京津潮白河多环芳烃及其衍生物分布  

Distribution of Polycyclic Aromatic Hydrocarbons and Their Derivatives in Chaobai River of Beijing-Tianjin Area

作　　者：付璐婧 乔梦[2] 赵旭[2] 李一兵 李卓蓉 刘冬晴 Fu Lujing;Qiao Meng;Zhao Xu;Li Yibing;Li Zhuorong;Liu Dongqing(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy ofSciences,Beijing 100085,China;Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control,National Demonstration)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中国科学院生态环境研究中心,环境水质学国家重点实验室,北京100085 [3]北京市可持续城市排水系统构建与风险控制工程技术研究中心,水环境国家级实验教学示范中心,北京100044

出　　处：《生态毒理学报》2019年第3期233-239,共7页Asian Journal of Ecotoxicology

基　　金：中国科学院重点研究项目(ZDRW-ZS-2016-5-6);国家自然科学基金项目(51508552,51420105012)

摘　　要：采用固相萃取-气相色谱质谱联用仪测定京津潮白河中的多环芳烃(PAHs)及其衍生物(SPAHs)的污染水平,并采用絮凝法分析水样中自由态PAHs/SPAHs和结合态PAHs/SPAHs的分布。结果表明,京津潮白河中PAHs和SPAHs总质量浓度分别为55.06~215.02ng·L^-1和92.37~227.33ng·L^-1,上游河段PAHs和SPAHs质量浓度均低于下游河段。7种致癌PAHs占比为22%~41%,需引起重视。本研究中的SPAHs包括三类物质:氧化PAHs(OPAHs)、甲基PAHs(MPAHs)和氯代PAHs(ClPAHs)。其中,OPAHs对SPAHs贡献最大(59%~71%),其次是ClPAHs(22%~32%)和MPAHs(7%~14%)。京津潮白河中PAHs和SPAHs主要以自由态形式存在,总浓度可以准确估计污染物的环境风险。The pollution levels of polycyclic aromatic hydrocarbons (PAHs) and their derivatives (SPAHs) in Chaobai River of Beijing-Tianjin Area were determined by the combined method of solid-extraction and gas chromatography- mass spectrometer.Meantime,the distribution characteristics of freely dissolved PAHs/SPAHs and combined PAHs/SPAHs in water samples were analyzed by flocculation.The results showed that the total mass concentrations of PAHs and SPAHs in Chaobai River of Beijing-Tianjin Area were 55.06 -215.02 ng·L^-1 and 92.37- 227.33 ng·L^-1,respectively.The mass concentrations of PAHs and SPAHs in the upper reaches of the river were lower than that of the downstream sections.It is worth noting that the proportion of seven kinds of carcinogenic PAHs in the whole PAHs is 22%-41%.There are three types of SPAHs in this study,including methyl polycyclic aromatic hydrocarbons (MPAHs),oxygenated polycyclic aromatic hydrocarbons (OPAHs) and chlorinated polycyclic aromatic hydrocarbons (ClPAHs).Among them,OPAHs show the main contribution to the SPAHs with the proportion of 59%-71%,followed by ClPAHs (22%-32%) and MPAHs (7%-14%).In the Chaobai River of Beijing-Tianjin Area,PAHs and SPAHs mainly exist in the form of freely dissolved state,and the environmental risk of pollutants can be accurately estimated by the total concentration.

关 键 词：京津潮白河 多环芳烃(PAHs) 多环芳烃衍生物(SPAHs) 污染水平 自由态 

分 类 号：X171.5[环境科学与工程—环境科学]