Chemical modification of biochar to obtain sorbents with specified properties
Abstract
Chemical modification of biochar to obtain sorbents with specified properties
Incoming article date: 28.10.2024The paper presents an analysis of the methods for the chemical modification of biochar. The characteristics of acid and basic modifications, modifications with hydrogen peroxide, sulfonation, amination, impregnation with metal oxides, and magnetization are examined. It is demonstrated that the method of modification, the parameters of the technological process, and the nature of the modifying agent all exert an influence on the chemical composition, structure, porosity, pore size, and total specific surface area of the modified coal. The combination of methods, technological parameters, and modifiers allows for the production of sorbents for wastewater treatment based on biochar with specific properties for the sorption of certain groups of different pollutants.
Keywords: biochar, chemical modification, sorption properties, porosity, pore size