Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2011, Vol. 22 ›› Issue (4): 205-211 doi: 10.13538/j.1001-8042/nst.22.205-211

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

JIN Chan1,2,FAN Xiaoyan1 LI Yan2 LIANG Feng2 LI Yulan2 ZOU Yang2 YANG Yongji1 XIE Yaning3   

  1. 1Department of Biophysics,College of Basic Medical Sciences,Second Military Medical University,Shanghai 200433,China 2Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China 3Institute of High Energy Physics,the Chinese Academy of Sciences,Beijing 100039,China
JIN Chan, FAN Xiaoyan, LI Yan, LIANG Feng, LI Yulan, ZOU Yang, YANG Yongji, XIE Yaning . Multi-technique characterizations of main elements in the vehicle exhaust particles collected in a tunnel in Shnaghai.Nuclear Science and Techniques, 2011, 22(4): 205-211     doi: 10.13538/j.1001-8042/nst.22.205-211

Abstract:

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.

Key words: Vehicle exhaust particles, Main elements, XAFS, ICP-MS, Mssbauer spectrum, Plasmid DNA assay