Degradación de amoxicilina mediante la reacción fenton usando arcillas pilarizadas con Fe/Al

Abstract

Pilarized clay catalysts (B-Pilc) with a Fe / Al mass ratio of 5, 10 and 20% obtained by the pilarization process by the addition of aluminum polyhydroxycation (Al keggin ion) were evaluated in the Fenton oxidation of Amoxicillin in aqueous solution. For the synthesis of the catalysts, we started with a natural bentonite from Valle del Cauca, Colombia, which was put into a swelling and homoionization process to remove ions and unwanted contaminants, to then make a cation exchange with the keggin ion of Al and finally add iron to the catalyst. The pilarized clays were characterized by different techniques that allowed determining the Fe reducibility, the particle size, the chemical composition and the morphology in order to corroborate the correct synthesis of them. The catalytic evaluation was carried out following a factorial design 33 with central points whose variables were catalyst mass, Fe/Al ratio and H2O2 concentration. Under these conditions, 70% of the tests carried out exceeded 50% conversion of the amoxicillin molecule to other organic species, having a maximum of 81% for the T4 test corresponding to the B-Pilc catalyst with a Fe/Al ratio of 5% , a mass of 500 mg and a concentration of H2O2 0.2M.