广州黄埔工业区近地层气溶胶分级水溶性成分的物理化学特征

THE PHYSICAL AND CHEMICAL FEATURES OF WATER- SOLUABLE COMPOSITION OF GRADED AEROSOLS IN THE SURFACE-LAYER OVER HUANGPU INDUSTRIAL AREA IN GUANGZHOU

通过对在黄埔工业区收集的气溶胶样品的质量谱与水溶性离子成分谱的分析表明 :总气溶胶质量与诸离子浓度均明显高于华南大陆的值 ,其分布表现为明显的 3峰分布 ,气溶胶中以 SO2 - 4,NO- 3 ,Ca2 +,NH+4 为主要的离子成分 ;较之华南陆地测站 ,除离子浓度成倍增加外 ,SO2 - 4的浓度占了阴离子含量的绝大部分 ,NO- 3 ,NH+4 的含量比重显著增加 ,以及 NO- 3 ,SO2 - 4,NH+4 ,K+较多地存在于细粒态粒子中是其主要特点。

Being analysed of mass spectrum and water soluable ion composition spectrum of aerosol samples collected at Huangpu industrial aera, it is shown that the total aerosol mass and ion density are obviously higher than those of inland station in South China, their distributions show a three peak pattern obviously, the main ion compositions in aerosol are SO 2- 4, NO - 3, Ca 2+ , NH + 4. Compared with the inland observation station in South China, besides the double increase of ions density, the density of SO 2- 4 accounts for the large part of the negative ions, the contents of NO - 3 and NH + 4 increase greatly, and the main features are that NO - 3, SO 2- 4, NH + 4 and K + exist mainly in mini particles.