【摘要】 利用电感耦合等离子体质谱仪（ICP-MS）测定了郴州市PM_2.5中无机元素的质量浓度,并通过元素的富集特征和主成分解析了它们的来源.结果表明,研究区域在春、夏、秋、冬四个季节PM_2.5平均质量浓度分别为28.7、30.7、41.4和58.1μg·m^-3,无机元素的平均占比为15.63%,其中Al、Fe、Zn、Cu、Pb、Cr、Mn、As、Si和Ti占无机元素总量的90.6%.富集因子分析结果表明,Cd、Ag、Bi、Sb、As、Cu、Pb、Zn、Cr、Ni和V主要来自于人为污染,特别是有色金属元素的富集程度较高,这与郴州市是著名的有色金属之乡,有色金属开采及冶炼发达是相关的.主成分分析结果说明郴州市PM_2.5中无机元素主要来源于煤和石油的燃烧、汽车尾气排放、有色金属的冶炼以及土壤扬尘.更多还原

【Abstract】 In this study, the mass concentrations of inorganic elements in PM_2.5 of Chenzhou city were determined by using inductively coupled plasma mass spectrometry（ICP-MS）,and their sources were analyzed by the enrichment factor and principal component analysis. The results showed that the average mass concentration of PM_2.5 in the study area were 28.7 μg·m^-3,30.7 μg·m^-3,41.4 μg·m^-3 and 58.1 μg·m^-3 in the spring, summer, autumn and winter, respectively. The average proportion of inorganic elements was 15.63% of PM_2.5,of which Al,Fe,Zn,Cu,Pb,Cr,Mn,As,Si and Ti accounted for 90.6% of the total amount of inorganic elements. The enrichment factor analysis showed that Cd,Ag,Bi,Sb,As,Cu,Pb,Zn,Cr,Ni and V were mainly originated from anthropogenic factor. Particularly,the enrichment degree of non-ferrous metals was higher, which was related to the fact that Chenzhou is a famous town of non-ferrous metals, and the exploitation and smelting of non-ferrous metals are well developed. Principal component analysis showed that the inorganic elements in PM_2.5 of Chenzhou city were mainly derived from the combustion of coal and petroleum, automobile exhaust emissions, smelting of non-ferrous metals and soil dust.更多还原