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Characteristics of the water-soluble components of aerosol particles in hefei,China

Journal of Environmental Sciences 2016年第4期28卷 32-40页

作者： Xue-liang Deng Chun-e Shi Bi-wen Wu Yuan-jian Yang Qi Jin Hong-lei Wang Song Zhu Caixia Yu Anhui Institute of Meteorology Key Laboratory of Atmospheric Science and Satellite Remote Sensing Hefei 230031 China Anhui Weather Modification Hefei 230031 China Key Laboratory for aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science and Technology Nanjing 210044 China hefei Meteorological Bureau Hefei 230041 China

size-classified daily aerosol mass concentrations and concentrations of water-soluble inorganic ions were measured in hefei,China,in four representative months between September 2012 and August *** annual average mass concentration of 169.09μg/m^3 for total suspended particulate（TSP）was measured using an Andersen Mark-II cascade *** seasonal average mass concentration was highest in winter（234.73μg/m^3）and lowest in summer（91.71μg/m^3）.water-soluble ions accounted for 59.49%,32.90%,48.62%and 37.08%of the aerosol mass concentration in winter,spring,summer,and fall,respectively,which indicated that ionic species were the primary constituents of the atmospheric *** four most abundant ions were NO3^-,SO4^2-,Ca^2＋ and NH4^＋.With the exception of Ca^2＋,the mass concentrations of water-soluble ions were in an intermediate range compared with the levels for other Chinese ***,nitrate,and ammonium were the dominant fine-particle species,which were bimodally distributed in spring,summer and fall;however,the size distribution became unimodal in winter,with a peak at 1.1–2.1μ*** Ca^2＋ peak occurred at approximately 4.7–5.8μm in all *** cation to anion ratio was close to 1.4,which suggested that the aerosol particles were alkalescent in *** average NO3^-/SO4^2-mass ratio was 1.10 in hefei,which indicated that mobile source emissions were *** positive correlation coefficients between the concentrations of NH4^＋ and SO4^2-,NH4^＋ and NO3^-,SO4^2-and NO3^-,and Mg^2＋ and Ca^2＋ were also indicated,suggesting that aerosol particles may be present as（NH4）2SO4,NH4HSO4,and NH4NO3.

关键词： aerosol water-soluble ions hefei size distribution

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