scientific Observing and Experimental Station of Fishery Resources and Environment in the Middle and Lower Reaches of Pearl River, Ministry of Agriculture and Rural Affairs, China; Guangdong Provincial Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China.
Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China.
Mar Pollut Bull. 2021 Sep;170:112666. doi: 10.1016/j.marpolbul.2021.112666. Epub 2021 Jun 26.
The pollution characteristics, sources, and ecological risk of polycyclic aromatic hydrocarbons (PAHs) in surface sediment samples from the river networks and outlets of the Pearl River Delta (PRD) were investigated. The total PAH concentrations were in the range of 69.1-1297 ng g in river networks and 56.6-617 ng g in river outlets. The results of source identification showed that PAHs in sediments were mainly derived from combined sources of coke tar and liquid fossil fuel combustion, coal/wood combustion, and petroleum contamination. The ecological risks of PAHs were evaluated based on sediment quality guidelines (SQG), mean probable effects levels quotient values (PEL-Q), and the toxicity equivalence factor (TEQ) method. The ecological risks of PAHs in sediments were at moderate levels in the Pearl River Delta. Although no high risk was found, regular and continuous monitoring of PAHs in sediments needs to be performed.
本研究调查了珠江三角洲河网和出海口表层沉积物中多环芳烃（PAHs）的污染特征、来源及生态风险。河网和出海口沉积物中总多环芳烃浓度分别在 69.1-1297ng/g 和 56.6-617ng/g 之间。来源解析结果表明，沉积物中多环芳烃主要来自焦煤和液态化石燃料燃烧、煤炭/木材燃烧和石油污染的综合源。基于沉积物质量基准（SQG）、平均可能效应水平商值（PEL-Q）和毒性等效因子（TEF）方法对多环芳烃的生态风险进行了评估。珠江三角洲沉积物中多环芳烃的生态风险处于中等水平。尽管未发现高风险，但仍需对沉积物中多环芳烃进行定期和连续监测。
