Synthesis of Metal–Organic Frameworks for the Adsorption of Congo Red from Wastewater

In this paper, metal–organic frameworks (MOFs) are applied to get rid of Congo red from effluent in an inexpensive and effective manner. Co-containing MOFs (Co-MOF) were prepared via solvothermal treatment, and their structures were tested by performing SEM, TG, and XRD. The MOFs were studied for the removal of CR from wastewater, and the kinetics of the adsorption process were investigated. The results indicated that the pseudo second-order kinetic model properly describes the removal of CR and the maximum adsorption capacity within 5 h is 355.2 mg/g for Co-MOF. The adsorption capacity of the MOFs was evaluated under different pH conditions. This work highlights the broad application prospect of MOFs in sewage disposal.