Pollution characteristics and health risk assessment of benzene homologues in ambient air in the northeastern urban area of Beijing, China

查看全文 作　　者：Lei [1,2]Li;Hong [1]Li;Xinmin [1]Zhang;Li [2]Wang;Linghong [3]Xu;Xuezhong [1]Wang;Yanting [1,4]Yu;Yujie [1]Zhang;Guan [1]Cao

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences;[2]Shandong University of Science and Technology;[3]China University of Mining and Technology;[4]Environment Research Institute, Shandong University

出　　处：《Journal of Environmental Sciences》索引2014年第26卷第1期,共10页

基　　金：supported by the Special Research Project for the National Environmental Protection Public Welfare Industry of China(No.201009032);the Strategic Pilot Science and Technology Project of Chinese Academy of Sciences(Class B)(No.XDB05010200);the Project of National Natural Science Foundation of China(No.41175111) 摘　　要：Ambient benzene homologues were measured at a site in the northeastern urban area of Beijing, China, from August 24 to September 4, 2012 by SUMMA canister sampling followed by laboratory determination using cryogenic cold trap pre-concentration-GC-MS/FID, and their health risks were also assessed. Daily total benzene homologues ranged from 0.99 to 49.71 μg/m3with an average of 11.98 μg/m3. Benzene homologues showed higher concentrations in the morning and evening than that at noontime. Comparison with previous studies revealed a trend of decrease for ambient benzene homologues probably due to the efective emission control in Beijing in recent years. Vehicular exhaust was the main source while volatilization of paints and solvents also made substantial contributions. Health risk assessment showed that BTEX(benzene, toluene, ethylbenzene, o-xylene, m-xylene and p-xylene) and styrene had no appreciable adverse non-cancer health risks for the exposed population, while benzene has potential cancer risk of 1.34E-05. Available data from cities in China all implied that benzene imposes relatively higher cancer risk on the exposed populations and therefore strict control measures should be taken to further lower ambient benzene levels in China. 关键词：健康风险评估环境空气中国城市苯系物城市区域北京污染特征东北

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Pollution characteristics and health risk assessment of benzene homologues in ambient air in the northeastern urban area of Beijing, China

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