title: [Chemical characteristics of water-soluble components of aerosol particles at different altitudes of the Mount Huang in the summer].
abstract: Aerosol was collected with Anderson cascade sampler at three altitudes of the Mount Huang in the summer 2011. Samples were analyzed by the ion chromatography (IC, Metrohm). The results showed that the mean mass concentrations of all the ions were 13.21 microg x m(-1), 10.94 microg x m(-3), 9.97 microg x m(-3), at the foot, mid height and the summit of the mountain, respectively. The mass concentration of water-soluble components of aerosol decreased with altitude. The major anion and cation of aerosols were SO4(2-) and NH4+, respectively. The descending order of mass concentration of major ionic species was: SO4(2-) > NH4+ > Ca2+ > NO3- and NH4+ account for about 75% of total ionic concentrations of PM2.1 in three sampling sites. The concentration of SO4(2-) and NH4+ decreased conspicuously with altitude. The major cation and anion of coarse mode particles were Ca2+ and NO3-, respectively. The slope of the linear regression line between anion and cation of PM10 and PM2.1 approximates 1, indicating acid-base balance in aerosol particles. Aerosols over the region Mount Huang were influenced by anthropogenic source of surrounding areas to a certain extent. The result also suggested that the correlation between NH4+ and SO4(2-) was 0. 98 and these ions predominantly existed in the form of (NH4)2SO4 and NH4HSO4. Backward trajectory analysis revealed that the air mass was originated from southern coastal regions, the East China Sea, the Yellow Sea and the northern China. Due to the northern air masses go through heavily polluted areas, concentrations of water-soluble ions in these air masses were higher than that of other air masses. The concentration of K+ in northern air mass was several times higher than that in southwestern air mass.
authors.affiliation: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science Technology, Nanjing 210044, China. wenbinqz@163.com
authors.forename: Bin
authors.initials: B
authors.lastname: Wen
authors.forename: Yan
authors.initials: Y
authors.lastname: Yin
authors.forename: Yan-shuo
authors.initials: YS
authors.lastname: Qing
authors.forename: Kui
authors.initials: K
authors.lastname: Chen
mesh_terms: D000336:Aerosols / Q000032:analysis* / Q000737:chemistry; D000393:Air Pollutants / Q000737:chemistry*; D000531:Altitude; D001272:Atmosphere / Q000032:analysis; D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D007477:Ions / Q000032:analysis / Q000737:chemistry; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012995:Solubility; D013456:Sulfur Acids / Q000032:analysis
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D007477:Ions; D052638:Particulate Matter; D000644:Quaternary Ammonium Compounds; D013456:Sulfur Acids