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Cerium Oxide (CeO2) Nanoparticles for Effective Adsorption of Chromium (III) Ions from the Tannery Effluent Wastewater.

Authors :

Mohammed Jaafar Ali Alatabe¹

1- Mustansiriyah University/ College of Engineering

Keywords :

Adsorption،Chromium(III) Ions،Cerium Oxide NP،Tanning Effluent.

Abstract :

The purification of wastewater originating from industrial, agricultural, and domestic activities poses a significant challenge. Heavy metals, which have the potential to be toxic, non-biodegradable, and to accumulate in the ecosystem even in low concentrations, are of particular concern. The efficacy of adsorption in removing heavy metals from aqueous solutions has been well-established. This investigation focuses on Chromium(III) ions efficient adsorption from wastewater tanning effluent by Cerium Oxide (CeO2) nanoparticles. The properties of Cerium Oxide (CeO2) nanoparticles were examined through the use of Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy spectra, and Scanning Electron Microscopic (SEM) analysis. The present investigation sought to scrutinize various parameters, namely adsorbent dosage, temperature, pH of the solution, mixer speed, and contact time. The Langmuir, Freundlich, Temkin, and Harkins-Henderson isotherm models were employed, and the resulting coefficients were determined as 0.99, 0.80, 0.95, and 0.68, respectively. In comparison with other models, the Langmuir model was found to be more suitable for elucidating the adsorption process. The study also obtained results concerning kinetics, with the Pseudo-first-order exhibiting a value of 0.989, Pseudo-second order showing 0.947, Intra particle diffusion generating 0.969, and Elovich model producing 0.905. As per the results, the Pseudo-first-order kinetic equation was determined as the most appropriate one for characterizing the kinetics of the reaction. The experimental study shows that the synthesized adsorbent removed Chromium (III) Ions highly efficiently from the tannery Effluent Wastewater.

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