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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Physicochemical Characterization of Clay and Study of Cationic Methylene Blue Dye Adsorption
ACS Omega, Volume 8, No. 43, Year 2023
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Description
In an attempt to examine novel adsorbents in accessing an ideal adsorption system, this study aimed to help understand the main and secondary characteristics of a Moroccan natural clay. X-ray fluorescence, infrared, and scanning electron microscopy with energy-dispersive X-ray spectroscopy analysis (SEM-EDX) were used for the identification. The findings demonstrate that this Clay is composed of a mixture of quartz, calcite, magnetite, and Rutile in very high proportions. SEM revealed the presence of clay grains in the presence of fine particles and irregularly contoured sticks. The results of semiquantitative detection by EDX also reveal the presence of certain mineral species (Si, Al, Mg, Fe, K, Cl, S, Ca, and Na). The exploited kinetic technique was achieved using two different kinetic models: first- and second-order rate laws. Commensurate to the obtained results, the 2-sec order model better described the adsorption of dye MB onto the natural clay. The results confirmed that the adsorption process followed the Langmuir model with the high coefficient correlation obtained which are very close to 1. In the sequel, DFT results revealed that the HOMO and LUMO surfaces of the methylene blue dye are mostly distributed on all dye parts, reflecting possible strong interactions with the clay. The quantum descriptors investigated in this study identify the most nucleophilic and electrophilic centers that can be used to suggest a suitable mechanism for the adsorption of the dye by the clay. The values of enthalpy ΔH0 and entropy ΔS0 of activation were −15.88 kJ mol-1 and −0.021 J mol-1 K-1, respectively, show that the nature of the adsorption process of MB on clay is exothermic and the order of distribution of the dye molecules on the adsorbent increases with respect to that of the solution so the negative values of ΔG0 (from −9. 62 to −8.99 kJ mol-1) indicate that the adsorption process is spontaneous. © 2023 The Authors. Published by American Chemical Society.
Authors & Co-Authors
Bensalah, Jaouad
Morocco, Kenitra
Université Ibn Tofail
Morocco, Rabat
Centre National Pour la Recherche Scientifique et Technique
Ferraa, Nouhaila
Morocco, Kenitra
Université Ibn Tofail
El Mekkaoui, Abdelali
Morocco, Kenitra
Université Ibn Tofail
Berisha, Avni R.
Serbia, Prishtina
University of Prishtina
Safi, Zaki S.
Palestine, Gaza
Al-azhar University of Gaza
Ouaddari, Hanae
Morocco, Kenitra
Université Ibn Tofail
Morocco, Rabat
Centre National Pour la Recherche Scientifique et Technique
Khallouki, Farid El
Morocco, Meknes
Université Moulay Ismaïl
Nafidi, Hiba Allah
Canada, Quebec
Université Laval
Z Gaafar, Abdel Rhman
Saudi Arabia, Riyadh
King Saud University
Bourhia, Mohammed
Morocco, Agadir
Université Ibn Zohr
Habsaoui, Amar
Morocco, Kenitra
Université Ibn Tofail
Statistics
Authors: 11
Affiliations: 9
Identifiers
Doi:
10.1021/acsomega.3c06019
ISSN:
24701343