Concentrations And Elemental Components Of TSP, PM₁₀, PM_2.5 In Ambient In Zhengzhou

This article mainly studies the pollution condition of atmospheric particulate matter in Zhengzhou nowadays. To set the sampling point in the leading wind direction and collect samples TSP,PM10,PM2.5 three different diameters of atmospheric particles in winter and sμmmer two seasons, and evaluate the pollution condition of them. What's more, to stμdy and evaluate the content of the 10 kinds heavy metals, the four water-soluble anions in these three different size particles. The research includes the following:1. In the northwest-southeast diagonal of Zhengzhou city to set four sampling points which is Zhengzhou Mniversity New Campus, Zhengzhou Mniversity South Campμs, Henan Environmental Monitoring Center, Henan Disease Controlling Center collect the TSP,PM10,PM2.5 particles in winter and sμmmer. People can calculate the concentrations and evaluate the pollμtion condition respectively, then can get TSP, PM10 of the sμmmer in Zhengzhou, the daily average concentration 289.5μg/m3,261.2μg/m3. TSP is GradeⅢof the national standard for ambient air qμality standard. The value PM10 has been more than GradeⅢ. The winter are 400.0μg/m3,343.2μg/m3,263.5μg/m3 respectively which were all exceeded GradeⅢ. PM2.5 value average daily concentration in winter and summer were 183.3μg/m3,263.5μg/m3 respectively which has exceed the Mnited States issμed standard value. This shows that the pollution of TSP, PM10,PM2.5 atmospheric particles in ZhengzhouCity are more serious.2. The ion chromatography analysis of the water-soluble inorganic ions F-, Cl-, NO3- and SO42-by ultra-pure water ultrasonic extraction TSP, PM10,PM2.5 shows that: the turns of content of water- soluble inorganic ions in order from low to high is F-,Cl-,NO3- and SO42-. To deal the ten kinds heavy mental Pb,Cr,Mn,Ni,V,Cd,Cu,Se,Co,Be in TSP,PM10,PM2.5, before nitric acid-hydrogen peroxide microwave digestion, the inductance coupled plasma mass spectrometry (ICP-MS) analysis shows: the heavy metal content in winter is higher than in summer.3. For the inorganic elements contents in atmospheric particles TSP, PM10,PM2.5,is valμated pollμtion by enrichment factors. The valuated result is as follows:the most serious enrichment is Cd, following is Pb. Be is with no enrichment. Cr, Mn, Ni, Co, are 2 class enrichment and belong to middle pollution. The Cu is heavy pollution,3 class enrichment.