ABSTRACT
Removal of nitrogen and phosphorus from water is the focus of global environmental research. Biochar is a solid material made by pyrolysis, which has many excellent characteristics, such as high porosity and surface area. It is used for the adsorption, recovery, and reuse of nitrogen and phosphorus in wastewater. Compared with the raw biochar, modified biochar with a larger surface area and various functional groups has better adsorption capacity for nutrients in the water. So far, new modification methods include activation with acid or base, loading metal compounds. In this review, the sources of materials, carbonization conditions, and modification methods of biomass are compared, along with the mechanism affecting the adsorption capacity of biochar for nitrogen and phosphorus was analyzed. Finally, the future application of Engineering biochar for the removal and reuse of phosphate and ammonium from wastewater is emphasized.
