广州市夏、冬季室内外PM_(2.5)中元素组分的特征与来源  

Characterization and Source of Element Components in Indoor and Outdoor PM_(2.5) During Summer and Winter in Guangzhou City

作　　者：黄虹[1] 李顺诚[2] 曹军骥[3] 邹长伟[4] 陈新庚[5] 范绍佳[5] 

机构地区：[1]华南师范大学化学与环境学院,广州510006 [2]香港理工大学土木及结构工程系 [3]中国科学院地球环境研究所,西安710075 [4]南昌大学环境科学与工程学院,南昌330029 [5]中山大学环境科学与工程学院,广州510275

出　　处：《分析科学学报》2007年第4期383-388,共6页Journal of Analytical Science

基　　金：国家自然科学青年基金项目(NSFC40205018);香港研究资助局角逐拨款资助项目(PolyU5145/03E)

摘　　要：通过采集广州市9个居民住宅室内、外的PM2.5样品,测定分析PM2.5中18个元素组分的质量浓度,分析讨论其污染、分布特征并解析其污染来源。经过比较得知,广州市PM2.5中元素污染较严重;不同类型住宅PM2.5中元素浓度存在空间分布特征;大部分元素浓度具有夏季比冬季低的变化特征;室内与室外元素浓度比值介于0.4974～2.0497之间;元素浓度的室内、室外相关拟合结果说明冬季室内空气受室外空气影响比夏季时情况更明显;基于富集因子分析,Se、As、S、Pb、Br、Zn和Cl元素高度富集;Ni、V、Cu元素中等富集,主要来自人为源,而Cr、Sr、K、Mn、Ca和Ti元素不富集,主要来自自然源。Indoor and outdoor PM2.5 samples in 9 residences of Guangzhou city were collected. Eighteen element components in PM2.5 sampled were determined, pollution level and distribution characterization of elements were analyzed and discussed, and sources of elements were typed. It was found that in Guangzhou, element pollution in PM2.5 was relatively severe; the mass concentrations of elements showed spatial distribution between different type of residences; the mass concentrations of most of the elements were higher in summer than in winter; the ratios of indoor element mass concentration to the outdoor ranged from 0. 4974 to 2. 0497; and that by the relationships between indoor and outdoor element concentrations, indoor air were influenced by outdoor air, and the influence extent in winter was stronger than that in summer. Based on Enrichment Factor analysis, the elements such as Se, As, S, Pb, Br, Zn and C1 were highly enriched, and the elements including Ni, V and Cu were moderately enriched, implying that they mainly originate from anthropogenic sources, while the elements such as Cr, Sr, K, Mn, Ca and Ti were not enriched, and they originate from natural sources.

关 键 词：PM2.5 元素组分 特征 来源 

分 类 号：O657.34[理学—分析化学]