天津中心城区环境空气挥发性有机物污染特征分析  

Pollution Characterization of Volatile Organic Compounds in Ambient Air of Tianjin Downtown

作　　者：翟增秀[1,2] 邹克华[1] 李伟芳[1] 王亘[1] 翟友存[1,2] 

机构地区：[1]天津市环境保护科学研究院国家环境保护恶臭污染控制重点实验室,天津300191 [2]天津迪兰奥特环保科技开发有限公司,天津300191

出　　处：《环境科学》2013年第12期4513-4518,共6页Environmental Science

基　　金：环境保护公益性行业科研专项(201009034);国家自然基金科学项目(21207098);天津市自然科学基金项目(11JCYBJC05300)

摘　　要：为研究天津中心城区挥发性有机物的污染特征，在天津中心城区布点26个，分别对春、夏、秋、冬四季进行了系统采样．天津中心城区共检出挥发性有机物80余种，检出率大于80％的物质主要为烷烃、苯系物和卤代烃．天津中心城区挥发性有机物总浓度（体积分数，下同）季节变化特征为：春季（110．43×10^-9）〉秋季（93．73×10^-9）〉冬季（73．37×10^-9）〉夏季（60．43×10^-9）．统计结果表明，城区挥发性有机物总浓度主要集中在30×10^-9-90×10^-9之间，在此区间4个季节的样品百分比均在50％以上．天津中心城区不同季节VOCs组成存在一定差异．含氧有机物和烷烃是VOCs主要组成物质，两者浓度百分比之和4个季节均在50％以上．对苯系物和卤代烃这两类主要污染物，进行了季节变化分析．To study the pollution characteristics of volatile organic compounds（VOCs） in Tianjin downtown ambient air, 26 sampling points were distributed in Tianjin and systematic sampling was carried out in Spring, Summer, Autumn and Winter, respectively. More than 80 kinds of VOCs were detected which mainly included alkanes, BETX and halohydrocarbon with detection rates of over 80%. The total concentration of VOCs changed with the seasons, in the order of Spring （ 110.43 x×10^-9） 〉 Autumn （93.73 ×10^-9 ） 〉 Winter （73.37×10^-9 ） 〉 Summer （60.43 ×10^-9 ）. The result of concentration statistics indicates that the total concentration of OCs in urban areas was in the range of 30 ×10^-9-90 ×10^-9 and the number of samples in every season in this concentration range accounted for over 50%. There were also differences in the composition of VOCs with the change of seasons in Tianjin. Oxygenated organic compounds and hydrocarbons were the main substances of VOCs and the concentration percentage of them was over 50% in every season. Two main pollutants, BETX and halohydrocarbon, were analyzed for seasonal variation in this paper.

关 键 词：天津中心城区 环境空气 挥发性有机物 苯系物 卤代烃 

分 类 号：X511[环境科学与工程—环境工程]