PDF《成都市 2017 年夏季大气 VOCs 污染特征 、 臭氧》

第32 卷第4期2019 年4月环境科学研究Research of Environmental Sciences Vol.

32?No.4 Apr.?2019 收稿日期: 2018~03~06 修订日期: 2019~01~04 作者简介: 徐晨曦(1990~)?女?四川成都人?工程师?硕士?主要从事挥发性有机物污染防治研究?172626527@ qq.com. ?责任作者?陈军辉(1972~)?女?四川成都人?研究员?硕士?主要从事大气环境科学研究?9503062@ qq.com 基金项目: 国家重点研发计划项目(No.2018YFC0214001) Supported by National Key Research and Development Program of China (No.2018YFC0214001) 成都市

2017 年夏季大气 VOCs 污染特征、臭氧 生成潜势及来源分析 徐晨曦? 陈军辉? ? 韩丽? 王波? 王继钦 四川省环境保护科学研究院? 四川 成都

610041 摘要: 为评估成都市

2017 年夏季(6―8 月)开展的臭氧防治行动措施对空气质量的改善效果?采用在线监测系统对成都市环境 空气中 VOCs 物种进行监测?对比分析 VOCs 污染特征、OFP (臭氧生成潜势)?并利用 PMF(正矩阵因子法)模型对 VOCs 主要来 源进行解析. 结果表明:2017 年8月φ(VOCs)平均值为 31? 85*10-9 ?比2016 年同期下降了 32%?其中?φ(芳香烃)和φ(卤代烃) 平均值下降最为明显. φ(VOCs)日变化呈双峰型?分别在每日 09:00 和23:00 左右达峰值?臭氧防治行动期间 φ(VOCs)月均小 时值低于

2016 年同期. VOCs 的OFP 敏感性物种以烯烃为主?占总 VOCs OFP 贡献的 48%.

2017 年8月成都市 OFP 为61? 89* 10-9 ?比2016 年同期下降 44%. VOCs 源解析结果发现?2017 年8月油气挥发源、有机溶剂使用源、工业源、生物质燃烧源等排放 占比均有所下降?而机动车排放源和天然源的排放占比增加. 研究显示?成都市

2017 年夏季臭氧防治行动对成都市大气 VOCs 排放有明显的控制效果. 关键词: VOCs? 污染特征? 臭氧生成潜势? PMF 中图分类号: X831 文章编号: 1001~6929(2019)04~0619~08 文献标志码: A DOI: 10? 13198Mj? issn? 1001~6929? 2019? 01?

25 Analyses of Pollution Characteristics? Ozone Formation Potential and Sources of VOCs Atmosphere in Chengdu City in Summer

2017 XU Chenxi? CHEN Junhui? ? HAN Li? WANG Bo? WANG Jiqin Sichuan Academy of Environmental Sciences? Chendu 610041? China Abstract: In order to evaluate the air quality improvement during the Ozone Control Action in Chengdu City in summer 2017? on~line monitoring systems were used to monitor atmosphere volatile organic compounds (VOCs) in the ambient air of Chengdu City. The pollution characteristics of VOCs and ozone formation potential were compared and analyzed. In addition? the Positive Matrix Factorization (PMF) model was utilized to analyze the main sources of VOCs. The results indicated that the VOCs volume fraction was 31? 85*10-9 in August 2017? which decreased by 32% compared to the same period in 2016? especially the concentration of aromatic hydrocarbon and halogenated hydrocarbon declined dramatically. The daily change of VOCs shows a bimodal pattern? peaking at 09:00 and 23:00? respectively. Furthermore? the average hourly volume fraction of VOCs is lower than that of the same period of last year during the Ozone Control Action. The majority of VOCs′ OFP sensitive species is alkenes? accounting for 48% of the total OFP of VOCs. The OFP of VOCs is 61? 89*10-9 in August 2017? falling down 44% compared to the same period in 2016. VOCs source analyses by PMF model showed that the emissions of fuel volatile? solvent evaporation? industrial sources and biomass burning declined? while the ratio of emissions of vehicle and natural resources increased in the summer of 2017. Overall? the ozone control action of Chengdu City in the summer of