Wang Xue-Tong, Hu Bao-Ping, Cheng Hang-Xin, Jia Hao-Hao, Zhou Ying
Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
Chemosphere. 2018 Feb;193:108-117. doi: 10.1016/j.chemosphere.2017.10.145. Epub 2017 Oct 28.
The aims of this study were to investigate the levels, possible sources and potential ecological risks of 26 polycyclic aromatic hydrocarbons (PAHs) including highly carcinogenic dibenzopyrene (DBP) isomers and 4 synthetic musks (SMs) in river sediments from Shanghai. 74 sediment samples were collected from the Huangpu River and its main tributaries. The total concentrations ranged from 52.0 to 11400 ng g for ΣPAHs, 25.1-9910 ng g for 16 USEPA priority PAHs (ΣPAHs), 0.769-384 ng g for ΣDBPs, and 0.080-63.3 ng g for ΣSMs, respectively. Seven sources of PAHs in river sediments were identified by positive matrix factorization (PMF) model. Coal combustion, vehicle and creosote were the major emission sources for PAHs. SMs came mainly from domestic and industrial wastewaters. The toxic equivalent quantities of the benzo[a]pyrene (TEQ) ranged from 7.64 to 3920 ng g for ΣPAHs, 2.07-1150 ng g for ΣPAHs, and 5.53-3150 ng g for ΣDBPs. The TEQ of ΣDBPs made up 73.9% of ΣPAHs, which indicated that DBPs were the major carcinogenic contributors to total PAHs in sediments. According to sediment quality guidelines (SQGs) and mean PEL-Q values, the risks posed by PAHs in sediments were at medium level at most sampling sites, and SMs posed a low ecological risk to sediment-dwelling organisms in Shanghai.
本研究旨在调查上海河流沉积物中包括高致癌性二苯并芘（DBP）异构体在内的26种多环芳烃（PAHs）以及4种合成麝香（SMs）的含量、可能来源和潜在生态风险。从黄浦江及其主要支流采集了74个沉积物样本。ΣPAHs的总浓度范围为52.0至11400 ng/g，16种美国环保署优先控制PAHs（ΣPAHs）的浓度范围为25.1至9910 ng/g，ΣDBPs的浓度范围为0.769至384 ng/g，ΣSMs的浓度范围为0.080至63.3 ng/g。通过正矩阵因子分解（PMF）模型确定了河流沉积物中PAHs的7个来源。煤炭燃烧、车辆和杂酚油是PAHs的主要排放源。SMs主要来自生活污水和工业废水。苯并[a]芘的毒性当量（TEQ）在ΣPAHs中范围为7.64至3920 ng/g，在ΣPAHs中为2.07至1150 ng/g，在ΣDBPs中为5.53至3150 ng/g。ΣDBPs的TEQ占ΣPAHs的73.9%，这表明DBPs是沉积物中总PAHs的主要致癌贡献物。根据沉积物质量准则（SQGs）和平均PEL-Q值，大多数采样点沉积物中PAHs造成的风险处于中等水平，而SMs对上海沉积物栖息生物造成的生态风险较低。
