Characterization of water-soluble species of PM10 and PM2.5 aerosols in urban area in Nanjing, China

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• 作者：Wang ; Gehui ; Huang ; Liming ; Gao ; Shixiang ; Gao ; Songting ; Wang ; Liansheng
• 关键词：PM10 and PM2.5 aerosols ; Water-soluble matters ; pH ; Conductivity ; TOC ; IC ; Elements and ions
• 刊名：Atmospheric Environment
• 出版年：2002
• 期刊代码：11_13522310
• 类别：env
• 出版时间：March, 2002
• 卷：36
• 期：8
• 页码：1299-1307
• 文件大小：118 K

摘要

The characterization for water-soluble species of PM10 (particle matter with aerodynamical diameter <10μm) and PM2.5 (particle matter with aerodynamical diameter <2.5μm) in five sites of Nanjing, China was carried out during February–May 2001.The pH and conductivity K of water-soluble matters of PM10 and PM2.5 were determined, and the water-soluble fraction of the sample was followed to identify the total carbon (TC), total organic carbon (TOC), inorganic carbon (IC), elements, NO₃⁻, SO₄²⁻ and NH₃-N.The experimental results show that water-soluble matters of PM10 and PM2.5 in Nanjing are acidic, and the pH of PM2.5 is lower than PM10. Conductivity of water-soluble species of PM10 and PM2.5 aerosols varied over a wide range from 1087 to 225μs/cm. Conductivity between PM10 and PM2.5 has a linear correlationship, and the equation is Y=0.8459X+44.74, r²