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

Multi-technique characterizations of main elements in the vehicle exhaust particles collected in a tunnel in Shnaghai 1 2 equal corresp first-author Corresponding author. E-mail address: jinchan2010@yahoo.cn Corresponding author. E-mail address: jinchan2010@yahoo.cn jinchan2010@yahoo.cn 1 equal 2 2 2 2 1 3 Department of Biophysics, College of Basic Medical Sciences, Second Military Medical University, Shanghai 200433, China Department of Biophysics, College of Basic Medical Sciences, Second Military Medical University, Shanghai 200433, China Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100039, China Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100039, China 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 Mössbauer 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. ZnCl 2 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 PbSO 4 , Pb 3 (PO 4 ) 2 and PbCO 3 . 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. 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Nucl Instrum Meth B 10.13538/j.1001-8042/nst.22.205-211 2011-03-30 2011-08-20 2021-01-19 2011 Nuclear Science and Techniques 04 22