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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.8 P.731~735

http://doi.org/10.1631/jzus.2005.B0731


Magnetic properties and heavy metal contents of automobile emission particulates


Author(s):  LU Sheng-gao, BAI Shi-qiang, CAI Jing-bo, XU Chuang

Affiliation(s):  School of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   lusg@zju.edu.cn

Key Words:  Automobile emission particulates, Magnetic properties, Heavy metal, Environmental magnetism


LU Sheng-gao, BAI Shi-qiang, CAI Jing-bo, XU Chuang. Magnetic properties and heavy metal contents of automobile emission particulates[J]. Journal of Zhejiang University Science B, 2005, 6(8): 731~735.

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author="LU Sheng-gao, BAI Shi-qiang, CAI Jing-bo, XU Chuang",
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%DOI 10.1631/jzus.2005.B0731

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T1 - Magnetic properties and heavy metal contents of automobile emission particulates
A1 - LU Sheng-gao
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%@ 1673-1581
Y1 - 2005
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2005.B0731


Abstract: 
Measurements of the magnetic properties and total contents of Cu, Cd, Pb and Fe in 30 automobile emission particulate 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 correlations 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.

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