Research Advances on the Fixation of Soil Heavy Metals by Iron Oxide

Iron (hydr) oxide and its precursors have been widely used in the in-situ remediation of heavy metal contaminated soils. It can be used alone or in combination with other passivating agents. Although the application of iron oxides to remediate heavy metal contaminated soil has achieved partial success, there is still a lack of a unified understanding of the effects and stability of long-term and large-scale applications. Based on the summary of the results of iron oxide remediation of heavy metal contaminated soil, the effects of plants and microorganisms on the stabilization of arsenic by iron (hydr) oxide were discussed, aiming to provide theoretical support for the remediation of contaminated soil and the stabilization of pollutants.