Characteristics of Water Soluble Ions in Atmospheric Aerosol on Clear and Hazy Days at Lin’an Regional Background Station, China

Abstract:

To investigate the characteristics of size distributions and water-soluble ions compositions of atmospheric aerosol in different weather conditions in the area of Yangtze River delta in China, aerosol samples were collected with Andersen cascade sampler on typical clear and hazy days at Lin’an regional background station. The water-soluble ionic concentrations were analyzed by the ion chromatography (IC). Results showed the concentrations of SO42-, NO3-, NH4+ and K+ on hazy days were 20.14, 17.45, 10.30, and 1.27µg m-3 in fine particles, respectively, and the concentrations of NO3-, NH4+ and K+ were 14.50, 2.35 and 0.50µg m-3 in coarse particles, respectively. This was 1.1-2.9 times higher than on clear days. The concentrations of Ca2+, Na+, Mg2+ and Cl- on hazy days were 2.67, 1.33, 0.37, and 1.03µg m-3 in fine particles, respectively, and the concentrations of Ca2+, Na+, Mg2+, Cl- and SO42- were 4.34, 1.27, 0.41, 0.89 and 2.08µg m-3 in coarse particles, respectively. This was 0.6-0.9 times lower than on clear days. K+ and secondary particles including sulfate, nitrate and ammonium came from the long-range transport which mainly from the area of Yangtze River delta, which was the main cause of formation of haze.

• Periodical: Advanced Materials Research (Volumes 356-360)
• Pages: 2233-2238
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.2233
• Online since: October 2011
• Authors: Hong Hui Xu, Jie Liu, Min Juan Mao, Jie Yao
• Keywords: Aerosol, Regional Background Station, Size Distribution, Water-Soluble Ions

References

[1] Q.Y. Fu, G.S. Zhuang, J. Wang, et al: Atmospheric Environment, Vol. 42 (2008), p.2023.

[2] H. Christoph, G. Robert, B. Urs, G. Martin, et al: Atmospheric Environment, Vol. 39 (2005), p.637.

[3] N. Englert: Toxicology Letters, Vol. 149 (2004), p.235.

[4] J. H. Seinfeld, S. N Pandis: Atmospheric Chemistry and Physics- from air pollution to climate change(John Wiley & Sons, New York 1998)

[5] T. Wang, C.H. Wong, T.F. Cheung, et al: Journal of Geophysical Research, Vol. 109 (2004), D19S05.

DOI: 10.1029/2003JD004119

[6] J Xu, M.H. Bergin, X. Yu, et al: Atmospheric Environment, Vol. 36 (2002), p.161.

[7] J Xu, M.H. Bergin, R. Greenwald: Journal of Geophysical Research, Vol. 108 (2003), D2, 4060.

DOI: 10.1029/2002JD002550

[8] Y. Wang, G. S. Zhuang, X. Y. Zhang, et al: Atmospheric Environment, Vol. 40 (2006), p.2935.

[9] X. H. Yao, A. P. S. Lau, M. Fang, et al: Atmospheric Environment, Vol. 37 (2003), p.2991.

[10] Y. Wang, G. S. Zhuang, A. H. Tang, et al: Atmospheric Environment, Vol. 39 (2005), p.3771.