Unravelling the sorption mechanism of two organic dyes (Indigo Carmine and Orange II) onto Al-Fum MOF: Kinetic and isotherm scrutinization
Mbega A.-Y.-S. Fotsop C.G. Tchuifon D.R.T. Kouteu P.A.N. Feudjio F.D.S. Bopda A. Baigenzhenov O. Hosseini-Bandegharaei A.
September 2025Elsevier B.V.
Results in Engineering
2025#27
This study aims to synthesize and characterize a fumarate-Al-based Metal-Organic Framework (Al-Fum MOF) to evaluate its adsorption properties towards two organic dyes, namely: Indigo Carmine (IC) and Orange II (OII). The Al-Fum MOF was synthesized by a non-solvothermal method and characterized by XRD, FTIR, EDX, TGA, N2 sorption and pHPZC. The results of this work show that the pseudo-second-order model better describes the adsorption process for both dyes. The plausible mechanisms reveal a duality between the physisorption phenomenon and physicochemical interactions, the latter being predominant. The optimal conditions for adsorption were determined using centered composite experimental designs, resulting in error percentages below 2 %: for IC (pH 3, concentration of 84.7 mg/L and adsorbent mass of 25 mg) and for OII (pH 3, concentration of 100 mg/L and adsorbent mass of 25 g). The adsorbed amounts were 33.8 and 22.9 mg/g for IC and OII, respectively. The regeneration of Al-Fum MOF was studied and the results suggest that the material can remain active during several use cycles. This study contributes to the advancement of knowledge on adsorbent materials for wastewater treatment and highlights the potential of Al-Fum MOF for practical applications. However, further studies are needed to evaluate the application of Al-Fum MOF to real and complex wastewater.
Adsorption , Al-Fum MOF , Indigo Carmine (IC) , Optimization , Orange II (OII)
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Laboratory of Chemical Engineering and Industrial Bio-Processes (LCEIBP), National Higher Polytechnic School of Douala, University of Douala, P.O. Box 2701, Douala, Cameroon
Institute of Chemistry, Faculty of Process and Systems Engineering, Universität Platz 2, Magdeburg, 39106, Germany
Process Engineering Laboratory, Ucac-Icam Institute, P.O Box 5504, Douala, Cameroon
Laboratory of Applied Physical and Analytical Chemistry, Department of inorganic Chemistry, Faculty of Science, University of Yaoundé 1, PO Box 812, Yaoundé, Cameroon
Advanced School of Mines Processing and Energy Resources, University of Bertoua, P.O. Box 416, Bertoua, Cameroon
Department of Metallurgical Engineering, Satbayev University, Almaty, Kazakhstan
Faculty of Chemistry, Semnan University, Semnan, Iran
Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Tamil Nadu, Chennai, 602105, India
Research and Innovation Cell, Rayat Bahra University, Punjab, Mohali, India
Laboratory of Chemical Engineering and Industrial Bio-Processes (LCEIBP)
Institute of Chemistry
Process Engineering Laboratory
Laboratory of Applied Physical and Analytical Chemistry
Advanced School of Mines Processing and Energy Resources
Department of Metallurgical Engineering
Faculty of Chemistry
Department of Sustainable Engineering
Research and Innovation Cell
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