Removal of Congo red from aqueous solution in single and binary mixture systems using Argan nutshell wood
ISSN: 0369-9420
Article publication date: 29 September 2021
Issue publication date: 22 July 2022
Abstract
Purpose
Argan nutshell wood (ANW) has been used in this study as an agricultural solid waste to remove Congo red (CR) from an aqueous solution in single and mixture binary in the presence of methylene blue (MB) or crystal violet (CV).
Design/methodology/approach
The ANW was characterized by Fourier transform infrared and scanning electron microscope analysis. The effect of ANW dose (8–40 gL−1), contact time (0–180 min), pH of the solution (4–11) and CR dye concentration (100–500 mgL−1) on CR adsorption was studied in batch mode and evaluated by kinetic and isotherm models in a single system. In the binary system, the CR removal was studied from a CR + MB and CR + CV mixture with different percentages of dyes, ranging from 0% to 100%.
Findings
The pseudo-second-order and the Langmuir models could best describe the CR sorption onto ANW in a single system. In addition, in the case of the binary system, there is the appearance of a synergistic phenomenon between the CR and the other cationic dyes and the CR adsorption capacity increased until 12.24 mg g-1 and 12.06 mg g-1 in the presence of the MB and CV in the mixture, respectively.
Practical implications
This study demonstrated that ANW prepared can be suggested as an excellent potential adsorbent to remove dyes from wastewaters from single and mixture systems.
Originality/value
This study is original.
Keywords
Acknowledgements
This work is supported by the Laboratory of Applied Chemistry and Environment, Ibn Zohr University, Agadir 80000, Morocco.
Conflict of interests: The authors declare no conflict interests.
Citation
El Khomri, M., El Messaoudi, N., Dbik, A., Bentahar, S., Lacherai, A., Chegini, Z.G. and Bouich, A. (2022), "Removal of Congo red from aqueous solution in single and binary mixture systems using Argan nutshell wood", Pigment & Resin Technology, Vol. 51 No. 5, pp. 477-488. https://doi.org/10.1108/PRT-04-2021-0045
Publisher
:Emerald Publishing Limited
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