Abstract：Modified phosphorus slag (MPS) and portland cement (OPC) were used to stabilize lead-contaminated soils. Leaching test， sequential extractions test and XRD test were conducted to investigate the variation of stabilize properties of MPS treated lead-contaminated soils along with MPS and OPC dosage. Results showed that the OPC and MPS could reduced Pb leaching concentration of stabilized soil， while the environmental security characteristics of MPS stabilize soil is better than OPC stabilize soil. Sequential extraction procedures revealed that the majority of acid soluble fraction of Pb were converted to reducible fraction with OPC stabilized. While the majority of acid soluble fraction of Pb was converted to oxidizable fraction with MPS stabilized. XRD test revealed that the stabilized mechanism of Pb in OPC stabilized soil was encapsulated， adsorption and precipitation. While the estabilized mechanism of Pb in MPS stabilized soil was Pb5[PO4]3Cl precipitation. The difference of lead concentration of OPC and MPS stabilized soil was attributed to the difference of species distribution and stabilized mechanism of Pb.
2018, Vol. 52 
