西安市大气总悬浮颗粒物及金属元素污染研究

根据西安市城市功能分区选择 4个点采集大气样品 ,测定总悬浮颗粒物 (TSP)及其中Pb、Mn、Ni、Cr、Cd五种金属元素的浓度。结果表明 ,西安市大气 TSP采暖期浓度显著高于非采暖期 (P <0 .0 5)。草滩大气 TSP浓度在采暖期和非采暖期显著低于开关厂、纺织城、市监测站 (P <0 .0 5)。5种金属元素浓度由高到低依次为 Pb、Mn、Cr、Ni、Cd,其中 Cr、Ni、Cd的浓度采暖期比非采暖期显著升高 (P <0 .0 5)。提示西安市大气 TSP污染是一个严重、亟待解决的问题 ,其中燃煤是造成大气污染的重要原因之一

Research on total suspended particles and metals pollution in Xian

Four total suspended particles samples were collected at different functional regions of Xi′an ,and the concentration of total suspended particles and five metals, including lead, manganese, chromium, nickel and cadmium were determined.The results showed that the concentation of total suspended particles of winter samples were higher than that of summer samples statisticaly (P<0.05).The concentration of TSP of Caotan were lower than that of switchgear plant, textile city,environmental monitoring station in winter and summer (P<0.05).The order of the concentration of five metals from high to low is Pb,Mn,Cr,Ni and Cd.Meanwhile the concentration of Cr,Ni and Cd of winter samples were higher than that of summer samples statiticaly (P<0.05).It was found that total suspended particles pollution is one of emergent,serious tasks in Xi′an now and burning coal is one of the most important of reasons which lead up to pollution.