Facile fabrication of sulfamic acid / Al-MIL-53 for Congo red removal

Document Type : Original Article

Authors

Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt

Abstract

Solvothermal method was used for preparation of AL-MIL-53 MOF and modified by different amounts of sulfamic acid (SA= 15, 25, 30, 50, and 60%) by impregnation method. MOFs were characterized by Fourier transform infrared spectrometry. This technique confirmed successful loading of sulfamic acid onto Al-MIL-53. The prepared samples were applied to the adsorption of Congo red dye (CR) from wastewater. The amount of adsorption increases by increasing amount of SA till reaches to 25%SA/MIL-53. After this percent of SA, the amount of adsorption decreases. It was obvious that the best adsorption occurs at pH=2. The isotherms and kinetics data were represented by Langmuir adsorption isotherm and pseudo 2nd order kinetic model. 

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