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Análisis fisicoquímico de interacción de los ácidos húmicos con colorante (rojo allura AC) en presencia de metales
Summary
Researchers performed physicochemical analysis of humic acid aggregation and coagulation with the food dye Allura Red (Red 40) in the presence of Fe3+, Al3+, Ca2+, and Mg2+ coagulants at pH 5 and 7, finding that humic acid from leonardite showed the greatest interaction with Fe3+ at pH 5, removing up to 68% of organic matter, with overall dye removal efficiencies of 50-60% at neutral pH.
El análisis fisicoquímico de agregación y coagulación de la materia orgánica (MO): ácidos húmico-colorante (AH-CR) en presencia de agentes coagulantes (sales de Fe3+, Al3+, Ca2+ y Mg2+) y la modificación del pH a 5 y 7. Se analizaron las disoluciones por espectroscopia UV-VIS, obteniendo los espectros (l= 200 a 700 nm) para la adecuada selección de la concentración y cuantificación del colorante (CR) rojo 40 (absorbancias, l= 496 nm). No obstante, registrando las propiedades espectroscópicas (ε280, %A y PMpromedio) mediante la absorbancia a una l= 280 nm, debido a las insaturaciones de la macromolécula del AH. En la evaluación de los AHs como un posible polielectrolito, el AHLe presenta mayor interacción con la sal de Fe3+ a pH de 5, eliminado hasta un 68% como MO en disolución. En la eliminación del CR en solución acuosa, presentando el siguiente orden: AHCe-CR-Al > AHTr-CR-Fe > AHAv-CR-Al y obteniendo un porcentaje de eliminación entre 50-60% como MO total a pH neutro.
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