Immobilization is an effective method to reduce the toxicity of heavy metals in soil.The ability of modified biochar to immobilize heavy metals has achieved remarkable results,and it has been widely a concern in soil remediation.However,the comprehensive mechanism of immobilizing heavy metals in con-taminated soil by modified biochar needs further exploration.Therefore,CiteSpace data analysis software was used to analyze the mechanism of fixing heavy metals in soil by modified biochar.Oxygen-anionic heavy metals As and cationic heavy metals Cd were taken as examples to analyze the mechanism of immo-bilizing heavy metals in soil by modified biochar.The mechanisms of redox,surface coprecipitation,compl-exation,ion exchange,and electrostatic attraction were reviewed.The reasons and methods of different mechanisms of modified biochar enhancing immobilized soil heavy metal were summarized,and the pros-pect of its treatment of heavy metal pollution in soil was prospected,which provided a reference for the ap-plication of modified biochar in the treatment of heavy metal pollution in soil.
NETL
NSTL
万方数据
