Wang Yu-Jie, Liao Ri-Quan, Liu Wen-Long, Kannan Kurunthachalam, Ohura Takeshi, Wu Ming-Hong, Ma Jing
School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Shanghai, 200433, China.
Environ Sci Pollut Res Int. 2017 Jul;24(19):16241-16252. doi: 10.1007/s11356-017-9193-0. Epub 2017 May 24.
Chlorinated polycyclic aromatic hydrocarbons (ClPAHs) with three to five aromatic rings have been documented to ubiquitously occur in environmental matrices. In this study, residual concentrations and profiles of 20 individual ClPAHs were determined in 35 surface sediment samples from Maowei Sea, a semi-enclosed shallow inland bay located in the northwestern part of South China Sea. The concentrations of ΣClPAHs in sediment ranged from 313 to 9650 pg/g dw with a detection rate of 43-100%. Of the individual ClPAH congeners, 9-ClPhe was the most abundant in Maowei Sea with the concentrations that ranged from 99.9 to 3610 pg/g dw (mean 1120 pg/g dw). High-molecular-weight ClPAH congeners (four to five rings) were predominant in sediments from sampling locations near a petrochemical industrial complex, whereas low-molecular-weight ClPAH congeners (three rings) were predominant in sediments from estuarine and mangrove locations. A positive matrix factorization (PMF) model in combination with dioxin-like toxic equivalency quotient (TEQ) results was used to apportion sources of ClPAHs. Vehicular emission, combustion/chemical industrial processes, and two other unknown sources accounted for 40.1, 25.5, 20.8, and 13.6%, respectively, of ClPAH sources in sediment; their contribution to TEQs in sediments were 24.2, 40.5, 19.3, and 16.0%, respectively. Further investigations are needed to elucidate potential sources and ecological risks of ClPAHs in sediments.
已记录到含有三至五个芳环的氯化多环芳烃（ClPAHs）普遍存在于环境基质中。在本研究中，测定了取自中国南海西北部一个半封闭浅水内湾——茅尾海的35个表层沉积物样品中20种单个ClPAHs的残留浓度和分布特征。沉积物中ΣClPAHs的浓度范围为313至9650 pg/g干重，检出率为43 - 100%。在单个ClPAH同系物中，9 - ClPhe在茅尾海最为丰富，其浓度范围为99.9至3610 pg/g干重（平均1120 pg/g干重）。高分子量ClPAH同系物（四环至五环）在靠近石化工业园区的采样点沉积物中占主导地位，而低分子量ClPAH同系物（三环）在河口和红树林区域的沉积物中占主导地位。结合二噁英类毒性当量商（TEQ）结果，采用正定矩阵因子分解（PMF）模型来分配ClPAHs的来源。车辆排放、燃烧/化学工业过程以及其他两个未知来源分别占沉积物中ClPAHs来源的40.1%、25.5%、20.8%和13.6%；它们对沉积物中TEQs的贡献分别为24.2%、40.5%、19.3%和16.0%。需要进一步研究以阐明沉积物中ClPAHs的潜在来源和生态风险。
