Chemical Data Collections | 2021
Comparative study on adsorption of cationic dyes and phenol by natural clays
Abstract
Abstract Pollution of water by organic compounds from the textile industries is considered as a serious problem for the environment in many countries worldwide. The aim of this study was to examine the effectiveness of adsorption on natural clay using methylene blue and phenol as adsorbates on the treatment of wastewater. Kinetics adsorption of methylene blue and phenol was studied using the pseudo-first-order model and the pseudo-second-order model. Adsorption isotherms of these adsorbates on natural clay were analyzed using Langmuir and Freundlich models. The adsorbed amount (Qm) at equilibrium, increased from 80 mg/g to 204 mg/g for methylene blue and from 6.8mg/g to 10 mg/g for phenol. Positive enthalpy variation (ΔH0\u202f=\u202f18.8 Kj/mol for methylene blue and 11.0 Kj/mol for phenol) indicate that the adsorption process of methylene blue and phenol on natural clay was endothermic.