Nonmetal function groups of biochar for pollutants removal: A review
Yadong Yang, Yunxian Piao, Ruofan Wang, Yaoming Su, Liu Na, Yutao Lei
Abstract
Biochar (BC) is a sustainable functional material with various feedstocks and has been extensively studied recently for its potential utility in reducing environmental contaminants. The surface functional groups of BC have a significant effect on various reactions. To address complex polluted environments, the composition of the functional groups should be rationally designed. In this study, the process of forming some primary functional groups and the influence on preparation conditions and modification methods are outlined. The redox properties and surface charge distribution that are affected by the functional groups are evaluated. Furthermore, the effect of functional groups on adsorption, catalysis, and the mediation of microbial degradation of pollutants is analyzed. Moreover, perspectives and designs of BC functional groups are summarized. This review provides information on the development of BC decontamination methods using functional groups for synthesis and selectivity.