中文关键词成都市夏季挥发性有机物(VOCs)浓度特征臭氧生成潜势(OFP)PMF受体模型 英文关键词Chengdusummervolatile organic compounds (VOCs)concentration characteristicsozone formation potential(OFP)PMF receptor model

作者	单位	E-mail
徐晨曦	四川省生态环境科学研究院, 成都 610000	172626527@qq.com
陈军辉	四川省生态环境科学研究院, 成都 610000	9503062@qq.com
姜涛	四川省生态环境科学研究院, 成都 610000
韩丽	四川省生态环境科学研究院, 成都 610000
王波	四川省生态环境科学研究院, 成都 610000
李英杰	四川省生态环境科学研究院, 成都 610000
王成辉	四川省生态环境科学研究院, 成都 610000
刘政	四川省生态环境科学研究院, 成都 610000
钱骏	四川省生态环境科学研究院, 成都 610000

中文摘要 2019年6~9月在成都市区对挥发性有机物（VOCs）进行在线观测，研究夏季VOCs浓度水平、变化特征、臭氧生成贡献（OFP）及来源贡献.结果表明，成都市区夏季TVOCs（总挥发性有机物）平均质量浓度为112.66 μg·m^-3，烷烃（29.51%）和卤代烃（23.23%）为主要组分；VOCs日变化峰值主要出现在上午10：00~11：00，受城市机动车、油气挥发和工业排放影响；夏季VOCs的OFP贡献中芳香烃贡献率（42.7%）最高，其次为烯烃（27.4%），关键活性物种为间/对-二甲苯、乙烯、丙烯、邻-二甲苯、异戊烷、环戊烷和丙烯醛等；使用PMF受体模型进行来源解析表明，移动源为成都市区夏季VOCs的主要贡献源，贡献率为34%，其次为工业源（17%）和油气挥发（14%），溶剂使用源和天然源分别贡献11%和13%.因此，机动车和工业排放为成都市区VOCs的重点控制源，同时溶剂使用及油气挥发等污染源的管控也不可忽视. 英文摘要 In the research, volatile organic compounds (VOCs) were observed online in urban areas of Chengdu to study VOC concentration level, change characteristics, ozone generation contribution (OFP), and source contribution from June to September 2019. The results showed that the average concentration of TVOCs (total volatile organic compounds) was 112.66 μg·m^-3, with alkanes (29.51%) and halogenated hydrocarbons (23.23%) forming the main components. The diurnal peak in VOCs mainly occurred from 10:00 am to 11:00 am, which is affected by urban motor vehicles, oil or gas volatilization, and industrial emissions. For OFP contribution of VOCs in summer, the contribution rate of aromatic hydrocarbons (42.7%) was the highest, followed by alkenes (27.4%). The key active species were m/p-xylene, ethylene, propylene, o-xylene, isopentane, cyclopentane, and acrolein. According to the source analysis by the PMF model, mobile sources are the main contributors of VOCs in summer in Chengdu, contributing 34% to TVOCs, followed by industrial sources (17%), volatile oil and gas (14%), and solvent use and natural sources contributing 11% and 13%. Therefore, motor vehicle and industrial emissions are the key control sources of VOCs in Chengdu, although control of pollution sources such as solvent use and oil or gas volatilization cannot be ignored.

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