Journal of Zhejiang University Science B

, Volume 6, Issue 8, pp 731–735 | Cite as

Magnetic properties and heavy metal contents of automobile emission particulates

  • Lu Sheng-gao
  • Bai Shi-qiang
  • Cai Jing-bo
  • Xu Chuang
Chemical and Environmental Engineering


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 {ie731-1} showed the absence of superparamagnetic (SP) graiss in the samples. The IRM20mT (isothermal remanent magnetization at 20 mT) being linearly proportional to SIRM (saturation isothermal remanent magnetization)(R 2=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 measurment could be used as a preliminary index for detection of Pb and Cu pollution.

Key words

Automobile emission particulates Magnetic properties Heavy metal Environmental magnetism 

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Copyright information

© Zhejiang University Press 2005

Authors and Affiliations

  • Lu Sheng-gao
    • 1
  • Bai Shi-qiang
    • 1
  • Cai Jing-bo
    • 1
  • Xu Chuang
    • 1
  1. 1.School of Environmental and Resource SciencesZhejiang UniversityHangzhouChina

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