摘要
大气挥发性有机物(VOCs)是大气光化学污染的重要前体物,研究其污染特征及来源对VOCs排放的管理和控制具有重要意义。该研究采用TH-300在线监测系统对苏州青剑湖大气VOCs进行在线观测,综合分析春季和夏季VOCs的污染水平及特征,运用PMF受体模型对VOCs进行来源解析。结果表明,春季和夏季VOCs体积分数分别为28.67×10^(-9)和31.26×10^(-9);日变化明显,呈双峰特征,早晚高峰出现峰值;运用特征物种比值法分析表明青剑湖VOCs主要来自周边工业园区污染排放;PMF模型解析显示机动车尾气、工业排放和涂料/溶剂使用是该区域VOCs的主要来源,尤其在臭氧污染时段,VOCs主要来自溶剂/涂料使用和工业排放。
Volatile organic compounds（VOCs） are key precursors of atmospheric photochemical pollution, so it is of significance to investigate their characteristics and sources for the purpose of efficient VOCs emission control. In this paper, atmospheric VOCs were observed by use of TH-300 on-line monitor system in Qingjian Lake area in Suzhou City. The investigation involved integrated analysis of VOCs concentration levels and the characteristics in spring and summer, respectively;source apportionment of VOCs was performed using a receptor model of positive matrix factorization（PMF）. Results of the investigation showed that the average volume fraction of total VOCs in spring and summer was 28.67×10^-9 and 31.26×10^-9, respectively; and the diurnal variations of the total VOCs presented two evident peaks which appeared in the morning and evening rush hours. Furthermore, a major VOCs source of the industrial park surrounding Qingjian Lake was identified according to the analysis by a species-ratio method; and the PMF analysis suggested that vehicle exhaust, industrial emissions and extensive use of solvent/coating were the major sources for the ambient VOCs in this area, especially during the severe ozone pollution period, VOCs mainly came from solvent/coating and industrial emissions.
作者
刘金荣
张宁红
汤莉莉
姚沈良
王壮
张茹
杨笑笑
花艳
周宏仓
LIU Jinrong;ZHANG Ninghong;TANG Lili;YAO Shenliang;WANG Zhuang;ZHANG Ru;YANG Xiaoxiao;HUA Yan;ZHOU Hongcang(Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology（CICAEET）,Nanjing University of Information Science ＆ Technology,Nanjing 210044,China;Environmental Protection Department of Jiangsu Province,Nanjing 210036,China;Jiangsu Environmental Monitoring Center,Nanjing 210036,China;Environmental Monitoring Station of Suzhou Industrial Park,Suzhou 215000,China;Institute for Environment and Climate Research,Jinan University,Guangzhou 510632,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2018年第8期126-134,共9页
Environmental Science & Technology
基金
国家自然科学基金重大研究计划(D0512
91544231)
国家重点研发计划(2016YFC0200505)
江苏省环保科研课题(2015017)
关键词
苏州青剑湖
挥发性有机物
污染特征
来源解析
Qingjian Lake in Suzhou
VOCs
pollution characteristics
source apportionment
