贵阳市大气细颗粒物PM_(2.5)来源解析研究  

Source Apportionment of Ambient PM_(2.5)in Guiyang

作　　者：李勇 LI Yong(School of Chemical Engineering,Guizhou Minzu University,Guizhou Guiyang 550025,China)

机构地区：[1]贵州民族大学化学工程学院,贵州贵阳550025

出　　处：《广州化工》2023年第13期184-186,共3页GuangZhou Chemical Industry

摘　　要：2020年7月-2021年6月在贵阳市选取2个采样点位,采集不同季节的大气PM_(2.5)样品,且测定了PM_(2.5)及其中无机元素、水溶性离子、有机碳(OC)和元素碳(EC)的含量,建立贵阳市PM_(2.5)受体成分谱,并利用化学质量平衡模型(CMB)对PM_(2.5)来源进行解析。结果显示,贵阳市大气PM_(2.5)中的主要成分包括水溶性二次离子和碳组分,其主要来源是二次硫酸盐、汽车尾气尘、燃煤尘和二次硝酸盐,贡献率依次为33.18%、24.78%、20.75%和8.02%。Samples of PM_(2.5)were collected from July 2020 to June 2021 at two sites in Guiyang City.The concentration of PM_(2.5),inorganic elements,water-soluble ions,organic carbon(OC)and elemental carbon(EC)in the sample were determined,and the chemical profiles of ambient PM_(2.5)was established.The sources of PM_(2.5)in Guiyang City were analyzed based on the chemical mass balance(CMB)receptor model.The results showed that the main components of atmospheric PM_(2.5)in Guiyang include water-soluble secondary ions and carbon components,and secondary sulfate,automobile tail gas dust,coal dust and secondary nitrates were the important sources of PM_(2.5),with contributions of 33.18%,24.78%,20.75%and 8.02%,respectively.

关 键 词：PM_(2.5) 成分谱 CMB受体模型 源解析 

分 类 号：X513[环境科学与工程—环境工程]