| 贡嘎山大气气溶胶中水溶性无机离子的观测与分析研究 |
| 摘要点击 3972 全文点击 2264 投稿时间：2008-01-09 修订日期：2008-03-15 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 气溶胶 水溶性 离子 PM2.5 PM10 |
| 英文关键词 aerosol water-soluble ion PM2.5 PM10 |
|
| 中文摘要 |
| 2005年12月～2006年11月在贡嘎山东坡海拔1 640 m处,利用大流量滤膜采样器对大气中的气溶胶粒子进行了分级采样,并用离子色谱(IC)分析了气溶胶中水溶性无机成分的含量.结果表明,PM2.5和PM10中总水溶性无机离子年平均浓度分别为6.46和8.86 μg/m3,其中主要的3种离子SO2-4、NO-3和NH+4,占PM2.5和PM10中总水溶性无机离子浓度的82%和85%.Na+、 NH+4、 K+、Cl-和SO2-4主要分布在细粒子中,NO-3、Mg2+和Ca2+在粗细粒子中各占一半.雨季Na+与Cl-相关性明显增强,PM2.5和PM10中Na+与Cl-的相关系数R2分别为0.87和0.84. PM10中SO2-4与NH+4的量浓度比值接近1∶2,表明SO2-4与NH+4主要以(NH4)2SO4形式存在. |
| 英文摘要 |
| Samples of aerosol are sampled by high volume sampler from Dec.2005 to Nov. 2006 at high altitude of 1 640 m of Gongga Mountain. Water-soluble ions in PM2.5 and PM10 are analyzed by ion chromatogram(IC). The results shows that the annual concentrations of total water-soluble inorganic ions are respectively 6.46 and 8.86μg/m3 in PM2.5 and PM10, three major ions of SO2-4, NO-3 and NH+4, account for respectively 82% and 85% in PM2.5 and PM10. Na+, NH+4, K+, Cl- and SO2-4were mostly distributed in fine particles, NO-3, Mg2+ and Ca2+ occupied each one half in coast of crude and fine particles. The correlation of Na+and Cl- is significantly enhanced in wet season in Gongga Mountain, the correlation coefficient R2 are respectively 0.87 and 0.84 in PM2.5 and PM10. The concentration ratio of SO2-4and NH+4is approximate to 1∶2 in PM10, main existence form of SO2-4and NH+4is （NH4）2SO4at Gongga Mountain. |
|
|
|
