摘要
2002年12月～2003年10月分别在南京城区和市郊采集大气细颗粒物(PM2.5)样品,用XRF-9800型荧光分析仪分析,得到17种化学元素的含量.结果表明,南京市大气PM2.5中的元素主要可分为地壳元素和污染元素两大类.研究不同元素在PM2.5中的体积分数、质量分数以及富集系数,发现南京市大气PM2.5超标率高达100%,超标倍数为0.62～1.83,其中S、Pb、Zn 3种污染元素在PM2.5中显著富集,尤其以S元素的富集最为明显,其富集系数在市区均值达6059.1,在市郊均值达1120.2,表现出南京市大气污染煤烟型硫氧化物的特征.
The atmospheric fine particle (PM2.5) samples were collected from December 2002 to October 2003 in Nanjing urban and suburban areas respectively. The contents of 17 kinds of chemical elements were obtained with analysis using the XRF-9800 fluorescent analysis instrument. The elements in Nanjing atmospheric PM2.5 might be classified into two great kinds of the types of earth crust and pollution elements mainly. Studies the fractions of volume and mass and enrichment coefficients of different elements in PM2.5 discovered that in Nanjing the superstandard rate of PM2.5 was high, reaching 100%, exceeding the standard 0.62-1.83 times, in which 3 kinds of pollution elements S, Pb and Zn enriched markedly, with S element the most obvious and average enrichment coefficient reaching 6059.1 in the urban area of Nanjing, and 1120.2 in the suburban area, showing that the atmospheric air pollution in Nanjing was characterized by the SOx of coal smoke type.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2005年第2期146-150,共5页
China Environmental Science
基金
南京信息工程大学科研基金资助(QD08)
关键词
南京
PM2.5
含量
富集系数
Nanjing
PM2.5
element content
enrichment coefficient
