文献类型：期刊文献

中文题名：上海市机动车尾气VOCs组成及其化学反应活性

英文题名：The composition and chemical reactivity of volatile organic compounds (VOCs) from vehicle exhaust in Shanghai,China

作者：鲁君[1,2];王红丽[1];陈长虹[1];黄成[1];李莉[1];程真[1];刘娟[3]

机构：[1]上海市环境科学研究院,上海200233;[2]华东理工大学资源与环境工程学院,上海200237;[3]上海市环境监测中心,上海200030

年份：2010

卷号：32

期号：6

起止页码：19

中文期刊名：环境污染与防治

外文期刊名：Environmental Pollution & Control

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：国家"863计划"项目(No.2007AA06Z409)

语种：中文

中文关键词：挥发性有机物;·OH消耗速率;机动车尾气

外文关键词：VOCs; ·OH-reactivity; vehicle exhaust

摘要：采用钢罐采样-气相色谱/质谱法,采集并分析了上海市主要交通干道和隧道废气样品中挥发性有机物(VOCs)的污染水平。分析结果表明,交通干道和隧道废气样品的总挥发性有机污染物(TVOC)质量浓度分别为(227.1±40.9)、(2209.9±1228.0)μg/m3;隧道废气样品中的TVOC浓度是交通干道平均浓度的4.3～15.2倍;交通干道废气样品中VOCs主要组分与隧道废气样品中VOCs主要组分非常类似,说明交通干道废气样品中VOCs主要来源于机动车尾气排放。交通干道废气样品中TVOC的.OH消耗速率为(17.21±4.49)s-1,延安东路隧道和打浦路隧道废气样品中TVOC的.OH消耗速率分别为(300.37±120.78)、(138.09±25.30)s-1,烯烃对TVOC的.OH消耗速率贡献最大,其对废气化学反应活性贡献率在70%以上。交通干道和隧道废气样品中关键活性组分是C2～C5的烯烃组分,这些组分也是机动车尾气中的特征污染物,因此可以判断机动车尾气是上海市大气化学反应活性的最大贡献者。
The volatile organic compounds（VOCs）pollution situation on the arterial roads and tunnels in Shanghai was evaluated based on the canister sampling and GC/MS method.Results showed that the mass concentration of total volatile organic compounds（TVOC）on arterial roads and tunnels were（227.1±40.9）and（2 209.9±1 228.0）μg/m3 respectively;The TVOC concentration in tunnels was 4.3-15.2 times of that on arterial roads.Concentrations of ethene,toluene,and ethane were higher than other compounds both on the arterial roads and in tunnels.The ·OH-reactivity of total volatile organic compounds on the arterial roads,in the east Yan＇an road tunnel and Dapu road tunnel were（17.21±4.49）,（300.37±120.78）,（138.09±25.30）s-1 respectively.Alkene contributed more than 70% of the VOCs reactivity.Ethene,propylene,1-tubylene were the top three compounds which had highest ·OH-reactivity.The correlation coefficient of VOCs percentage composition between arterial roads and tunnels were 0.73 and 0.65,which showed that arterial roads were more easily impacted by vehicle exhaust emissions.