中国西部背景地区PM_(2.5)化学组分特征及其对大气散射系数的影响  

Characterization of chemical compositions of PM_(2.5) and its impact on scattering coefficients at a background site over Western China

作　　者：杨毅红[1,2] 陶俊[2] 朱李华[2] 张智胜[2] 王启元[3] 曹军骥[3] 

机构地区：[1]电子科技大学中山学院材料与食品学院,中山528402 [2]环境保护部华南环境科学研究所,广州510655 [3]中国科学院地球环境研究所,西安710075

出　　处：《环境科学学报》2017年第4期1216-1226,共11页Acta Scientiae Circumstantiae

基　　金：国家环境保护公益性行业科研专项(No.200809143;201409009)~~

摘　　要：于2009年春、夏和秋季在全球大气本底基准监测站青海瓦里关同步观测了PM_(2.5)中主要化学成分和大气散射系数(bsp).结果显示,观测期间瓦里关PM_(2.5)浓度年均值为(12.6±12.0)μg·m^(-3),显著低于国家年均值标准.总水溶性无机离子和碳气溶胶浓度分别为(1.7±1.6)μg·m^(-3)和(3.2±1.0)μg·m^(-3),分别占PM_(2.5)浓度的16.5%和25.4%.基于IMPROVE经验公式,瓦里关bsp最主要的贡献因子是有机物(OM)和土壤尘(FS),贡献率分别达到48%和28%,其它组分对bsp的贡献率均小于10%.PM_（2.5） samples were collected at Mt. Waliguan（ WMO/GAW） during spring,summer and autumn in 2009. The major chemical components of PM_（2.5）and scattering coefficients were measured simultaneously. The results show that the annual concentration of PM_（2.5）at Mt. Waliguan is（ 12.6±12.0）μg·m（-3）,significantly lower than the national ambient air quality standards. The concentrations of total water-soluble inorganic ions and carbonaceous aerosols are（ 1.7±1. 6） μg·m（-3）and（ 3. 2 ± 1. 0） μg·m（-3）,accounting for 16.5% and 25.4% of PM_（2.5）,respectively. Based on IMPROVE empirical formula,the major contribution factors to bspare OM（ organic matter） and FS（ fine soil）,accounting for 48% and 28% of total scattering,respectively.Contributions of the other factors are all lower than 10%.

关 键 词：瓦里关 PM2.5 化学组分 大气散射系数 

分 类 号：X513[环境科学与工程—环境工程]