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Adsorption of industrial dye by natural Moroccan zeolite: a promising approach for wastewater treatment

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Abstract

The aim of this work is to study the performance of natural Moroccan zeolite for effluent dye removal. The obtained results indicate that the adsorption process efficiency increases when increasing the adsorbent weight and reaction time, versus increasing the adsorbent particle size and temperature, which results in a significant decrease in adsorption efficiency. The experimental kinetic data fit well the pseudo-second-order model. The experimental isotherm data were analyzed using linear isotherm models with two parameters (Langmuir, Freundlish, Temkin, and Dubinin–Radushkevich) and nonlinear isotherm models with three parameters (Redlish–Peterson, Sips, and Toth). The nonlinear transform models provided the highest R2 correlation coefficient. The qm = 298.15 mg g-1 value indicates a high adsorption capacity and that natural Moroccan zeolite (NMZ) is a good adsorbent to remove coloring effluents. A thermodynamic study was realized, calculating the thermodynamic parameters ΔG, ΔS, and ΔH. Desorption was studied for nine chemical solutions, while reusability was determined with 14 cycles of adsorption. The results of this study will be useful for future applications of this material as an abundant and low-cost adsorbent for removal of anionic dyes.

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Meryem El rharib, Latifa Goulhay, and Zaina Zaroual. The first draft of the manuscript was written by Meryem El rharib and Zaina Zaroual, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Zaina Zaroual.

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Responsible Editor: Mongi Seffen.

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Rharib, M.E., Goulhay, L., Slek, Y. et al. Adsorption of industrial dye by natural Moroccan zeolite: a promising approach for wastewater treatment. Euro-Mediterr J Environ Integr (2024). https://doi.org/10.1007/s41207-024-00513-3

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  • DOI: https://doi.org/10.1007/s41207-024-00513-3

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