Adsorption kinetics, thermodynamics, modeling and optimization of bisphenol A on activated carbon based on Hyphaene Thebaica shells
Mahamane Nassirou Amadou Kiari, Affoué Tindo Sylvie Konan, Ousmaila Sanda Mamane, Leygnima Yaya Ouattara, Maman Hamissou Ibrahim Grema, Maâzou Siragi Dounounou Boukari, Abdourahamane Adamou Ibro, Maman Mousbahou Malam Alma, Kouassi Benjamin Yao
Abstract
This work is part of the fight against environmental pollution in relation to the elimination of bisphenol A (BPA). The aim of this study was to develop an innovative process involving cross-current adsorption of BPA on an activated carbon based on Hyphaene Thebaica (CA-HT) shells. Cross-current adsorption tests yielded removal rates of 99.48 % and 82.02 % in synthetic and BPA-doped solutions respectively. Optimal factors were obtained by a composite design for a concentration of 80 mg/L and 50 mg activated carbon. Pseudo-second-order kinetics and the Freundlich isotherm were the appropriate models. Thermodynamic values indicate that the process was spontaneous and exothermic. • Low-cost activated carbon Hyphaene Thebaica was used to remove bisphenol A. • Crosscurrent adsorption was proposed in a synthetic solution doped with bisphenol A. • Removal was optimized by the composite central plane via crosscurrent adsorption. • Maximum capacities were obtained after nine adsorption with a time of 720 minutes. • The removal of bisphenol A showed that the process was spontaneous and exothermic.