Characterization of Atmospheric Aerosol over XiAn in the South Margin of the Loess Plateau, China

被引:140
作者
Zhang, XY
Cao, JJ
Li, LM
Arimoto, R
Cheng, Y
Huebert, B
Wang, D
机构
[1] Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Peoples R China
[2] XiAn Environm Monitoring Stn, Xian 710054, Peoples R China
[3] New Mexico State Univ, Carlsbad Environm Monitoring & Res Ctr, Carlsbad, NM 88220 USA
[4] Univ Hawaii, Dept Oceanog, Honolulu, HI 96882 USA
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
TSP; PM-10; elements; sulfate; nitrate; ammonium products;
D O I
10.1016/S1352-2310(02)00347-3
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The mass concentrations of TSP, PM-10, several secondary aerosol species, and up to 20 elements were determined for bulk aerosol samples collected from four ground-based monitoring sites in XiAn, China. The samples were collected during four seasons from September 1996 to August 1997; and in July 1998. Daily concentrations of TSP, SO2 and NOx from 1995 to 1997 were also obtained from the same sampling sites. Representative concentrations (annual averages) of TSP, SO2 and NOx were 410, 39, 43 mug m(-3), respectively. PM- 10 accounted for about 60-70% of TSP in summer 1998. The most abundant elements in the samples were Si, Ca, Al, Fe, Cl, P, K and S. A fraction of the Ca, which in typically associated with dust, was from non-crustal sources, especially in coarse particles. In winter, the element with the highest concentration was S, and it was primarily in the form of sulfate. The seasonal mean sulfate concentrations, averaged over all sites, were 100, 340, 59 and 27 mug SO42- m(-3) for autumn, winter, spring and summer, respectively. The corresponding loadings of ammonium ion were 49, 140, 40 and 17 mug NH4+ m(-3) for the same seasons and those for nitrate were 22, 65, 33, 16 mug NO3- m(-3). Dispersed sources of coal-combustion (most likely residential heating), as opposed to stationary point sources, evidently play an important role in the large increases in TSP and three-fold increases in sulfate, nitrate and ammonium loading during XiAn's space-heating season. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:4189 / 4199
页数:11
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