Heavy metal forms in the process of soil remediation

At present,one of the difficulties in the contaminated soil is the renovation of the polluted soil.Heavy metal forms of soils have been studied in various aspects for contaminated soil remediation.There have been some achievements in such fields as speciation,bioavailability and toxicity of heavy metals.This paper made a review of the researches on heavy metal morphology in soil during the process of soil remediation.The necessity of the investigation of heavy metal forms was also analyzed.It is concluded that the migration and transformation laws of heavy metals in different environmental media should be investigated based on the heavy metal forms existent in soils and plants.In order to prevent organism health risk induced by heavy metals,we should block the chains of heavy metal migration between pollution sources,soil,and plants.This study can provide a theoretical basis for the remediation of heavy metal pollution of soil.