Advances of in-situ remediation for heavy metal pollution in agricultural soils

Heavy metal pollution in agricultural soil is one of the hot issues in soil environmental safety research, which affects crop food safety and threatens human health.Heavy metal pollution in agricultural soil is mainly with low and medium concentration pollutants, and its remediation is quite different from that for general heavy metal pollution.Remediation for heavy metal pollution in agricultural soil should meet the farmland needs.In this paper, we reviewed some existing methods and practices in the prevention and control of heavy metals in agricultural soil at home and abroad; discussed in-situ remediation techniques for various agricultural soils, and analyzed the advantages and limitations of several types of in-situ remediation methods in agricultural soil including physical restoration, chemical remediation, bioremediation and combined remediation.Future study on in-situ remediation technology in agricultural soils are proposed.