重庆市大气总悬浮颗粒物来源解析

于2001至2002年在重庆市7个采样点采集了TSP，并收集了7类尘污染源的TSP样品。对受体和源样品进行无机元素、有机碳、元素碳及水溶性离子分析，得到受体和源成分谱，用CMB模型解析了重庆市大气TSP来源。结果发现：各源类对TSP贡献率为扬尘30%、建筑尘25%、煤烟尘18%、机动车尘10%、钢铁尘8%、其他9%。与1992年解析结果比较发现：从1992年到2002年重庆市主城区大气TSP来源发生了转变，从煤烟尘和钢铁尘为主的污染逐渐变成以建筑尘、扬尘、煤烟尘和机动车尘混合型的污染。

Sources Apportionment of TSP in Chongqing

Aerosol samples for total suspended particles (TSP) at seven sites and seven kinds of aerosol source samples were collected from 2001 to 2002 in Chongqing. The concentrations of elements, organic carbon, element carbon, water-solubility ions of all particle samples were obtained by chemical analysis method. Source apportionment results derived from the chemical mass balance (CMB) indicated that the major contributors of TSP in Chongqing included: soil/road side dusts (30%), construction dusts (25%), soot dusts (18%), vehicle dusts (10%) and metallurgy dusts (8%), respectively. Moreover, comparison with the results of source apportionment in 1992 in Chongqing showed that major sources of TSP had changed from soot and metallurgy sources in 1992 to multi-pollution sources in 2002.