Effect and influencing factors of modified biochar adsorption for the removal of nitrate nitrogen from water bodies

Nitrate-nitrogen pollution in water is a global problem. The research on the remediation technology of NO3- -N polluted water has become a hot research direction in recent years. Biochar has a good adsorption effect on nitrate nitrogen because of its unique surface structure and rich surface properties. In this paper, the basic properties of biochar are introduced, and the research progress on the adsorption effect of modified biochar for nitrate nitrogen removal and the influencing factors are summarized. The problems and shortcomings in the current technology field were analyzed, and the research prospect and direction of using biochar to remove nitrate nitrogen were pointed out.