Analysis On Chemical Species And Pollution Charaeteristie Of Atmospheric Heavy-metals In Nanchang

Atmospheric particulate pollution is the primary problem of air quality in China, The research of heavy metals of contemporary atmosphere of atmospheric chemistry, is a hot spot in environmental science research, Also it is the main factors that causes the environmental changes in atmospheric particulate. The danger of largely heavy metal elements in the environmental depends on the existing form of the heavy metal element. The existing form of the heavy metal element is influenced by particle size, heavy metal form spacetime, The characters of pollution is more complicated. So the study of atmospheric particulates is very important for improveing atmospheric air quality standards of the heavy metal form, and provide the scientific basis for disaster evaluation for atmospheric environmental in the urban atmospheric environmental, and it has larger significance evaluation.This study is made in NanChang city (sixth floor of poyang lake research center) and suburbs(sixth floor of environment floor of beforelake campus of NanChangUuniversity), and collected them as atmospheric particulates sample in the two monitoring, Total suspended particles in the atmosphere (TSP) and PM10 which were taken as the research object, And systematically studied atmospheric particulate pollution characteristics and the formation distribution of heavy metals in the two points, And considering the previous research achievements of the researchers for heavy metal, using the biological effectiveness of heavy metals to study the various periods of validity.Firstly, using weight loss method to membrane analysis, and showed that at different times in different places, heavy metal content of particulate matter in the relatively is large difference in urban and suburban in the summer of PM10 and TSP, The overall daily average concentration of PM10 is 132.29μg/m3 in Nanchang City, and the rang of concentrations is from 98.10-165.78μg/m3; The daily average concentration of total is 132.29μg/m3 in TSP, The rang of concentrations ing is from 118.86-581.39μg/m3; The overall daily average concentration of PM10 is 145.17μg/m3 in Nanchang City in winter, and the rang of concentrations is from 101.34-228.75μg/m3; The daily average concentration of total is 357.48μg/m3 in TSP, The rang of concentrations is from 136.74-615.60μg/m3; On this basis, with the enrichment Factor Analysis method to analyze the situation of different sources of heavy metals.The results show that the Ca, Pb, Zn, Cu majority of elements is from anthropogenic sources in Nanchang City; Mg, Mn elements is from both natural and man; The Ca, Pb, Zn, Cu elements of outskirts of the results is most from the man-made sources, the Mn in TSP is e from the natural, The Mg of PM10 is mainly derived from natural sources, and TSP in the sources of Mg element in both natural and man sources.Then, using five-step sequential extraction method to extract the water soluble, acid extractable, reducible, oxidisable and residual various forms with useing ICP-AES method, In this paper, the different morphology of particles were analyzed, and analyzes the morphological analysis of different proportion of heavy metal, and overall salaried produce this kind of reason are illustrated.Finally,using the bioavailability of heavy metals to analysis the effectiveness of various factors. Due to the biological validity coefficients,, activity of heavy metals is stronger, on the contrary, the metal is relatively stable. The results showed that the bioavailability coefficient of the urban areas is bigger than rural areas, which meant that after the release of heavy metals in the urban area is easy to change in the air.