Characteristics of mass distributions of aerosol particle and its inorganic water-soluble ions in summer over a suburb farmland in Beijing
- 46 Downloads
Agricultural activity is one of the most important sources of aerosol particles. To understand the mass distribution and sources of aerosol particles and their inorganic water-soluble ions in a suburb farmland of Beijing, particle samples were collected using a microorifice uniform deposit impactor (MOUDI) in the summer of 2004 in a suburb vegetable field. The distribution of the particles and their inorganic water-soluble ions in the diameter range of 0.18–18 μm were measured. The dominant fine particle ions were SO4 2−, NO3 −, and NH4 +. The association of day-to-day variation of the concentration of these ions with temperature, humidity, and solar radiation suggested that they are formed by the reaction of NH3 released from the vegetable field with the acid species produced from photochemical reactions. Fine particle K+ is likely from vegetation emission and biomass burning. Coarse particles like Ca2+, Mg2+, NO3 −, and SO4 2− are suggested to come from the mechanical process by which the soil particle entered the atmosphere, and from the reaction of the acid species at the surface of the soil particle. The results show that fertilizer and soil are important factors determining the aerosol particle over agricultural fields, and vegetable fields in suburban Beijing contribute significantly to the aerosol particle.
Keywordsmass size distribution coarse particle fine particle source
Unable to display preview. Download preview PDF.
- 1.Wang X F. A study on the atmospheric aerosol in winter in the city center and the suburb rural area of Beijing. J Beijing Normal Univ (Natl Sci), 1998, 34(3): 360–364 (in Chinese)Google Scholar
- 2.Dong J Q, Yang S J. Characteristics of the aerosol and study of their sources in Huabei clean area. Environ Chem, 1998, 17(1): 38–44 (in Chinese)Google Scholar
- 5.Marple V A, Rubow K L, Behm S M. A microorifice uniform deposit impactor (MOUDI): description, calibration and use. Aerosol Sci Technol, 1991, 14: 434–446Google Scholar
- 6.Sun Q R, Wang M R, Tian H H, Chen D H. Design of an annular denuder/cascade impactor system and measurement of acidity of fine particles. Acta Scienitae Circumstantiae, 1998, 18(1): 56–61 (in Chinese)Google Scholar
- 7.Wang M, Hu M. Major inorganic compositions in fine and coarse particles of ambient aerosol at Qingdao. Environ Sci, 2001, 22(5): 35–37 (in Chinese)Google Scholar
- 8.Hu M, Zhao Y L, He L Y, Huang X F, Tang X Y, Yao X H, Chan C K. Mass size distribution of Beijing particulate matters and its inorganic water-soluble ions in winter and summer. Environ Sci, 2005, 26(4): 1–6 (in Chinese)Google Scholar
- 12.Yang D Z, Yu X L, Li X S, Wang C, Parungo F, Nagamoto C. Characteristic analysis of aerosol at Lin’an air pollution background station. Sci Atmos Sinica, 1995, 19(2): 219–228 (in Chinese)Google Scholar
- 13.Li Y F, Cao S R. Size distribution of main inorganic anions in aerosol particles. Atmos Environ, 1989, 4(2): 19–23 (in Chinese)Google Scholar
- 14.Zhou F M, Shao K S, Hu M, Tang X Y. Concentrations of aerosol and related gases in Beijing. Environ Sci, 2002, 23(1): 11–15 (in Chinese)Google Scholar
- 23.Yu F L. Chemical composition and its source of fine particles in atmospheric aerosol of urban areas. Meteorol Monthly, 28(11): 3–6 (in Chinese)Google Scholar
- 24.Wang M. Study on chemical characterization of atmospheric particles in Qingdao. Dissertation for Master’s Degree. Beijing: Peking University, 1999, 39 (in Chinese)Google Scholar