VALORISATION DES PELURES DE POMMES DE TERRE POUR LE TRAITEMENT D’UNE SOLUTION AQUEUSE CONTENANT UN COLORANT TEXTILE (REACTIVE BLUE 72)

The aim of this work is to use agricultural wastes such as potato peels (PP) as an effective low-cost biosorbent for the removal of turquoise blue dye (TB) from aqueous solutions. Adsorption of the potato peels has been studied as a function of pH, initial dye concentration, particle size and contact time. The adsorption equilibrium was represented with Langmuir and Freundlich isotherm models. This study has resulted in the determination of the two types of adsorption isotherms: the Freundlich and the type I Langmuir adsorption isotherms. (R2 value is 0.94), the maximum capacity for TB adsorption was shown to be equal to 76.92 mg. g-1. The results showed that the adsorption process of TB dye followed pseudo-second order kinetic (R2 value is 0.999). The calculated values of ΔH° and ΔS0 were found to be 6.82 KJ.mol-1 and 44.01 J.mol-1.K-1, respectively. Adsorption process was spontaneous and endothermic