春季华东高山背景区域PM_(2.5)和PM_(2.5～10)中水溶性无机离子特征  

Characteristics of Water-soluble Inorganic Ions in PM_(2.5) and PM_(2.5-10) in Mountain Background Region of East China in Spring

作　　者：苏彬彬 张智胜[2] 陶俊[2] 许椐洋 纪贤鑫 刘心东 张若宇 

机构地区：[1]福建省国家大气环境背景值武夷山监测站,武夷山354302 [2]环境保护部华南环境科学研究所,广州510655

出　　处：《环境科学》2015年第4期1195-1201,共7页Environmental Science

基　　金：2008年中央财政主要污染物减排专项资金项目;环境保护公益性行业科研专项(200709054)

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）％．SO4^2-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．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 ）2S04 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.

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 

分 类 号：X513[环境科学与工程—环境工程]