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Research on Polluting Characteristic of Water-soluble Ions in Aerosol in Lanzhou City

Author: LiLiPing
Tutor: ZhouWei
School: Northwest Normal University
Course: Environmental Science
Keywords: Atmospheric aerosols Lanzhou Ion Chromatography Water-soluble ions Fireworks
CLC: X513
Type: Master's thesis
Year: 2008
Downloads: 41
Quote: 2
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Abstract


Atmospheric aerosols have an important impact on human health, the environment and climate, atmospheric pollutants, water-soluble ionic components in aerosol SO 4 2 - , NO 3 - , Cl - , NH 4 , K source apportionment of atmospheric particulate matter, the of Na Ca 2 , Mg 2 and other air particles account for a large proportion of the main chemical components of concern . Contribute to a comprehensive understanding of the atmospheric environment quality status, through the study of the water-soluble inorganic ions in aerosol and the clear aerosol sources, formation mechanisms and transmission significance. In this study, the use of ion chromatography, chemical analysis, mathematical statistics methods such as aerosol samples collected in the winter of 2007 in Lanzhou and environmental quality background point eight kinds of water-soluble inorganic anions and six water-soluble inorganic cation conducted a comprehensive analysis and research (including during the Spring Festival), also conducted a comprehensive study of the the Lanzhou City 2005-2006 full year PM 10 pollution characteristics. The results show that: in the the Lanzhou urban and environmental quality background point synchronous acquisition aerosol PM , 10 enrichment inorganic ion concentration than TSP higher by 7.59% to 15.3%, indicating that the water-soluble ions easier enriched in fine particles. Urban aerosol mass concentration and water-soluble concentrations generally the background points higher than the quality of the environment, urban and environmental quality background point of water-soluble ions Sort different. During the Spring Festival, a large number of discharge of fireworks will make air pollution increase, part of the water-soluble ion concentration is significantly higher in the discharge period, the largest increase K concentration of aerosol mass concentration was affected by weather conditions and water-soluble ions significantly affected. Water-soluble ions in aerosol samples collected in 2007 and 1990 at the same location, the same season 17 years apart, Lanzhou City, due to changes in the structure of industry and energy, the major water-soluble ions in aerosol composition ratio and sorting obvious change is happening. Statistical method of correlation analysis between the water-soluble ions of atmospheric aerosols and atmospheric pollutants, can initially be inferred between Lanzhou City aerosol water-soluble inorganic anions and cations likely to the NH 4 NO 3 , (NH 4 ) 2 SO 4 , MgSO 4 The, NH 4 Cl and other forms of existence.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Atmospheric pollution and its control > Particulate pollutants
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