生态环境学报2016，Vol.25Issue(7)：1181-1187,7.DOI:10.16258/j.cnki.1674-5906.2016.07.013
北京市春季PM2.5中金属元素污染特征及来源分析
Pollution Characteristics and Source Analysis of Metal Elements in PM2.5 during Spring in Beijing
摘要
Abstract
PM2.5 is the primary pollutant in atmospheric environment of most cities in China. Metal elements, especially heavy metals, in PM2.5 can harm ecological environment and human health. In order to study characteristics of metal elements and their sources in spring atmospheric PM2.5, 13 PM2.5samples were collected in Beijing City and suburban in May 2015. Then, 15 metal elements' concentrations were measured by Elan DRC II type inductively coupled plasma mass (ICP-MS). The results show that concentrations of Na and Ca were the highest, accounting for 72.23% of those of total elements (in urban area) and 71.96% (in suburb); concentrations of Mg, Al, Fe, K were the second highest, accounting for 25.84% of those of total elements (in urban area) and 26.35% (in suburb). Most elements' concentrations in Beijing city decreased compared to suburban, while concentrations of three heavy metals (Zn, Ni, Cu) in urban area were significantly higher than those in suburb. Most concentrations of elementsin Beijing city during the day decreased compared to those at night, however, concentrations of Ba, Fe and Pb during the day were slightly higher than those at night. Enrichment factor analysis showed that Ba, Mn, Fe, Al, K, Cr (EF values 1~10) were lightly enriched; Mg, Ca, Na, Cu, Pb (EF values 10~100) were moderately enriched; Mo ( EF more than 1000) was highly enriched. Sources analysis of metal elements in PM2.5 were conducted through a multi-method analysis, including Pearson correlation analysis, factor analysis and pollution emission source-marked elements analysis. The results indicate that sources of spring PM2.5 in Beijing were mainly composed of the earth's crust sources (including soil dust and construction dust), metallurgical industries and vehicle emissions.关键词
细颗粒物/金属元素/富集因子分析/Pearson相关分析/因子分析Key words
PM2.5/metal elements/enrichment factor analysis/pearson correlation analysis/factor analysis分类
资源环境引用本文复制引用
熊秋林,赵文吉,王皓飞,赵佳茵,汪涵涵,孙春媛,张骞中..北京市春季PM2.5中金属元素污染特征及来源分析[J].生态环境学报,2016,25(7):1181-1187,7.基金项目
国家教育部博士点基金项目（20111102110004）；国家青年科学基金项目（41101404）；北京市教委科技计划项目（KM201110028013）；北京市教委学科建设与研究生教育建设项目 （）
