Evaluation of the Effect of Bimetallic Organic Framework M/Fe-MOF (M=Ni, Co) on the Removal of Congo Red Dye

In this study, we investigated the adsorption process of organic Congo red (CR) by M/Fe-MOF (M=Co, Ni) materials. The results of the study show that the optimal adsorption capacity of the materials under the optimal conditions is as follows: Adsorbent weight 0.1 g/L and pH8 for all 3 materials. At the concentration of colorant CR 75 mg/L, the adsorption capacity reached 530 mg/g for Co/Fe-MOF materials; for Ni/Fe-MOF materials, the adsorption capacity reached 560 mg/g, at the colorant concentration CR 140 mg/L; for Fe-MOF materials, the adsorption capacity reached 523 mg/g, at the colorant concentration CR 120 mg/L. The experimental data are consistent with Langmuir and PSO models for both M/Fe-MOF materials (M=Co, Ni). Research results on the reuse process of M/Fe-MOF (M=Co, Ni) materials show that the material is reused 4 times. With this result, it can be considered as the first step to improve the efficiency of pigment adsorption in the current water pollution treatment problem.