Mass Transfer Selection and Optimization by RSM of the Multicomponent Adsorption of Cr Ions, Ba2+, BTEX and Phenol on Alginate Biomass-Kaolin Biogenic CaCO3 Biochar Composite
Authors: *Agbale, N.R., Ajieh, M.U., Ukrakpor, F.E., Amoren, L.E. And Edegbe, G.N.
DOI Info: http://doi.org/10.5281/zenodo.15805039
ABSTRACT
Water crises has been a major global challenge, and researches are continuously ongoing to proffer solutions to the crises at an optimal cost. To further optimize cost, it is imperative that the process is designed using computational tools to establish and optimize process parameters. The kinetics models used for the study of the mass transfer in adsorption have been limited to some certain models. This work focuses on the optimization of the adsorption process using central composite design of RSM in the adsorptive removal of Cr ions, Ba2+, BTEX and phenol, and the study of the mass transfer models to determine the suitable rate controlling mechanisms. The removal efficiency for the competitive adsorption of Cr ions, Ba2+, BTEX and phenol from real produced water are 97.43, 77.67, 88.53 and 86.28% respectively, at optimized conditions of 25 oC, pH of 5.95, and adsorbent dosage of 2.4 g. The mass transfer studies conducted showed that the rate controlling steps may differ with the model used. Cr ions had the highest diffusion constant of for the Boyd’s model. The Frusawa and Smith model showed that BTEX and phenol had the highest R2 of 0.9332 and 0.943 respectively, but with the least diffusion constants. The models have shown that adsorption can occur by film and intraparticle diffusion.
Affiliations: Department of Chemical Engineering, Faculty of Engineering, Delta State University, Oleh Campus, , Delta State, Nigeria.
Keywords: Adsorption, Optimize, Produced Water, Kinetics, Mass Transfer
Published date: 2025/06/30
