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Sci Total Environ

Title:		Comparative study of volatile organic compounds in ambient air using observed mixing ratios and initial mixing ratios taking chemical loss into account - A case study in a typical urban area in Beijing
Author(s):		Gao J; Zhang J; Li H; Li L; Xu L; Zhang Y; Wang Z; Wang X; Zhang W; Chen Y; Cheng X; Zhang H; Peng L; Chai F; Wei Y;
Address:		"College of Engineering, Shantou University, Shantou 515063, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: 15jgao@stu.edu.cn. College of Engineering, Shantou University, Shantou 515063, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Collaborative Innovation Center on Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing 210044, China. Electronic address: lihong@craes.org.cn. Institute of Environmental Planning and Design Co. Ltd., Nanjing University, Nanjing 210093, China. Daishan Environmental Protection Bureau, Daishan 316200, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Beijing Municipal Environmental Monitoring Center, Beijing 100048, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100011, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Environmental Research Institute, Shandong University, Jinan 250100, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China"
Journal Title:		Sci Total Environ
Year:		2018
Volume:		20180220
Issue:
Page Number:		791 - 804
DOI:		10.1016/j.scitotenv.2018.01.175
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Volatile organic compounds (VOCs) can react with atmospheric radicals while being transported after being emitted, resulting in substantial losses. Using only observed VOC mixing ratios to assess VOC pollution, is therefore problematic. The observed mixing ratios and initial mixing ratios taking chemical loss into consideration were performed using data for 90 VOCs in the atmosphere in a typical urban area in Beijing in winter 2013 to gain a more accurate view of VOC pollution. The VOC sources, ambient VOC mixing ratios and compositions, variability and influencing factors, contributions to near-ground-ozone and health risks posed were assessed. Source apportionment should be conducted using initial mixing ratios, but health risks should be assessed using observed mixing ratios. The daytime daily mean initial mixing ratio (72.62ppbv) was 7.72ppbv higher than the daytime daily mean observed mixing ratio (64.90ppbv). Alkenes contributed >70% of the consumed VOCs. The nighttime daily mean observed mixing ratio was 71.66ppbv, 6.76ppbv higher than the daytime mixing ratio. The observed mixing ratio for 66 VOCs was 40.31% higher in Beijing than New York. The OFPs of Ini-D (266.54ppbv) was underestimated 23.41% compared to the OFP of Obs-D (204.14ppbv), improving emission control of ethylene and propene would be an effective way of controlling O(3). Health risk assessments performed for 28 hazardous VOCs show that benzene, chloroform, 1,2-dichloroethane, and acetaldehyde pose carcinogenic risk and acrolein poses non-carcinogenic risks. Source apportionment results indicated that vehicle exhausts, solvent usage and industrial processes were the main VOC source during the study"
Keywords:		Beijing air pollution Chemical loss Health risk Pollution characteristics Source apportionment VOCs;
Notes:		"PubMed-not-MEDLINEGao, Jian Zhang, Jie Li, Hong Li, Lei Xu, Linghong Zhang, Yujie Wang, Zhanshan Wang, Xuezhong Zhang, Weiqi Chen, Yizhen Cheng, Xi Zhang, Hao Peng, Liang Chai, Fahe Wei, Yongjie eng Netherlands 2018/02/20 Sci Total Environ. 2018 Jul 1; 628-629:791-804. doi: 10.1016/j.scitotenv.2018.01.175. Epub 2018 Feb 20"