Characteristics of Inorganic Water-soluble Ions from Aerosols in Beijing-Tianjin-Hebei Area
Characteristics of Inorganic Water-soluble Ions from Aerosols in Beijing-Tianjin-Hebei Area
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发表时间：
2011
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通讯作者：
Liu Huai-yu
中科院分区：
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作者：
Liu Huai-yu
PM2.5 samples were collected at five sites in BTH(Beijing Tianjin and Hebei) area(four urban sites of Beijing,Tianjin,Shijiazhuang,Chengde,and one site of Shangdianzi background station) from 2009 to 2010.The inorganic water-soluble ions were analyzed and spatio-temporal characteristics of ions were concluded.The concentrations of PM2.5 were quite high,with annual average more than 100μg/m3 in Beijing,Tianjin and Shijiazhuang.The annual average concentrations of secondary ions(SO2-4,NO-3,NH+4) were 22-75 μg/m3 at five sites,and higher in the spring and summer.In BTH,SO2-4 concentrations were much higher than NO-3 in the summer,and Mg2+ and Ca2+ were higher in the spring.Mg2+ and Ca2+ were much higher in Tianjin and Shijiazhuang,reflecting more crust materials pollution.The characteristics of PM2.5 and water-soluble ions for Beijing in this paper were very different from the similar studies before 2004,showing more stable PM2.5 concentrations in four seasons,higher secondary ions in summer,and higher NO-3/SO2-4 than before.The results of Shangdianzi background station(SDZ) also showed that the aerosol pollution of SDZ was largely influenced by Beijing urban area.
