Remoción De Hierro Y Manganeso De Un Efluente Contaminado Utilizando Una Resina Quelante

Abstract

Palabras clave: metales pesados, quelante, capacidad de adsorción RESUMEN El objetivo de este trabajo fue evaluar la capacidad de la resina quelante Dowex M-4195 para la remoción de hierro y manganeso, a partir de soluciones de dos fuentes: una proveniente de la infiltración de una presa de jales en desuso (J1) y otra de agua residual del proceso de recuperación de cobre (M1). Se aplicó el modelo de Langmuir para determinar la capacidad de adsorción de la resina. El análisis de los resultados muestra una capacidad de adsorción de 7.5 mg Fe/g de resina y 4.0 mg Mn/g, con remoción de 70 y 25 %, respectivamente para la muestra J1 en un tiempo de contacto de 12 h. Para la muestra M1 fue de 12.5 mg Fe/g y de 2.96 mg Mn/g, con remoción del 58 y 20% para cada metal, en un tiempo de contacto de 5 h. Los resultados del análisis de espectroscopía de infrarrojo de transformada de Fourier (FTIR) muestran las modificaciones en los enlaces del grupo funcional de la resina debido a la adsorción de los metales. Estos resultados indican que el uso de la resina quelante Dowex M-4195 puede ser una alternativa a los tratamientos convencionales para la recuperación o remoción de metales pesados de soluciones acuosas.Key words: heavy metals, chelating, adsorption capacity ABSTRACTThe objective of this study was to evaluate the ability of removing iron and manganese in the chelating resin Dowex M-4195, from solutions of the infiltration from a tailing dam (J1) and a wastewater in copper recovery process (M1). The Langmuir model was used to determine the adsorption capacity of the resin. The results show an adsorption capacity of the resin of 7.5 mg Fe/g and 4.0 mg Mn/g with a removal of 70 and 25 %, respectively for sample J1, with a contact time of 12 h. For sample M1 it was obtained 12.5 mg Fe/g and 2.96 mg Mn/g, with a removal of 58 and 20 % for each metal with a contact time of 5 h. Results of FTIR analysis show modifications in the functional groups bonded to the resin due to adsorption of metals. These results indicate that the use of resin Dowex M-4195 can be an alternative to conventional treatments for the recovery or removal of heavy metals from aqueous solutions.

Efficient and Sustainable Bidentate Amines-Functionalized Resins for Removing Ag+, Cu2+, Pb2+, and Fe3+ from Water

“…On the other hand, Martinez-Meza's CR, which exhibited similar selectivity, was found to have no reusability. Moreover, only 50% of the cation was released after a 12 h treatment [27]. Martinez-Meza's CR and MR-AMP showed a better adsorption capacity at a pH close to 2, which indicates that a higher acidity medium is more favorable for Fe 3+ adsorption (Table 2).…”

“…Finally, the synthesized CR was oven-dried for 12 h at 40 • C. After repeating this procedure three times, all the reactive sites were substituted. The products were characterized by IR spectroscopy, fluorescence spectroscopy, and the Volhard method [23,[26][27][28].…”

“…Martinez-Meza (2017) prepared the CR Dowex-M4195a with the ability to absorb Fe 3+ cations. This resin was mentioned as an alternative to conventional treatments for removing PTEs from an aqueous solution [27].…”