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Evaluación espectroscópica del proceso de coagulación de los ácido húmicos en presencia de Fe3+
Summary
This study evaluated how iron (Fe3+) coagulation affects humic acid removal from water, characterizing changes in organic matter structure through spectroscopic analysis. Humic acids in natural water can associate with microplastics and affect their behavior and toxicity in aquatic environments.
Los ácidos húmicos (AHs) son los componentes principales y más abundantes de la materia orgánica (MO). En este estudio se realizó una evaluación de AHs mediante parámetros espectroscópicos, posteriormente a un proceso de aglomeración, coagulación y microfiltración en presencia de hierro (Fe3+) como agente coagulante y mediante la cuantificación por el método de calibración. También se analizó fisicoquímicamente el comportamiento de la macromolécula de húmico en presencia del metal, ajustando el pH a 5, condición a la que se lleva a cabo la deprotonación de los grupos carboxílicos (-COOH), estabilizando las cargas negativas con una concentración mínima pero efectiva de la sal de Fe3+(3 mM). Mediante este proceso se logró eliminar un promedio del 96% de AH como MO en solución. Las cinéticas del proceso de interacción AH-Fe se desarrollaron en tiempos cortos, menores a los 5 min. No obstante, los espectros presentan una gran similitud en relación con las absorbancias, sin embargo, es recomendable llevar a cabo la microfiltración en los primeros 30 min de reacción.
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