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江苏省城区VOCs污染特征及其关键活性物种识别
投稿时间:2020-09-10    点此下载全文
引用本文:秦艳红,秦玮,蒋自强,刘笑媛,杜嵩山,袁琦.江苏省城区VOCs污染特征及其关键活性物种识别[J].南京信息工程大学学报,2020,12(6):714~720
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作者单位E-mail
秦艳红 江苏省环境监测中心, 南京, 210019  
秦玮 江苏省环境监测中心, 南京, 210019  
蒋自强 江苏省环境监测中心, 南京, 210019 zqjiang86@163.com 
刘笑媛 江苏省苏力环境科技有限责任公司, 南京, 210036  
杜嵩山 江苏省环境监测中心, 南京, 210019  
袁琦 江苏省苏力环境科技有限责任公司, 南京, 210036  
基金项目:江苏省PM2.5和臭氧污染协同控制重大专项(2019023);国家自然科学基金(41601193);江苏省自然科学基金(BK20160622);国家重点研发计划(2016YFC0200506);江苏省环境监测科研基金(1918)
中文摘要:利用2019年8月13日—9月30日江苏省13个设区市离线监测的VOCs数据,对江苏省城区VOCs污染特征及其关键活性组分进行分析研究.结果表明,江苏省逐日VOCs的体积分数范围为8.83×10-9~45.11×10-9,表现为烷烃 > 芳香烃 > 烯烃 > 炔烃.江苏省13个设区市VOCs的体积分数为7.85×10-9~30.52×10-9,徐州市VOCs最高,这与徐州市监测点位置分布及其工业结构相关.全省13个设区市臭氧浓度处于优、良、轻度污染和中度污染时,VOCs总体积分数分别为14.96×10-9、17.96×10-9、25.85×10-9和25.11×10-9,臭氧浓度处于污染状态时的VOCs高于优、良状态,且炔烃占比随着臭氧污染程度的加重呈升高趋势,表明现阶段臭氧生成与人类活动关系密切.通过加权的方式筛选出间/对二甲苯、乙烯、甲苯、丙烯、异戊二烯、邻二甲苯等物种,它们是目前对江苏省城区影响程度较大且影响范围较广的关键活性物种.
中文关键词:挥发性有机物(VOCs)  污染特征  活性物种  臭氧
 
Characteristics and reactive species of volatile organic compounds in Jiangsu province
Abstract:We analyzed the characteristics of volatile organic compounds (VOCs) and their key active components in Jiangsu province using the VOCs data monitored in urban areas of Jiangsu's 13 cities from August 13th to September 30th,2019.The results showed that the daily concentration of VOCs in Jiangsu ranged from 8.83×10-9 to 45.11×10-9,with alkanes being dominant and followed by aromatics,alkenes,and alkynes.The concentration of VOCs in 13 cities ranged from 7.85×10-9 to 30.52×10-9,which was highest in Xuzhou due to the location of its monitoring station as well as its industrial structure.When the ambient ozone concentration was excellent,good,light pollution,and moderate pollution,the total VOCs were 14.96×10-9,17.96×10-9,25.85×10-9,and 25.11×10-9,respectively.On the whole,the VOCs concentration was higher when the ozone was in pollution level,and the proportion of alkyne in VOCs increased with the aggravation of ozone pollution,indicating the close relation between ozone generation and human activities.Species including m/p-xylene,ethylene,toluene,propylene,isoprene and o-xylene,were screened out by weighting,which were the key species that had large and extensive impact on ambient VOCs of Jiangsu province.
keywords:volatile organic compounds(VOCs)  pollution characteristics  active species  ozone
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