| At present, the atmospheric particulate matter has been replaced by SO2, NOx has become the most important urban air pollutants. And less than 10 microns particle size of atmospheric particles easily inhaled human body, the health of urban residents has become an important risk factor. According to the World Health Organization statistics, at present there are about 1.6 billion people worldwide live in cities with serious air pollution, the hundreds of thousands of people each year because of air pollution and acute and chronic respiratory diseases. Atmospheric particulate matter in the water-soluble acidic ion due to its water-soluble, more easily enter the body from the respiratory system, soluble in blood, and contaminated water loop is the formation of acid rain, play an important role in the process. Therefore, the study of atmospheric particulate matter in the water-soluble acidic chemical properties of substances in the environment that exists in the atmosphere, migration, proliferation and the elimination of the process, for effective control of acid rain, air pollution control, reduction of atmospheric particulate matter of urban residents and ecosystems for the harm of great importance.This article was from January 2006 to April 2007, Chengdu University of Technology in the TSP samples were collected 40. From January , 2008 until December, 2008, collecting atmospheric particulate matter in different particle size of 135 samples. Atmospheric water vapor samples collected simultaneously 15. In March , 2006 to play in September, 2008, collected 43 precipitation samples. Using the weight of law, such as ion chromatography analysis of the particles were measured by the quality of samples and the samples of F-, Cl-, NO3-and SO42-four acid anion content.The results showed that total suspended particulate matter in TSP, different size particles in the atmosphere, rain water and atmospheric water vapor in the four kinds of water-soluble anion distribution is somewhat similar to that SO42-content of the highest, followed by NO3-, Cl-, F-content at least, that is, anion SO42-primary pollutants. In particulate matter, F-content changed little with the seasons, and Cl-, NO3-and SO42-concentration changes in the seasons obviously, are high in winter, summer, autumn low. Coal-fired capacity for increased winter rainfall reduction, SO42-long stay in the atmosphere, therefore, SO42-in the winter of TSP and atmospheric water vapor content of the high rainfall in the SO42-content is higher than spring and summer; In contrast, summer rainfall increased, the study area the annual rainfall mainly concentrated in August and September, obviously the role of wet deposition, so the minimum content of SO42-.Of atmospheric particulate matter, precipitation and atmospheric water vapor in the four kinds of cluster analysis of anions, obtained in the phase of their relevance, that TSP in the F-, Cl-and NO3-have similar sources. Three sources of water in the atmosphere is similar; and the source of SO42-ion source and the other three greatly different. TSP extracts by ion analysis, calculated the greatest impact on the pH value of SO42-ion is followed by NO3-. Comparison of atmospheric water vapor and precipitation can be seen the concentration of anions, NO3-concentrations in precipitation than in a marked increase in atmospheric water vapor, changes in the four largest anion. This may be the formation of NO3-in precipitation during the wet deposition caused obvious. SO42- in precipitation from the particulate matter and SO2 conversion. Particles of different size in the study of acidic ions, we can see that the vast majority of SO42-and NO3-on the size of 0.65μm-2.1μm. Due to the small particle size, precipitation and more into the human body, its impact. According to the literature study shows that disease and air pollutants into a certain dose - response relationship, select my "Ambient Air Quality Standard" (GB3095-1996) standard as the average annual air pollution levels to human health evaluation of the study area so the health of PM10 risk prediction.Isotope method through the study area to measure the atmospheric particulate matter content of heavy sulfur isotope. 34S‰value will be derived from coal-fired industrial combustion of solid particulate matter compared to the value of 34S‰, we can see the value of the study area 34S‰atmospheric particulate matter less than coal-fired industrial combustion of solid particulate matter.Sulfur isotopic composition indicate a clear difference may be due to dust particles in the region by the gaseous emissions of sulfur dioxide after a greater impact in the particles of sulfur dioxide gas into the high rate of surface; there may be other low-34S‰value adding sulfur source.
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