| Heavy metal of sudden polluted soil was fixed by lime and fly ash, the content of heavy metal were analyzed by the TCLP and Tessier form for evaluation of heavy metal pollution in soil. The results indicated that compared with the control, the treatment with 0.1% lime addition could significantly decrease the concentrations of Cu and Cd after 1 months incubation ( 68.13%, 76.67% decrease for Cu and Cd, respectively) by TCLP method. The treatment with 8% fly ash addition could significantly decrease the concentrations of Cu and Cd at the same condition. And the leaching contents of Cu and Cd were lower than the threshold of the standard, after adding the
amendments to the polluted soil, the main reason is that the content of exchangeable Cu and Cd turns to carbonate and Fe-Mn oxide Cu and Cd. |
