摘要
2020年在徐州市新城区持续开展大气细颗粒物外场采样和实验室样品分析,同步收集了常规污染物在线观测数据。结果表明:监测期间PM_(2.5)质量浓度为58.7μg/m^(3),二次无机离子(SNA,52.4%)和有机物(OM,15.3%)污染较为突出。ρ(OC)/ρ(EC)平均值为3.77,说明OC存在明显的二次生成。ρ(NO_(3)^(-))/ρ(SO_(4)^(2-))为1.86,该区域水溶性离子受移动源的影响大于固定源。PMF对PM_(2.5)解析结果显示,二次无机离子、燃煤源、机动车排放源、工业源、生物质燃烧和扬尘源贡献占比分别为47.7%,5.9%,6.2%,5.0%,5.1%和2.9%。
Field sampling and laboratory analysis of fine particulate matter in the atmosphere were carried out continuously in the new urban district of Xuzhou,and remote-sensing data were collected simultaneously.The results showed that the mass concentration of PM_(2.5)was 58.7μg/m^(3).Secondary inorganic aerosols(52.4%)and organic matter(15.3%)were the most abundant component in PM_(2.5),The value ofρ(OC)/ρ(EC)was 3.77,indicated that common existence of SOC from secondary reactions.The average value ofρ(NO_(3)^(-))/ρ(SO_(4)^(2-))was 1.86,which indicated that water-soluble ions were mainly more affected by the mobile sources than the fixed sources.PMF model analysis results of PM_(2.5)showed that the contribution of secondary inorganic aerosols,coal burning sources,vehicle emissions sources,industrial sources,biomass combustion and dust sources were 47.7%,5.9%,6.2%,5.0%,5.1%and 2.9%,respectively.
作者
李昌龙
李克诚
饶永才
LI Chang-long;LI Ke-cheng;RAO Yong-cai(Jiangsu Xuzhou Environment Monitoring Center,Xuzhou 221002,China;Qilu University of Technology,School of Materials Science and Engineering,Ji'nan 250353,China)
出处
《环境科技》
2021年第4期69-73,共5页
Environmental Science and Technology
基金
江苏省PM_(2.5)与臭氧协同控制重大专项(2019023)。
关键词
PM_(2.5)
组分
水溶性离子
无机元素
来源解析
PMF
PM_(2.5)
Carbonaceous composition
Water-soluble ions
Inorganic elements
Source apportionment
PMF
