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首页> 外文期刊>Environmental Science & Technology >Importance of Automobile Exhaust Catalyst Emissions for the Deposition of Platinum,Palladium,and Rhodium in the Northern Hemisphere
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Importance of Automobile Exhaust Catalyst Emissions for the Deposition of Platinum,Palladium,and Rhodium in the Northern Hemisphere

机译：汽车废气催化剂排放在北半球沉积铂，钯和铑的重要性

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摘要

An estimated 500 million vehicles worldwide are equipped with an exhaust catalyst that uses platinum group elements(PGE)as the main active components and thus contribute to global PGE emissions.Although PGE emitted from automobile exhaust catalysts were first believed to remain in the roadside environment,we propose here that fine PGE-containing particles in automobile exhaust have resulted in a widespread distribution of emitted PGE.Regional and long-range transport of PGE from automobile exhaust catalysts is supported by elevated PGE deposition in both a peat bog located 250 m from traffic and in central Greenland,respectively.Russian smelters were also found to contribute to PGE contamination in central Greenland.Deposition rates estimated for the roadside environment,the peat bog,and central Greenland were used to provide a first estimate of PGE deposition in the northern hemisphere.The results show that deposition of regionally or long-range transported PGE accounts for a large fraction of total PGE deposition,and PGE deposition in the roadside environment represents less than 5% of the total deposition.Transport at the regional and global scales represents an important component in the environmental cycle of emitted PGE and needs to be further studied to fully assess the environmental fate of PGE from automobile exhaust catalysts.
机译：全世界估计有5亿辆汽车配备了以铂族元素（PGE）为主要活性成分的排气催化剂，因此有助于全球PGE排放。尽管人们首先认为，汽车排气催化剂所排放的PGE仍保留在路边环境中，我们在此提出，汽车尾气中含有PGE的细小颗粒导致了广泛分布的PGE。汽车尾气催化剂中PGE的区域和远距离迁移受到距离交通250 m的泥炭沼泽中PGE沉积量增加的支持。俄国冶炼厂也被发现对格陵兰中部的PGE污染有贡献。对路边环境，泥炭沼泽和格陵兰中部的沉积速率进行了估算，以提供对北半球PGE沉积的初步估算。结果表明，区域或远距离运输的PGE沉积占很大比例。 PGE总量的沉积作用，而路边环境中PGE的沉积量不到总沉积量的5％。区域和全球范围的运输是排放PGE的环境周期的重要组成部分，需要进一步研究以全面评估汽车废气催化剂对PGE的环境影响。

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  • 来源
    《Environmental Science & Technology》 |2005年第21期|p.8156-8162|共7页
  • 作者

    SEBASTIEN RAUCH; HAROLD F.HEMOND; CARLO BARBANTE; MASANORI OWARI; GREGORY M.MORRISON;

  • 作者单位

    Water Environment Technology,Chalmers University of Technology,412 96 Goteborg,Sweden,School of Civil and Environmental Engineering,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,Department of Environmental Science,University of;

    Water Environment Technology,Chalmers University of Technology,412 96 Goteborg,Sweden,School of Civil and Environmental Engineering,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,Department of Environmental Science,University of;

    Water Environment Technology,Chalmers University of Technology,412 96 Goteborg,Sweden,School of Civil and Environmental Engineering,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,Department of Environmental Science,University of;

    Water Environment Technology,Chalmers University of Technology,412 96 Goteborg,Sweden,School of Civil and Environmental Engineering,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,Department of Environmental Science,University of;

    Water Environment Technology,Chalmers University of Technology,412 96 Goteborg,Sweden,School of Civil and Environmental Engineering,Massachusetts Institute of Technology,Cambridge,Massachusetts 02139,Department of Environmental Science,University of;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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