Chemical characteristics of Asian dust aerosol from Hunshan Dake sandland in Northern China

被引:50
作者
Cheng, TT [1 ]
Lu, DR
Wang, GC
Xu, YF
机构
[1] Fudan Univ, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China
[2] Chinese Acad Sci, Div Middle Atmosphere & Remote Sounding Theory &, Inst Atmospher Phys, Beijing 100029, Peoples R China
[3] Chinese Acad Sci, State Key Lab Atmospher Boundary Layer Phys & Atm, Inst Atmospher Phys, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
dust aerosol; Hunshan Dake Sandland; aerosol mass concentration; chemical element concentration;
D O I
10.1016/j.atmosenv.2004.12.045
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Dust aerosol was sampled at three sites in north China along the northern route of the dust events in spring 2001. Mass concentrations and concentrations of the chemical elements associated with aerosols were examined. The average mass concentration of TSP during the field period were 0.545 mg m(-3) at Sanggen Dalai tall-tower station, 0.366 mg m(-3) at Sanggen Dalai ground-based station, 0.360 mg m(-3) at Beijing, and 2.778 mg m(-3) at Sunite Zuoqi. The average concentrations of PM 10 accounted for more than 61% of TSP loadings at all stations. The average concentrations of special crustal elements (Al, Ca, Fe, Mg, Mn) in PM 10 accounted for 65-86% of each of their loadings in TSP, and the average concentrations of important pollutant elements (Pb, Zn, Cu) in PM10 accounted for 63-79% of each of their loadings in TSP. During the dusty days with wind speeds rising, the aerosol mass loading severely increased, and the trend of chemical element increasing in dust particles was associated with the aerosol loading ascending. Crustal elements in aerosols were dominated by dust particles. The chemical elements of Ca, Fe, Mg, Mn and Ti in aerosols were derived more from Ca-rich soil than from sandy soil, but Ba and K were opposite. The pollutant elements of Cu, S, Pb, V and Zn associated with aerosols in Hunshan Dake Sandland were affected by the anthropogenic pollutant sources in upwind regions. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2903 / 2911
页数:9
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