潞城市大气PM_（10）中化学元素分布特征

利用ICP-AES分析了潞城市采暖期和非采暖期4个不同功能区PM10样品中16种化学元素,对不同元素的时空分布特征进行了研究,并采用富集因子和主成分分析初步研究了潞城市PM10中元素的主要来源。结果表明,潞城市PM10中重金属污染较为严重,且各元素在采暖期的平均浓度均明显高于非采暖期。PM10中Ca、V、Cr、As、Ni、Mn、Cu、Zn、Al和Pb的富集因子EF〉10,主要来源于人为污染;而Na、Mg、Si、Fe和K的EF〈10,除部分来自人为活动外,主要来自土壤风沙等自然来源。主成分分析结果显示,潞城市PM10中元素的主要来源按贡献率大小依次为：煤烟尘和工业粉尘50.39%,自然源34.37%和机动车尾气15.24%。

Element distribution characteristics in PM_（10） from Lucheng,Shanxi

The concentrations of metallic elements in PM10 at four different areas in Lucheng in heating and non-heating seasons were determined with a ICP-AES system,and the temporal and spatial variation features of different elements were discussed.Statistical methods such as principal component analysis and enrichment factor analysis were performed to compare the chemical components and identify possible emission sources at the sampling sites.The results showed that heavy metal concentrations in heating season were significantly higher than in non-heating.High enrichment factor values（EF10） were obtained for Ca,V,Cr,As,Ni,Mn,Cu,Zn,Al and Pb reflecting the importance of anthropogenic inputs.In contrast,the EF values calculated for Na,Mg,Si,Fe,and K were low（EF10） suggesting that they were mainly of natural sources.Moreover,the principal component analysis revealed that the main sources of elements found in the area were coal combustion and industrial dust（50.39%）,soil dust （34.37%）,motor vehicle emission（15.24%）.