| 长白山PM2.5中水溶性离子季节变化特征研究 |
| 摘要点击 3713 全文点击 1319 投稿时间：2013-01-09 修订日期：2013-06-24 |
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| 中文关键词 PM2.5 水溶性 离子 季节变化 长白山 |
| 英文关键词 PM2.5 water-soluble ion seasonal variation Changbai Mountain |
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| 中文摘要 |
| 为了解长白山大气PM2.5中水溶性离子的季节变化特征及其影响因素，于2005年6月~2008年12月，在长白山北坡海拔763 m处利用大流量滤膜采样器采集PM2.5样品，并用离子色谱分析其中的主要水溶性离子成分含量. 结果表明，3种最主要的水溶性离子SO42-、NH4+和NO3-季节变化趋势明显，SO42-夏季浓度最高，秋季浓度最低；NO3-冬季浓度最高，夏季浓度最低；NH4+的季节变化趋势主要受到SO42-和NO3-季节变化趋势的影响. 不同方向后向轨迹所对应的总水溶性离子浓度存在明显差异，浓度排序依次是 NE-3. Ca2+测量值与CO32-计算值存在明显的相关性，春季最好，夏季最差，R分别为0.74和0.30. |
| 英文摘要 |
| To study seasonal variation of water-soluble ions in PM2.5 at Changbai Mountain. PM2.5 was collected with a high-volume sampler from Jun. 2005 to Dec. 2008, and the concentrations of water-soluble ions were analyzed using ion chromatography. The results showed that the three major ions of SO42-, NH4+ and NO3 showed obvious seasonal variation. The mass concentration of SO42- was the highest in summer and lowest in autumn. The mass concentration of NO3- was the highest in winter and lowest in summer. The seasonal variation of NH4+ was influenced by SO42- and NO3-.The total concentrations of water-soluble ions in PM2.5 from different directions were evidently different, following the order of NE-3, respectively. Ca2+ was strongly correlated with CO32-, and the correlation(R) was higher in spring (0.74) than that in summer (0.30). |
