Abstract:Aerosol samples were collected in 2010~2011at urban and suburban sites of Nanjing. Meanwhile the major water-soluble ions of aerosol were determined by ion chromatography (IC) method. The results show that during the sampling period, the aerosol pollution of Nanjing at both sites were more serious in spring, autumn and winter except in summer. The size distribution of aerosol showed two peaks in 0.65~2.1 μm and 5.8~9 μm at both sites. The mass concentration of PM2.5 had great impact on the visibility. The total mass concentration of water-soluble inorganic ions in aerosol was higher in spring and winter compared with that in summer and autumn. The total mass concentration of anions was significantly higher than the cations in the whole year, which were especialy distinct in the fine particles. The proportion of water-soluble inorganic ions in aerosol was higher at urban site than that at suburban site in summer, autumn and winter. The ratio of NO3-/SO42- was lower than 1at two sites, which reflected that the stable sources (such as coal combustion) was a major source of atmospheric pollutants. The ratio of NO3-/SO42- had obvious seasonal variations, the lowest of which was in summer and the highest was in winter. NH4+, K+, NO3-and SO42- were mainly enriched in the fine particles; Na+, Cl-and NO2- were enriched both in fine and coarse particles; Ca2+, Mg2+ and F- were mainly enriched in the coarse particles. The results of factor analysis (FA) showed that there were 3main sources of aerosol.
张秋晨, 朱彬, 龚佃利. 南京地区大气气溶胶及水溶性无机离子特征分析[J]. 中国环境科学, 2014, 34(2): 311-316.
ZHANG Qiu-Chen, ZHU Bin, GONG Dian-Li. Characterization of water-soluble ion species of aerosol in Nanjing, China. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(2): 311-316.