Abstract:
The physiochemical indicators, heavy metal concentrations of As, Co, Cr, Cu, Mn, Ni, Pb, Zn and magnetic susceptibility in the roadside soils collected from the main streets of Xi′an city were determined. The results showed that the average values of low and high frequency magnetic susceptibility are 181.7×10-8 and 171.9×10-8 m3/kg, respectively. The low and high frequency magnetic susceptibility are positive correlated with loss on ignition (LOI) and sand content significantly, while negative correlated with clay and silt content significantly. Low and high frequency magnetic susceptibility are also positive correlated with Co, Cu, Pb and Zn significantly, but negative correlated with Mn significantly. The pollution loading index of As, Co, Cr, Cu, Mn, Ni, Pb and Zn is also positive correlated with low and high frequency magnetic susceptibility significantly. The magnetic susceptibility can indicate the pollution level of heavy metal in roadside soil of Xi′an city, and reflect traffic pollution and industrial activities emissions are the main human sources leading to soil magnetism rising.
