ACIDITY OF SIZE-FRACTIONATED AEROSOL-PARTICLES

被引:27
作者
LUDWIG, J [1 ]
KLEMM, O [1 ]
机构
[1] UNIV BAYREUTH,INST HYDROL,W-8580 BAYREUTH,GERMANY
关键词
D O I
10.1007/BF00279508
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
At three locations in NE-Bavaria (Central Europe), aerosol particles were collected in five size fractions with a cascade impactor. The water soluble part of each fraction was analyzed for major ions and strong, weak and neutralizing acidities. For reliable determination of these categories of acidity, a comparison between different methods was initially performed. Further study revealed a distinct difference in amount and character of the acidity between fine (Dp < 1.35 μm) and coarse (Dp > 4.05 μm) particles. Fine particles always reacted acidic and their acidity was mainly due to strong acids. Concentrations were highest in polluted urban air, where additional weak organic acids were present in fine particles. The in situ pH's were calculated as pH 1...2 for these particles at all sampling sites. Coarse particles were only slightly acidic, with a mean in situ pH 5.5...6.5. Their acidity was mainly caused by weak acids, especially hydroxilized metal ions dominated by Al. © 1990 Kluwer Academic Publishers.
引用
收藏
页码:35 / 50
页数:16
相关论文
共 40 条