Research Progress on the Preparation and Application of Biochar-based Composite Hydrogels
Biochar-based composite hydrogel has excellent physicochemical properties.Thus it has been studied and applied in many fields in recent years.In this paper,the preparation methods of biochar-based composite hydrogels were reviewed,such as physical cross-linking method and chemical cross-linking method.The applications of biochar-based composite hydrogels in removing pollutants in water,soil im-provement,increasing crop yield,slow-releasing fertilizer and alleviating plant heavy metal stress were summarized,and the application mechanism and action mechanism were expounded.On this basis,the future research direction of biochar-based composite hydrogels was prospected,the existing problems and potential risks in the application of biochar-based composite hydrogels were analyzed,and the corre-sponding suggestions were put forward.
biocharcomposite hydrogelenvironmental restorationadsorption towards heavy metalssewage treatment
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