新乡市大气细颗粒物中碳质气溶胶的污染水平、季节特征及来源追踪

摘要：

为了探究典型“2+26”传输通道城市之一的新乡市PM2.5中碳质气溶胶的污染水平、季节分布及来源特征,于2019年7月至2020年4月在betway官方app 采集PM2.5样品,采用热/光碳分析仪测定了8种碳组分质量浓度.结果显示,新乡市PM2.5年均质量浓度为(66.25±35.73)μg·m-3,TCA(Total Carbonaceous Aerosol)/PM2.5质量浓度比年均为(25.16±6.93)%,说明新乡市碳组分污染较为严重.碳组分具有显著的季节变化特征,冬季OC(Organic Carbon)和EC(Elemental Carbon)的质量浓度分别为(13.50±6.43)μg·m-3和(5.67±2.32)μg·m-3,明显高于其他季节,说明冬季污染较为严重.SOC(Secondary Organic Carbon)/OC质量浓度比值夏季最高(49.37±17.73)%,冬季最低(39.06±15.83)%.OC和EC的相关性冬春季(R2=0.70和0.58)明显高于夏秋季(R2=0.51和0.34),表明冬春季碳组分来源相似.地理来源分析发现,河南省西部、湖北省北部等是其潜在贡献源区.

In order to explore the pollution level,seasonal distribution and source characteristics of carbonaceous aerosol in PM2.5in Xinxiang,which was one of the2+26Transmission Channel Cities,PM2.5samples were collected from July 2019 to April 2020 at the site of Henan Normal University.The mass concentrations of eight carbon fractions were analyzed by a thermal/optical carbon analyzer.The results indicated that the average annual concentration of PM2.5was(66.25±35.73)μg·m-3,and total carbonaceous aerosol(TCA)accounted for(25.16±6.93)%of PM2.5during the whole observation period,showing that the pollution of carbon components was serious in Xinxiang.The carbonaceous components exhibited obvious seasonal variation characteristics.The mass concentrations of OC(Organic Carbon)and EC(Elemental Carbon)in PM2.5in winter were(13.50±6.43)and(5.67±2.32)μg·m-3,respectively,which were obviously higher than that in other seasons,indicating that the carbon components were polluted seriously in winter.The highest SOC(Secondary Organic Carbon)/OC mass concentrations ratio was observed in summer(49.37±17.73)%and the lowest value in winter(39.06±15.83)%.The correlation coefficients between OC and EC were higher in winter and spring(R2=0.70 and 0.58,respectively)than in summer and autumn(R2=0.51 and 0.34,respectively),illustrating that the OC and EC in winter and spring had common sources.According to the analysis results of the geographical sources,we found that the west of Henan Province and the north of Hubei Province were the potential contribution areas for carbonaceous components in PM2.5.FEWER

作者：

赵文鹏 贾梦珂 李洋 肖晴晴 徐肃阳 洪启航 宋天颂 刘永丽 刘桓嘉

Zhao Wenpeng;Jia Mengke;Li Yang;Xiao Qingqing;Xu Suyang;Hong Qihang;Song Tiansong;Liu Yongli;Liu Huanjia(Xinxiang Ecology and Environmental Monitoring Center of Henan,Xinxiang 453004,China;School of Environment,Henan Normal University,Xinxiang 453007,China;Daxing Environmental Protection Monitoring Station of Beijing,Beijing 102600,China)

机构地区：

河南省新乡生态环境监测中心 betway官方app 环境学院 北京市大兴区环境保护监测站

出处：

《betway官方app 学报:自然科学版》 CAS 北大核心 2023年第3期136-148,共13页

Journal of Henan Normal University(Natural Science Edition)

基金国家自然科学基金(42007204) 河南省科技攻关项目(222102320394) betway官方app 国家级科研项目培育基金(2021PL23) betway官方app 博士科研启动经费支持项目(5101219170138).

关键词：

碳质气溶胶 PM2.5 污染特征 来源解析 新乡市

carbonaceous aerosol PM2.5 pollution characteristics source apportionment Xinxiang

分类号：
X513 [环境科学与工程—环境工程]

新乡市大气细颗粒物中碳质气溶胶的污染水平、季节特征及来源追踪.pdf