沈阳市臭氧与前体物的非线性关系及生成潜势研究  

作　　者：任万辉 苏枞枞 刘宁微[2] 徐鹏 任甜 张霄 周思宁 赵全 

机构地区：[1]辽宁省沈阳生态环境监测中心,辽宁沈阳110000 [2]中国气象局沈阳大气环境研究所,辽宁沈阳110016 [3]辽宁省生态环境保护科技中心,辽宁沈阳110161

出　　处：《环境保护与循环经济》2024年第12期73-79,共7页environmental protection and circular economy

摘　　要：利用2019年沈阳市11个环境空气质量监测点位和3个挥发性有机物监测点位污染物浓度观测数据,研究了O_(3)与前体物(NO_(X)和VOCs)的非线性关系,计算了二次有机气溶胶(SOA)和O_(3)生成潜势。结果表明:与NO_(X)减排相比,VOCs减排对降低O_(3)浓度的效应要显著得多,这种趋势在春、夏季占比高达84.5%;而仅减排NO_(X)或NO_(X)减排比例大于VOCs,反而会造成O_(3)浓度升高。对O_(3)生成潜势贡献由大到小的VOCs依次是芳香烃、烯烃和烷烃,甲苯和异戊二烯是贡献率最大的两个物种。对SOA生成潜势贡献由大到小的VOCs依次是芳香烃、烷烃和烯烃,甲苯和苯的合计贡献高达70%以上。Using the 2019 pollutant concentration observation data from 11 environmental air quality monitoring sites and 3 volatile organic compound monitoring sites in Shenyang,the nonlinear relationship between O_(3)and its precursors(NO_(X)and VOCs)was studied,and the potential for secondary organic aerosols(SOA)and O_(3)generation was calculated.The results show that compared with NO_(X)reduction,VOCs reduction has a much more significant effect on reducing O_(3)concentration,with this trend accounting for up to 84.5%in spring and summer;However,only reducing NO_(X)or a higher proportion of NO_(X)emissions than VOCs can actually cause an increase in O_(3)concentration.The VOCs with the highest potential contribution of O_(3)generation in descending order are aromatic hydrocarbons,olefins,and alkanes,with toluene and isoprene being the two species with the highest contribution rates.The VOCs that contribute to the potential of SOA generation in descending order are aromatic hydrocarbons,alkanes,and olefins,with toluene and benzene contributing over 70%in total.

关 键 词：O_(3) 前体物 生成潜势 沈阳 

分 类 号：X502[环境科学与工程—环境工程]