| 春季华东高山背景区域PM2.5和PM2.5~10中水溶性无机离子特征 |
| 摘要点击 3457 全文点击 1585 投稿时间：2014-10-09 修订日期：2014-11-30 |
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| 中文关键词 高山背景站 细颗粒物 粗颗粒物 水溶性无机离子 气体污染物 区域输送 |
| 英文关键词 high mountain background site fine particle coarse particle water-soluble inorganic ions gaseous pollutant regional transportation |
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| 中文摘要 |
| 为了探讨华东高山背景区域春季颗粒物中水溶性组分的特征,2014年3月至5月在国家大气背景监测福建武夷山站采集PM2.5及PM2.5~10样品,获取了水溶性无机离子组分,并同步收集气象因子及SO2、NO2、O3、PM10和PM2.5等污染物质量浓度数据. 结果表明,春季武夷山背景点PM2.5和PM2.5~10中水溶性无机离子总浓度分别为(8.3±2.8)μg ·m-3和(1.3±0.9)μg ·m-3,分别占PM2.5和PM2.5~10质量浓度的(43.7±7.5)% 和(24.4±6.4)%. SO42-占PM2.5质量浓度百分比最高,为(32.4±6.3)%; NO3-占PM2.5~10质量浓度百分比最高,为(8.9±3.7)%. 春季武夷山背景点硫酸盐主要存在于细颗粒物中,且以(NH4)2SO4和K2SO4的形式存在,粗颗粒中的硝酸盐则主要以Mg(NO3)2的形式存在. 春季武夷山背景点水溶性无机离子主要来源于沙尘、海盐及高污染区域的远距离输送. |
| 英文摘要 |
| PM2.5 and PM2.5-10samples were collected during March to May of 2014 at the National atmospheric background monitoring station (Wuyishan station) in Fujian Province. Water-soluble inorganic ions in PM2.5 and PM2.5-10were determined. Meteorological parameters and air pollutants including SO2, NO2, O3, PM10 and PM2.5 were also recorded. The results showed the total water-soluble inorganic ions concentrations were (8.3±2.8) μg ·m-3 and (1.3±0.9) μg ·m-3, which accounted for (43.7±7.5)% and (24.4±6.4)% of the PM2.5 and PM2.5-10 mass, respectively. Sulfate and nitrate were the dominant ions in PM2.5 and PM2.5-10, respectively, which accounted for (32.4±6.3)% and (8.9±3.7)% of them, respectively. Sulfate mainly existed in fine particle in the forms of (NH4)2SO4 and K2SO4, while nitrate mainly existed in coarse particle in the form of Mg(NO3)2. The water-soluble inorganic ions at the Wuyishan background monitoring station in spring mainly came from long-distance transportation of dust, sea salt and pollutant of heavy polluted regions. |
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