沈阳市环境空气PM10中有机碳和元素碳污染特征及来源研究  

Characteristics and Sources Analysis of Organic Carbon and Elemental Carbon in PM 10 in Shenyang City

作　　者：李哲 李晶[1] 王帅[1] 郑兴宝[1] 曲健[1] Li Zhe;Li Jing;Wang Shuai;Zheng Xingbao;Qu Jian(Shenyang City Environmental Monitoring Center Station,Shenyang 110016,China)

机构地区：[1]沈阳市环境监测中心站,辽宁沈阳110016

出　　处：《环境科学与管理》2020年第5期113-117,共5页Environmental Science and Management

基　　金：国家重点研发计划大气专项(2017YFC0212501)。

摘　　要：通过分析沈阳市环境空气四季PM10中有机碳和元素碳质量浓度,研究环境空气PM10中有机碳、元素碳的污染特征。沈阳市秋冬季PM10中OC、EC质量浓度较高,春夏季较低,且秋冬季所占PM10质量分数高于春夏季;冬春夏秋PM10中EC和OC的相关系数R分别是0.73、0.56、0.47和0.97;SOC浓度分别为7.32μg·m^-3、5.39μg·m^-3、2.26μg·m^-3和2.04μg·m^-3;进一步对OC1、OC2、OC3、OC4、EC1、EC2、EC3和OPC碳组分浓度进行主成分分析,主要污染源来自柴油和汽油车尾气和化石燃料燃烧,贡献率达到82.3%~93.9%。The pollution characteristics of organic carbon and elemental carbon in PM10 were studied by analyzing organic carbon and elemental carbon in Shenyang area.The concentration of OC and EC of autumn and winter was higher while the mass fraction of autumn and winter was higher than that of spring and summer.The correlation coefficients R of EC and OC in PM10 were 0.73,0.56,0.47 and 0.97,respectively.The SOC concentrations of different season were 7.32μg·m^-3,5.39μg·m^-3,2.26μg·m^-3 and 2.04μg·m^-3,respectively.Principal component analysis was further performed on the carbon component concentrations of OC1,OC2,OC3,OC4,EC1,EC2,EC3 and OPC.The main origins were diesel and gasoline vehicle exhaust and fossil fuel combustion with a contribution rate of 82.3%~93.9%.

关 键 词：环境空气 PM10 有机碳 元素碳 

分 类 号：X513[环境科学与工程—环境工程]