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| 都匀PM10中水溶性无机离子分布特征与来源分析 |
| Distribution Characteristics and Sources Analysis of Water soluble Inorganic Ions in PM10 in Duyun City |
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| DOI： |
| 中文关键词: PM10 水溶性无机离子 来源解析 都匀 |
| 英文关键词: PM10 Water soluble inorganic ions Source identification Duyun |
| 基金项目:国家自然科学基金资助项目(41265008)； 贵州省环境保护厅环境科技基金资助项目(黔环科［2011］6号) |
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| 中文摘要: |
| 2013年4月—2014年1月，按季节在都匀劳动局楼顶采集PM10样品，对样品中的水溶性无机离子的特征和来源进行分析。结果表明，PM10中总水溶性无机离子年平均质量浓度为53.76 μg/m3，其中SO2-4、NO-3、NH+ 4为主要离子，年平均质量浓度分别为34.69 μg/m3、7.15 μg/m3和6.60 μg/m3； PM10中水溶性无机离子总质量浓度呈现出春季最高，冬秋季次之，夏季最低的特征，主要离子也呈现出相似的分布规律； 离子平衡表明，4个季节PM10均显弱酸性，CE/AE年均值为0.73； NO-3/SO2-4年均值低于0.3，表明采样期间PM10污染主要来自固定源； 主成分分析结果表明，二次污染、扬尘、工业活动排放以及生物质燃烧等是PM10的主要污染来源。 |
| 英文摘要: |
| PM10 samples were collected seasonally from April 2013 to January 2014 at the top of Labor Bureau building in Duyun. The distribution characteristics and sources of water soluble inorganic ions of PM10 were analyzed. The results showed that the annual average concentration of total water soluble ions was 53.76 μg/m3 ,SO2-4,NO-3 and NH+4 were the major ions in PM10 and theaverage concentrations were 34.69 μg/m3,7.15 μg/m3and 6.60 μg/m3,respectively. For seasonal variations,the total concentrations of water soluble inorganic ions ranked as spring＞fall and winter＞summer,and the same trend with the major ions. The results from ion balance calculation analysis suggested that PM10 samples of four seasons were weakly acidic and the annual average of ∑anion/∑cation(CE/AE) was 0.73. The annual average of NO-3/SO2-4in PM10 samples was lower than 0.3,reflecting that the stable sources (such as coal combustion) was a major source of atmospheric pollutants. Principal component analysis indicated that the multiple sources contributing to PM10 pollution in Duyun were secondary particles,soil dusts,industrial sources and biomass burning. |
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