郴州市大气PM2.5中无机元素污染特征及来源分析  

Characteristics and Sources of Inorganic Elements in Atmospheric PM2.5 at Chenzhou City

作　　者：杨麒[1] 傅致严 刘湛[2] 罗达通 李晶 陈翀宇 李小明[1] 曾光明[1] YANG Qi;FU Zhiyan;LIU Zhan;LUO Datong;LI Jing;CHEN Chongyu;LI Xiaoming;ZENG Guangming(College of Environmental Science and Engineering,Hunan University,Changsha 410082,China;Hunan Provincial Academy of Environmental Protection Sciences,Changsha 410004,China)

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082 [2]湖南省环境保护科学研究院,湖南长沙410004

出　　处：《湖南大学学报（自然科学版）》2019年第6期133-140,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51779088);国家环境保护公益性行业科研专项资助项目(20150919)~~

摘　　要：利用电感耦合等离子体质谱仪(ICP-MS)测定了郴州市PM2.5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PM2.5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PM2.5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.In this study,the mass concentrations of inorganic elements in PM2.5 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 PM2.5 in the study area were 28.7μg·m-3,30.7μg·m-3,41.4μg·m-3 and 58.1μg·m-3 in the spring,summer,autumn and winter,respectively.The average proportion of inorganic elements was 15.63%of PM2.5,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 PM2.5 of Chenzhou city were mainly derived from the combustion of coal and petroleum,automobile exhaust emissions,smelting of non-ferrous metals and soil dust.

关 键 词：PM2.5 无机元素 富集因子 主成分分析 郴州 

分 类 号：X513[环境科学与工程—环境工程]