青岛沿海地区大气气溶胶浓度与主要无机化学组成

从 1 997 0 9～ 1 998 1 1期间 ,5次监测大气气溶胶 ,获得了青岛沿海地区气溶胶 (TSP、PM10 、PM2 5)的质量浓度 .气溶胶中直径 <2 5μm的细粒子质量浓度约占TSP总浓度的 50 % ;<1 0 μm的粒子的质量浓度则占TSP总浓度的 75% .对气溶胶中主要可溶性离子组分的分析表明 :TSP中可溶性离子的质量浓度占总质量浓度的4 0 %以上 .其中主要可溶性离子为SO2 - 4、NO- 3 、NH+4 .这 3个离子的质量浓度约占可溶性离子总浓度的 70 % ,而且主要存在于细粒子中 ,表明其主要来自二次气溶胶 .冬季气溶胶浓度大大高于其它季节 .

Five times measurements of atmosphere aerosol were conducted from September,1997 to November,1998 at a coastal site of Qingdao.The mass concentrations of aerosol and their main soluble compositions were measured.The mass concentration and seasonal variation of the aerosol and its composition were discussed by different size.The PM 2 5 ( d <2 5μm)mass concentration accounts for half of the TSP,while the PM 10 ( d <10μm)mass concentration is about 75% of the TSP.More than 40% of the TSP mass concentration are from that of the soluble ions,among which SO 2- 4,NO - 3 and NH + 4 are the primary ones.SO 2- 4、NH + 4、NO - 3 are mainly in fine particles which suggest that they mainly existed in secondary aerosols.The mass concentrations of TSP in winter are much higher than those in other seasons.