Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/59390
Type: Artigo de periódico
Title: PGEs and other traffic-related elements in roadside soils from Sao Paulo, Brazil
Author: Morcelli, CPR
Figueiredo, AMG
Sarkis, JES
Enzweiler, J
Kakazu, M
Sigolo, JB
Abstract: The distribution of platinum, palladium, and rhodium in soils adjacent to a major road in Sao Paulo, Brazil, is presented. Sampling was made at four sites with varying traffic volumes and driving styles (stop/start vs. constant speed). High-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) with NiS fire assay collection and Te coprecipitation was used as analytical procedure. The platinum group element (PGE) pattern distribution in the analyzed roadside soil was similar to that of other traffic-related elements such as Zn and Cu, characterized by a strong decrease of the PGE content with increasing distance from the traffic lane. The results indicate that the PGE concentrations in roadside soil are directly influenced by traffic conditions and distance, which characterize their catalytic converter origin. Pt, Pd, and Rh contents range between 0.3 and 17 ng g(-1), 1.1 and 58 ng g(-1), and 0.07 and 8.2 ng g(-1) respectively. Lower levels of Pt and lower Pt/Pd ratios in relation to similar studies in other countries were observed due to the different Pt/Pd ratios in Brazilian automobile catalytic converters. This is the first study to assess traffic-derived Pt, Pd, and Rh deposition in Brazil. (c) 2004 Elsevier B.V. All rights reserved.
Subject: rhodium
platinum
palladium
catalytic exhausts
urban pollution
traffic-related elements
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.scitotenv.2004.10.018
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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