Synthesis of ultrasonicated amine-functionalized MgO-deposited empty fruit bunch (EFB)-derived biochar for CO2 adsorption

In this study, biochar derived from empty fruit bunch (EFB) was modified by sonication, amine functionalization, and MgO deposition to increase CO2 uptake capacity towards addressing the global warming problem. The optimal conditions for amine functionalization were a biochar to melamine mass ratio of 5:2, an activation temperature of 700 °C, and a heating rate of 15 °C/min. The sequential sonication, amine functionalization, and MgO deposition resulted in the ultrasonicated amine-functionalized MgO-deposited biochar (UAMB) with the highest CO2 uptake capacity of 84.95 mg/g, which is a 142