Relationship between magnetic susceptibility and heavy metal content of soil

摘要

The magnetic susceptibility and the contamination level of soil have been showed a strong correlation since magnetic particle and contaminant are genetically related. The magnetic susceptibility, mineralogical composition and heavy metal content of 30surface soil samples collected from uncontaminated forest, road side in industrial area and abandoned mine area were determined to examine their correlation. The soil samples from industrial and mine areas had a higher magnetic susceptibility and highercontents of heavy metal, magnetite and hematite comparing with the soil samples from uncontaminated forest. There was a strong correlation between the magnetic susceptibility and the content of Fe, Mn, Cr, Ni, Pb and Zn of the soils. They also showed astrong correlation with the content of Fe-oxide and Mn-oxide. The contents of As and Cu revealed a weak correlation with the magnetic susceptibility. However, they showed a strong correlation with the Fe oxide content. The correlation data indicate thatthe magnetic susceptibility measurement can be used as a screening tool of heavy metal level of soil.