Insight on the Natural Moroccan Clay Valorization for Malachite Green Adsorption: Kinetic and Isotherm Studies
Hassan OUALLAL, Mohammed CHRACHMY, Najia EL HAMZAOUI, Mahdi LECHHEB, Rajae GHIBATE, Houssam EL-MARJAOUI, Mohamed AZROUR
download PDFAbstract. This work investigates the potential of Natural Moroccan Clay (NMC) sourced from the Draa-Tafilalet region for removing malachite green from aqueous media through adsorption. X-ray diffraction (XRD) and scanning electron microscopy combined with energy-dispersive X-ray microanalysis (SEM/EDX) were used to characterize the clay. Malachite green (MG) was subjected to batch adsorption experiments, and a kinetic study was carried out at three concentrations (5, 50, and 100 mg/L). The results showed that adsorption is typically fast for all three concentrations and that the adsorbed amount rises with time and dye concentration. Equilibrium is reached within just 40 minutes. The kinetics adsorption at varying MG concentrations were modeled using non-linear and linear forms of pseudo-first order and pseudo-second order and with intraparticle diffusion models. The non-linear form of the pseudo-second-order model was found to be best suited to describing this adsorption process. The isotherm was studied using two models: Freundlich and Langmuir. According to the error functions analysis, the Langmuir model is well suited for equilibrium data fitting. Investigated clay attained an adsorption capacity of 214 mg/g. SEM/EDX characterization of NMC before and after adsorption confirms the malachite green adsorption on the NMC surface. These results illustrate the effectiveness of the investigated clay as a cost-effective adsorbent.
Keywords
Natural Clay, Adsorption, Malachite Green, Kinetic Modeling, Isotherm Study
Published online 3/15/2024, 11 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Hassan OUALLAL, Mohammed CHRACHMY, Najia EL HAMZAOUI, Mahdi LECHHEB, Rajae GHIBATE, Houssam EL-MARJAOUI, Mohamed AZROUR, Insight on the Natural Moroccan Clay Valorization for Malachite Green Adsorption: Kinetic and Isotherm Studies, Materials Research Proceedings, Vol. 40, pp 273-283, 2024
DOI: https://doi.org/10.21741/9781644903117-29
The article was published as article 29 of the book Mediterranean Architectural Heritage
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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