Multi-technique characterizations of main elements in the vehicle exhaust particles collected in a tunnel in Shnaghai  

作　　者：JIN Chan FAN Xiaoyan LI Yan LIANG Feng LI Yulan ZOU Yang YANG Yongji XIE Yaning 

机构地区：[1]Department of Biophysics, College of Basic Medical Sciences, Second Military Medical University, Shanghai 200433, China [2]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China [3]Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100039, China

出　　处：《Nuclear Science and Techniques》2011年第4期205-211,共7页核技术（英文）

基　　金：supported by Knowledge Innovation Project of Chinese Academy of Sciences (KJCX3.SYW.N3,key program);the National Natural Science Foundation of China (10490182,key program and 10675159)

摘　　要：In this study,vehicle exhaust particles were collected three locations (the middle,entrance and outside) of the Dapu Road tunnel in downtown Shanghai,and the particle samples were characterized using SEM,XAFS,ICP-MS and M?ssbauer spectrometry,and the oxidative damage was assessed by plasmid DNA.Most iron-containing particles are found from vehicle exhaust,and iron oxide is the major species in all samples.Its concentration in the particles inside the tunnel is higher than that the outside particles.The iron particles inside the tunnel have higher proportion of water-soluble fraction in hydrous iron sulfate form or smaller size.ZnCl2 is the main soluble fraction in zinc-containing particles,while higher percentage of insoluble fraction existed in the particles outside of tunnel.Major species of lead-containing particles are PbSO4,Pb3(PO4)2 and PbCO3.In addition,the soluble fraction of other transition metallic elements as Ti and V is higher in the particles inside the tunnel than that outside the tunnel.The plasmid DNA assay results indicate that the particles from vehicle exhaust have a stronger oxidative damage and inflammation than that from outside of the tunnel.In this study, vehicle exhaust particles were collected three locations （the middle, entrance and outside） of the Dapu Road tunnel in downtown Shanghai, and the particle samples were characterized using SEM, XAFS, ICPMS and M6ssbauer spectrometry, and the oxidative damage was assessed by plasmid DNA. Most iron-containing particles are found from vehicle exhaust, and iron oxide is the major species in all samples. Its concentration in the particles inside the tunnel is higher than that the outside particles. The iron particles inside the tunnel have higher proportion of water-soluble fraction in hydrous iron sulfate form or smaller size. ZnC12 is the main soluble fraction in zinc-containing particles, while higher percentage of insoluble fraction existed in the particles outside of tunnel. Major species of lead-containing particles are PbSO4, Pb3（PO4）2 and PbCO3. In addition, the soluble fraction of other transition metallic elements as Ti and V is higher in the particles inside the tunnel than that outside the tunnel. The plasmid DNA assay results indicate that the particles from vehicle exhaust have a stronger oxidative damage and inflammation than that from outside of the tunnel

关 键 词：打浦路隧道 颗粒浓度 汽车尾气 收集技术 质粒DNA 水合硫酸铁 刻划 XAFS方法 

分 类 号：X701[环境科学与工程—环境工程] U459.2[建筑科学—桥梁与隧道工程]