Properties of nitrate, sulfate and ammonium in typical polluted atmospheric aerosols (PM10) in Beijing

被引:46
作者
Kai, Zhang
Wang Yuesi [1 ]
Wen Tianxue
Yousef, Mesmani
Frank, Murray
机构
[1] Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
[3] Atom Energy Commiss, AECS, Dept Safety & Protect, Environm Protect Div, Damascus, Syria
[4] Murdoch Univ, Sch Environm Sci, Murdoch, WA 6150, Australia
基金
中国国家自然科学基金;
关键词
water soluble ions; nitrate; sulfate; ammonium; heavy pollution; PM10;
D O I
10.1016/j.atmosres.2006.05.004
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
To gain an understanding of the characteristics of nitrate, sulfate and ammonium in the urban atmosphere of Beijing, an experiment was conducted in October 2004, using a method involving the rapid collection of particles and analysis using an ion chromatography system. The study shows that the mean concentration of water soluble ions (WSI) increased during heavily polluted weather, and this change in the concentration of pollutants was related to the meteorological background. The concentration of nitrate, sulfate and ammonium increased 7.9,4.1 and 5.4 times, respectively, during heavily polluted periods. The concentration of nitrate increased most among the WSI in PM10. The diumal variations of nitrate, sulfate and ammonium in more polluted periods were different from those in less polluted periods. The highest concentration of nitrate (NO3-), sulfate (SO42-), and ammonium (NH4+) appeared at 19:00 during more polluted periods. In contrast, the highest concentrations of these compounds occurred at noon during less polluted periods. A correlation analysis showed that NO3-, SO42-, NH4+, nitrogen oxides (NOx) and sulfur dioxide (SO2) had significant positive correlations in more polluted periods. The transformation ratio from SO2 and NOx to SO42- and NO3- was higher in more polluted than that in less polluted periods. (c) 2006 Elsevier B.V All rights reserved.
引用
收藏
页码:67 / 77
页数:11
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