Regeneration of Phenol Exhausted Activated Carbons Used In the Operations of Water Treatment by Domestic Microwave Oven

Mohamed Dawam¹ , Mohamed A. Elsayed² , Mohamed Nasser³ , Nabil. Abdelmonem⁴

Section:Research Paper, Product Type: Journal-Paper
Vol.8 , Issue.2 , pp.11-17, Apr-2021

Online published on Apr 30, 2021

Copyright © Mohamed Dawam, Mohamed A. Elsayed, Mohamed Nasser, Nabil. Abdelmonem . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
In this work, the regeneration of spent granular activated carbons (GAC) saturated with phenol was studied. The process was conducted in an aqueous solution via domestic microwave oven. The investigation was achieved to evaluate its adsorption efficiency after successive regeneration cycles and to ensure its practical feasibility. Different factors have been studied such as microwave power level, pH of the solution, weight of the active carbons; volume of the regenerated solution, number of adsorption and regeneration cycles. A mathematical model has been developed to measure the regeneration efficiency of the GAC adsorption capacity. It was found that, for the same power level, as the time of exposure increases, the regeneration efficiency increases. As, the microwave oven power increase from 160 to 800 W, the regeneration efficiency increases from 60 to 90% after 1.5 min of radiation time, during the regeneration process the pH of the solution increase from about 6.03 to 7.15, after 4-5 adsorption/regeneration cycles the adsorption efficiency falls down from 90 to 55%.

Key-Words / Index Term :
Regeneration, adsorption, desorption, microwave, active carbon, phenol removal

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