Research Progress of Biochar in Memediation of Contaminated Soil

Abstract

Biochar is a carbon-rich material produced by pyrolysis and carbonization of biomass raw materials (mainly agricultural wastes) under complete or partial hypoxia. Because of its excellent structural properties, it is often applied to contaminated soil as a remediation agent and soil amendment agent. In recent years, biochar has attracted widespread attention in environmental remediation, and has become a research hotspot in current environmental science. This paper introduces the biochar treatment of soil pollution by introducing the concept, preparation method and physicochemical properties of biochar. The research progress of biochar in the treatment of heavy metal contaminated soil in recent years was reviewed. The effect of biochar on the bioavailability of heavy metals in soil was discussed. However, there are still some shortcomings in current research and remediation methods. It is expected to find environmentally friendly, scientific and reasonable materials and technologies to repair soil pollution.