Temporal and spatial studies of autocatalyst-derived platinum, rhodium. and palladium and selected vehicle derived trace elements in the environment

被引:176
作者
Jarvis, KE
Parry, SJ
Piper, JM
机构
[1] Kingston Univ, CEESR, NERC ICP MS Facil, Kingston upon Thames KT1 2EE, Surrey, England
[2] Univ London Imperial Coll Sci Technol & Med, TH Huxley Sch Environm Earth Sci & Engn, Ascot SL5 7PY, Berks, England
关键词
D O I
10.1021/es0001512
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The distribution of platinum; rhodium, and palladium (platinum-group elements; PGEs) adjacent to two major U.K. roads shows a rapid decrease (more than 1 order of magnitude) away from the road and reflects patterns shown by other traffic-derived trace elements such as Ph and Zn. However, ratios of Pt:Rh remain relatively constant from Oto 10 m distance, suggesting that at least some of the PGEs are transported away from the source. A temporal study over a 12-month period, of;road dust and surface samples, reveals elevated concentrations above background levels, with maximum values of Pt >500 ng g(-1), Rh 70 ng g(-1), and Pd 70 ng g(-1). Concentrations vary considerably throughout the year and show some tentative correlation with rainfall. Element speciation, an essential control on mobility and hence distribution, was investigated, and the results of solubility experiments show that up to 30% of the Pd present dissolves in acid solutions. This indicates that at east some of the Ed is present in a soluble-term and is therefore potentially highly mobile.
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页码:1031 / 1036
页数:6
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