珠三角城市群PM2.5和O3污染特征及VOCs组分敏感性分析  

POLLUTION CHARACTERISTICS OF PM2.5 AND O3 IN THE PEARL RIVER DELTA AND THE SENSITIVITY ANALYSIS OF VOCs COMPONENTS

作　　者：周胜[1] 黄报远 陈慧英 林少雄 ZHOU Sheng;HUANG Bao-yuan;CHEN Hui-ying;LIN Shao-xiong(Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;South China Institute of Environmental Science,MEP,Guangzhou 510655,China;Guilin University of Technology,Guilin 541006,China;Zhaoqing Environmental Technology Centre,Zhaoqing 526060,China)

机构地区：[1]仲恺农业工程学院,广州510225 [2]生态环境部华南环境科学研究所,广州510655 [3]桂林理工大学,广西桂林541006 [4]肇庆市环境技术中心,广东肇庆526060

出　　处：《环境工程》2020年第1期42-47,92,共7页Environmental Engineering

基　　金：国家自然科学基金(21762015)

摘　　要：系统分析了珠三角城市群PM 2.5、O 3和挥发性有机物(VOCs)的污染特征,并筛选出对二次有机气溶胶(SOA)和O 3影响较大的敏感性组分。结果显示:珠三角城市群PM 2.5和O 3浓度的季节变化具有明显差异,PM 2.5和O 3分别在1月和10月出现浓度最高值。珠三角城市群VOCs主要以烷烃为主,占比为64.2%,其次为芳香烃和烯烃,含量较高的组分为丁烷、异戊烷、异丁烷和环己烷。SOA生成潜势贡献主要以芳香烃为主,占比为78.5%,其中甲苯、间,对-二甲苯和乙苯的SOA生成潜势最大。O 3生成潜势主要以烯烃为主,占比为42.3%,其次为芳香烃(34.2%)和烷烃(23.5%),其中丙烯、异戊二烯和1-丁烯的O 3生成潜势最大。为有效缓解珠三角城市群PM 2.5和O 3污染,建议优先对机动车尾气、溶剂挥发、涂料使用和石化行业的VOCs敏感组分进行控制。The pollution characteristics of PM 2.5,O 3,and volatile organic compound(VOCs)were analyzed in the Pearl River Delta,China.The sensitive components with greater influence on the formation of secondary organic aerosol(SOA)and O 3 were also screened.The results indicated that there was obvious difference in seasonal variation of PM 2.5 and O 3 concentrations in the Pearl River Delta.The concentrations were the highest in January and October for PM 2.5 and O 3,respectively.The VOCs was dominated with alkane,accounting for 64.2%of the total VOCs mass content,followed by aromatics and alkene.The components with the highest content were butane,isopentane,isobutane and cyclohexane.The SOA generation potential was mainly contributed by aromatics,accounting for 78.5%of the total generation potential.The components with the highest SOA generation potential were toluene,m,p-xylene and ethylbenzene.The O 3 generation potential was mainly contributed by alkene,accounting for 42.3%of the total generation potential,followed by aromatics(34.2%)and alkane(23.5%).The components with higher O 3 generation potential were propylene,isopentadiene and 1-butene.It was suggested that priority control should be given to the sensitive components of VOCs emitted from vehicle exhaust,solvent volatilization,paint usage,and petrochemical industry to alleviate the PM 2.5 and O 3 pollution effectively in the Pearl River Delta.

关 键 词：细颗粒物 臭氧 挥发性有机物 二次有机气溶胶 臭氧生成潜势 

分 类 号：X51[环境科学与工程—环境工程]