College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, PR China; Key Laboratory of Estuarine & Coastal Engineering of Ministry of Transport, Shanghai 201201, PR China; International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Shanghai Maritime University, Shanghai 201306, PR China.
College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, PR China; International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Shanghai Maritime University, Shanghai 201306, PR China.
Mar Pollut Bull. 2020 Oct;159:111494. doi: 10.1016/j.marpolbul.2020.111494. Epub 2020 Jul 30.
The source, distribution, and potential toxicity of sedimentary polycyclic aromatic hydrocarbons (PAHs) along the mouth bar of the Yangtze River Estuary were investigated. Total concentrations of 17 PAHs in the study area ranged from 34.94 to 580.26 ng/g (mean value 146.31 ng/g). Results of PMF model revealed that mixed vehicle emissions (38.43%), natural gas combustion (24.98%), biomass combustion (20.76%) and coal combustion (15.83%) were sources of these sedimentary PAHs. The ERL/ERM, TEL/PEL and TEC/PEC values showed that the potential toxicity of PAHs was at low to medium level, but the presence of benzo[a]pyrene (BaP) and benzo[e]pyrene (BeP) requires more attention and research. Sedimentary PAHs pollution level in the three shoals (East Nanhui Shoal, Jiuduansha Shoal and Hengsha Shoal) was higher than that of the two passages (South Passage and North Passage), which demonstrates the possibility of restoration of the adjacent shoals by dredged soils in terms of PAHs pollution.
本研究调查了长江口口门沙洲沉积物中多环芳烃（PAHs）的来源、分布和潜在毒性。研究区域内 17 种 PAHs 的总浓度范围为 34.94-580.26ng/g（平均值为 146.31ng/g）。PMF 模型的结果表明，混合车辆排放（38.43%）、天然气燃烧（24.98%）、生物质燃烧（20.76%）和煤炭燃烧（15.83%）是这些沉积物中 PAHs 的来源。ERL/ERM、TEL/PEL 和 TEC/PEC 值表明，PAHs 的潜在毒性处于低到中等水平，但苯并[a]芘（BaP）和苯并[e]芘（BeP）的存在需要更多的关注和研究。三个沙洲（东汇嘴沙洲、九段沙和横沙）的沉积物 PAHs 污染水平高于两个通道（南槽和北槽），这表明通过疏浚土壤可以恢复相邻沙洲的 PAHs 污染。
