Marine Bioresources and Environment Research Center, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China.
Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.
Environ Sci Pollut Res Int. 2021 May;28(20):25858-25865. doi: 10.1007/s11356-020-11956-w. Epub 2021 Jan 21.
In this study, the concentrations of 16 kinds of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of Daya Bay were determined and analyzed. Results showed that 16 PAHs were detected in all the samples, and the total PAH concentration ranged from 70.18 to 128.04 ng g, with an average of 103.17 ng g. The cyclic number distribution of PAHs in the sediments was mainly 4 and 5 rings. Six classic PAH ratios named Ant/(Ant + Phe), Fla/(Fla + Pyr), [InP/(InP + BghiP)], [BaA/(BaA + Chr)], BaA/BghiP, and LMW/HMW, and principal component analyses showed that the main source of PAHs in this region was combustion (biomass, coal, and petroleum combustion), and the secondary source was petroleum. The ecological risk analysis of PAHs by using effect range low/median method and mean effects range-median quotient method showed that all of PAHs are lower than the effect range low (ERL) level and the effects range-median quotient (M-ERM-Q) value of all stations is 0.0027-0.0067, with an average value of 0.0046. Thus, it can be seen that PAHs are at a low-risk level in surface sediments of Daya Bay.
本研究测定并分析了大亚湾表层沉积物中 16 种多环芳烃（PAHs）的浓度。结果表明，所有样品中均检测到 16 种 PAHs，总 PAH 浓度范围为 70.18128.04ng/g，平均值为 103.17ng/g。沉积物中 PAHs 的环数分布主要为 4 环和 5 环。选取了 6 种经典比值（Ant/(Ant + Phe)、Fla/(Fla + Pyr)、[InP/(InP + BghiP)]、[BaA/(BaA + Chr)]、BaA/BghiP 和 LMW/HMW），并结合主成分分析（PCA），结果表明该地区 PAHs 的主要来源是燃烧（生物质、煤和石油燃烧），次要来源是石油。采用效应区间低值/中值法（ERL/ERM）和均值效应区间中值商（M-ERM-Q）对 PAHs 进行生态风险分析，结果表明所有 PAHs 均低于效应区间低值（ERL）水平，所有站位的效应区间中值商（M-ERM-Q）值为 0.00270.0067，平均值为 0.0046。由此可见，大亚湾表层沉积物中 PAHs 处于低风险水平。
