摘要
为研究成都市春节期间大气PM2.5化学元素特征,于2010年2月10-28日在中国气象局成都高原气象研究所办公楼顶进行大气PM2.5采样。采用X-射线荧光光谱法（XRF）分析PM2.5中的无机元素。结果表明,除夕、元宵节PM2.5日均质量浓度分别为137.9μg/m3和287.5μg/m3。S、K、Cl、Al、Ba、Mg、Pb和Cu元素在除夕和元宵节2天中质量浓度是其它采样时间浓度的1.44~14.27倍;富集因子分析表明,S、Cl、K、Zn、As、Br、Sr、Cd、Sn、Ba、Pb、Cu主要是人类活动引起的各种污染所致;主成分分析得出,春节期间成都市PM2.5中的元素主要来源于烟花排放、机动车和燃煤排放;其次为冶金及机械制造等排放的烟尘。
Ambient PM2.5 samples were collected during Spring Festival at a site in Chengdu to investigate characteristics of firework displays.Concentrations of 23 elements were determined by X-ray fluorescence.Results indicated that PM2.5 mass concentrations during the New Year＇s Eve and Lantern Festival were 137.9 μg/m3 and 287.5 μg/m3 respectively,concentrations of S,K,Cl,Al,Ba,Mg,Pb and Cu in the New Year＇s Eve and Lantern Festival were 1.44~14.27 times higher than other sampling time.Enrichment factor analysis showed that S,Cl,K,Zn,As,Br,Sr,Cd,Sn,Ba,Pb,Cu were mainly caused by human activities.Principal component analysis demonstrated that main sources of elements during Spring Festival were fireworks discharge,motor vehicle emission and coal-fired emission,followed by metallurgical and machinery manufacturing emission.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第5期151-155,170,共6页
Environmental Science & Technology
基金
四川省气象局重点科研和应用开发项目(2010-青年-10
2007-4)
公益性行业科研专项(GYHY201206041)
中国气象局成都高原气象研究所科研费专项经费项目(BROP201018
BROP201014
BROP201121
BROP200806)
关键词
PM2
5
元素
富集因子
主成分分析
PM2.5
element
enrichment factor
principal component analysis
