上海市典型工业区大气中VOCs及其来源分析

摘要

为更好地了解和掌握上海市某典型工业区挥发性有机化合物(VOCs)的污染情况和来源,对该区2009～2015年大气环境的VOCs数据进行了统计分析.数据分析结果表明:该区域总挥发性有机物(TVOC)浓度随季节变化,呈冬季高、春夏季低的规律;大气中共检测出48种VOCs,其中,乙酸乙酯占比为30%、n-庚烷占比为11%、庚烷占比为10%、甲苯占比为7%(质量分数);分析T/B(甲苯与苯的体积分数之比)的比值:该工业区大气环境中VOCs浓度主要受有机溶剂挥发的影响,工业区周围居民区大气环境中VOCs浓度主要受机动车尾气排放量的影响.%Volatile organic compounds(VOCs) data collected in the atmosphere of a typical industrial park in Shanghai in year 2009~2015 were analyzed in this paper.It was found that concentration of TVOC was high in winter and low in spring and summer.48 kinds of VOCs were detected in the atmosphere of this region.Among them,ethyl acetate,n-heptane,heptanes,and toluene accounted for 30%,11%,10%,and 7%,respectively.According to the ratio of T/B,we can concluded that concentrations of VOC in the atmosphere of this industrial park and the residential areas around the industrial park are mainly affected by the volatility of organic solvents and motor vehicle exhaust emissions,respectively.