Author(s)

Abrar Iskandrani^1,2, Afra M. Baghdadi³, Fatma Bannani¹

¹Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia.
²Department of Chemistry, College of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia.
³Department of Biological Sciences, College of Science, University of Jeddah, Jeddah, Saudi Arabia.

Aiming at developing benign multiple decontamination water adsorbent, using low-cost natural raw local materials, we prepared a modified Bentonite supporting polyoxometalate ionic liquid composite hybrid, where each component targets a specific type of water contaminant. The composite material based on water-insoluble polyoxometalate-ionic liquid (POM-IL) consisting of antimicrobial tetraoctylammonium cations, and saturated Keggin-archetype polyoxometalate [PV₃W₉O₄₀]⁶⁻ anions, immobilized on Bentonite having an interesting dye removal capacity. The Q⁸[PV₃W₉O₄₀]@Bentonite (Q⁸ = TetraOctylAmmonium), composite was tested for cationic dye removal from waste water. Batch experiments for the adsorption of Methylene Blue MB were conducted to investigate the effect factors containing the initial concentration, contact time, adsorbent amount, pH and Temperatures. According to the results of the kinetic study, the pseudo-second-order model fitted better the adsorption experimental data compared to the first order model. The experimental isotherm data were found to fit the Langumir model well compared to the Freundlich model. The thermodynamic parameters illustrated that the adsorption process was endothermic and spontaneous. The results of the present study showed that modified Bentonite represents an excellent multicomponent low-cost adsorbent for the removal of cationic dye and Bacteria from waste water.

Adsorption, Bentonite, Polyoxometalates, Ionic Liquid, Antibacterial, Wastewater Treatment

Iskandrani, A. , Baghdadi, A. and Bannani, F. (2024) Polyoxometalate Supported on Bentonite as Efficient Adsorbent for the Removal of Methylene Blue Dye and Bacteria from Wastewater. Open Journal of Physical Chemistry, 14, 61-81. doi: 10.4236/ojpc.2024.144005.