Evaluation Of Atmospheric Environmental Quality Of Baoding And Analysis Of As Pollution Characteristics

The air quality of Baoding City was evaluated. Atmospheric particulates was sampled n cultural area in Baoding city and determined by atomic fluorescence spectrometry. The text is divided into four chapters.ChapterⅠ:Literature Review. Analysed each city's air quality, the major urban air pollutants in the atmosphere is atmospheric particles, SO2, NO2.Air quality in many parts of the country maintained at two standards, and air quality is well. Various regions of the characteristics of air pollution study found that many cities are all coal-burning pollution, atmospheric particulate matter pollution as the main factor. Explore the relationship of the atmospheric particles and human health, the results show that atmospheric particulate matter on human health to a certain extent, especially the heavy metal materials which should arouse people's attention.ChapterⅡ:Based on the monitoring results of sulfur dioxide (SO2), nitrogen dioxide (NO2), respirable particulate matter (PM10) in five monitoring sites of Baoding from 2002 to 2007, air quality was calculated by weighted gray correlation analysis model. Change of air quality with the annual, seasonal, and heating period was evaluated respectively. From the model of pollution factors determine the weight of respirable particulate matter (PM10) air quality for the Baoding constraints factor, and nitrogen dioxide (NO2) and gradually increase the weights. Analysis of data based on a preliminary analysis of three kinds of pollutants from the source.ChapterⅢ:Hydride gengration atomic fluorescence spectrometric method was adopted for the determination of As (Ⅲ) and As (Ⅴ) in the atmospheric particles and dustfall. The amount of reducing agent, acid medium and its acidity, carrier gas and shield gas flow rate and observation height of the fluorescence intensity were investigated, and the interference experiment was carried out for concomitant elements. In the best conditions, the detection limit was 0.34μg/L, the recovery range from 95.6% to 103.3%, the relative standard deviation was about 0.8%. This method was featured by easy operation, fast speed and it has been applied to the analysis of arsenic in the dustfall with satisfactory results.Chapter III:Propose to the air quality assessment to join the new evaluation factors was suggested to increase the evaluation comprehensive. The relationship between the different speciations of the arsenic and toxicity should be studied further.