• 责任者：Zhao Zheng (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Qi Liang
• 刊名：Earth and Environment
• 出版年：2011
• 卷期：39(1)
• 关键词：铂族元素 ; platinum group elements ; 环境地球化学 ; environmental geochemistry ; 中国 ; China
• 页码：p.9-18
• 图表：3 illus., 3 tables, 55 refs.
• 分类号：1800
• issnNo：ISSN1672-9250
• isbnNo：CN52-1139/P

The platinum-group elements (PGEs) (mostly,  Pt,  Pd and Rh) have been used as automobile catalytic converters in automobile industry,  the emission of PGEs has led to the concentration of PGE in road dusts and roadside soils in urban areas that are well above natural background levels. Reported in this paper is the evaluation of contamination of all the PGEs and Au recorded in road dusts and roadside soils from the four major cities: Beijing, Shenzhen, Guangzhou and Guiyang in China.  The results show that there are clearly positive correlations between Pt and Pd, Pt and Rh and Pd and Rh for all the samples, indicating that the compositions of automobile catalyst are Pt, Pd and Rh. The concentrations of Ir, Ru and Os in all the samples are higher than the background values of uncontaminated soil. Dust samples with higher Os contents have lower ¹⁸⁷Os/¹⁸⁸Os ratios, suggesting that Ir, Ru and Os come also from automobile catalytic converters, and may be present as impurities of the automobile catalysts.