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| 1 | Magnetic properties and heavy metal contents of automobile emission particulates显示文摘Measurements of the magnetic properties and total contents of Cu, Cd, Pb and Fe in 30 automobile emission par-ticulate samples indicated the presence of magnetic particles in them. The values of frequency dependent susceptibility (χfd) showed the absence of superparamagnetic (SP) grains in the samples. The IRM20 mT (isothermal remanent magnetization at 20 mT) being linearly proportional to SIRM (saturation isothermal remanent magnetization) (R2=0.901), suggested that ferrimagnetic minerals were responsible for the magnetic properties of automobile emission particulates. The average contents of Cu, Cd, Pb and Fe in automobile emission particulates were 95.83, 22.14, 30.58 and 34727.31 mg/kg, respectively. Significant positive correla-tions exist between the magnetic parameters and the contents of Pb, Cu and Fe. The magnetic parameters of automobile emission particulates reflecting concentration of magnetic particles increased linearly with increase of Pb and Cu content, showed that the magnetic measurement could be used as a preliminary index for detection of Pb and Cu pollution. | 卢升高 白世强 蔡景波 徐昶 | 2005 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2005，6，8： | 4 |
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