摘要
2013年9月20—28日,通过采集成都市城区道路大气环境中的PM2.5样品,分析测定了其中可溶性无机离子、碳组分和金属元素含量。结果表明,PM2.5中Fe、Mn、Ti、Si、Al等主要来源于机动车行驶产生的道路扬尘,Pb、Cu、Ni和Zn等主要来源于机动车尾气及零部件磨损;PM2.5中水溶性无机离子占道路大气环境细颗粒物的33.7%,A/C比值为0.95,表明细颗粒物偏弱碱性;机动车尾气排放的OC1、OC2、OC4和EC1等4种碳组分占道路大气环境细颗粒物碳组分的65.8%,且OC/EC比值为2.9,有二次有机碳(SOC)产生。
The concentrations of water solvent ions,carbonaceous species and metal elements were measured with PM2. 5samples collected every day in urban road atmospheric environment in Chengdu during September20—28,2013. The results reveal that the element of Fe,Mn,Ti,Si and Al mainly come from fugitive dust of the road produced by motor vehicles,the element of Pb,Cu,Ni and Zn come from emissions of vehicles and wear and tear of component; water soluble inorganic ions account for 33. 7% of PM2. 5,and the A/C ratio is0. 95,which indicates that PM2. 5is weak alkaline;OC1,OC2,OC4 and EC1 account for 65. 8% of total carbon,OC/EC ratio is 2. 9,which reflects that secondary organic carbon（ SOC） is formed.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第9期4598-4602,共5页
Chinese Journal of Environmental Engineering
基金
四川省环境保护重大科技专项(2013HBZX02)
四川省教育厅项目(14ZB0170)
关键词
细颗粒物
化学组分
道路大气环境
机动车
成都
PM2.5
chemical composition
urban road atmospheric environment
vehicle
Chengdu
