EVALUACIÓN DE HIDROGELES DE ACRILAMIDA-co-ÁCIDO ITACÓNICO EN LA DISMINUCIÓN DE IONES DE Fe CON POTENCIALES USOS EN PLANTAS PARA TRATAMIENTO DE AGUAS POTABILIZADAS

Abstract

In the following work copolymers hydrogels were synthesized from acrylamide with itaconic acid (AAm-co-AI) in deionized water. Persulphate ammonium (PSA) was used as initiator and N, N`-methylenebisacrylamide (NMBA) as crosslinking agent. Determining the degree of swelling (GH) was performed gravimetrically in deionized water and FeSO4.3H2O solutions, finding that GH presented a decrease from 9286 % in deionized water to 557 % in a solution of 150 mg/L of Fe2+, these variations can be explained in terms of ionic crosslinking generated and evaluating the complex formation between C=O groups and Fe ions, which would be replacing the hydrogen bond formation with water. The effect of initial concentration of the FeSO4•3H2O solutions on the absorption capacity of Fe2+ in synthesized hydrogels was studied. These solutions were prepared with the following concentrations of Fe2+ :10 mg/L, 30 mg/L, 50 mg/L, 100 mg/L y 150 mg/L found an increase in the absorption capacity when the initial concentration of solution was increased. The result are important because they give as evidence about the initial characteristics that must have the effluent to be treated to achieve the highest possible absorption of Fe2+ ions in hydrogels, to its application in the treatment of water for drinking.