New data on the mobility of Pt emitted from catalytic converters

被引：23

作者：

Fliegel, D ^{[1
]}

Berner, Z ^{[1
]}

Eckhardt, D ^{[1
]}

Stüben, D ^{[1
]}

机构：

[1] Univ Karlsruhe, Inst Mineral & Geochem, Karlsruhe, Germany

来源：

ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2004年 / 379卷 / 01期

关键词：

platinum; sequential extraction; dust deposits; catalytic converters;

D O I：

10.1007/s00216-004-2556-7

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The mobility and speciation of Pt was investigated in dust deposited in highway tunnels and in gully sediments. For this, a sequential extraction technique was used in combination with a microwave digestion procedure, followed by detection of Pt with high resolution ICP-MS. A digestion procedure using HNO3/HCl/H2O2 was developed and its efficiency tested for environmental materials. Total Pt contents ranged from approximately 100 to 300 mug/kg. The high share of chemically mobile Pt in the tunnel dust (up to about 40%) indicates that Pt is predominantly emitted in a mobile form from the converter. The absence of a mobile fraction in the gully sediment is explained by the elution of Pt by run-off. Except for the mobile and easily mobilised fractions none of the other fractions of the sequential extraction contains Pt, neither in the dust samples nor in the gully sediment.

引用

页码：131 / 136

页数：6

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