Evaluación de Typha angustifolia como filtro remediador de aguas contaminadas con arsénico de la localidad Cruz de Médano, Mórrope – Lambayeque
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Date
2025
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Universidad Nacional de Trujillo
Abstract
El presente estudio financiado por el Canon Minero tiene como objetivo evaluar la eficiencia del material particulado de Typha angustifolia en la biosorción de arsénico (As+5), se evaluó los siguientes parámetros como pH, tamaño de partícula, dosis y tiempo de biosorción sobre soluciones de concentración de arsénico conocidas, se empleó material particulado de la macrófita como biosorbente.
Se determinó la concentración de arsénico a través del método espectrofotometría UV-Vis empleando el dietilditiocarbamato de plata (AgDDTC), que se fundamenta en la generación de arsina, la cual reacciona con el AgDDTC disuelto en piridina, y se forma complejo coloreado rojo vino, la intensidad es proporcional a la concentración de arsénico. leída en a 520 nm. Para comprender el mecanismo de sorción se aplicaron los modelos matemáticos como Langmuir y Freundlich.
Los resultados muestran que el tamaño óptimo de partícula es <0,450 mm, la dosis más efectiva fue de 0.5 – 2.0 g / 200mL de solución, y el pH óptimo para la sorción de As (V) fue de pH 5 y un tiempo de contacto para alcanzar el equilibrio fue de 120 minutos. Además, los modelos matemáticos aplicados indicaron que la capacidad máxima de sorción (isoterma de Langmuir) para Typha angustifolia fue de RL=0.1502 y la constante Kf del modelo de Freundlich fue de Kf =0.9567 a un pH 5.5 las condiciones óptimas se replicaron en muestras de aguas con altos niveles de arsénico provenientes de Cruz de Médano llegando a un 81.1% de remoción. En resumen, los resultados demuestran que es un proceso totalmente favorable y el biosorbente es eficiente para la biosorción de arsénico en agua, de arsénico depende del tamaño de partícula, la dosis de adsorbente, el pH de la solución y el tiempo de contacto.
This study, funded by the Mining Canon, aims to evaluate the efficiency of particulate material from Typha angustifolia in the biosorption of arsenic (As+5). The following parameters were evaluated: pH, particle size, dosage, and biosorption time on solutions with known arsenic concentrations. Particulate material from the macrophyte was used as the biosorbent. Arsenic concentration was determined using the UV-Vis spectrophotometry method with silver diethyldithiocarbamate (AgDDTC), based on the generation of arsine, which reacts with AgDDTC dissolved in pyridine to form a wine-red colored complex. The intensity is proportional to the arsenic concentration and is read at 520 nm. To understand the sorption mechanism, mathematical models such as Langmuir and Freundlich were applied. The results show that the optimal particle size is <0.450 mm, the most effective dosage was 0.5 – 2.0 g/200 mL of solution, and the optimal pH for As(V) sorption was pH 5, with an equilibrium contact time of 120 minutes. Furthermore, the applied mathematical models indicated that the maximum sorption capacity (Langmuir isotherm) for Typha angustifolia was RL = 0.1502, and the Freundlich model constant Kf was Kf = 0.9567 at pH 5.5. These optimal conditions were replicated in water samples with high arsenic levels from Cruz de Médano, achieving 81.1% removal. In summary, the results demonstrate that this is a highly favorable process, and the biosorbent is efficient for arsenic biosorption in water. Arsenic removal depends on particle size, adsorbent dosage, solution pH, and contact time.
This study, funded by the Mining Canon, aims to evaluate the efficiency of particulate material from Typha angustifolia in the biosorption of arsenic (As+5). The following parameters were evaluated: pH, particle size, dosage, and biosorption time on solutions with known arsenic concentrations. Particulate material from the macrophyte was used as the biosorbent. Arsenic concentration was determined using the UV-Vis spectrophotometry method with silver diethyldithiocarbamate (AgDDTC), based on the generation of arsine, which reacts with AgDDTC dissolved in pyridine to form a wine-red colored complex. The intensity is proportional to the arsenic concentration and is read at 520 nm. To understand the sorption mechanism, mathematical models such as Langmuir and Freundlich were applied. The results show that the optimal particle size is <0.450 mm, the most effective dosage was 0.5 – 2.0 g/200 mL of solution, and the optimal pH for As(V) sorption was pH 5, with an equilibrium contact time of 120 minutes. Furthermore, the applied mathematical models indicated that the maximum sorption capacity (Langmuir isotherm) for Typha angustifolia was RL = 0.1502, and the Freundlich model constant Kf was Kf = 0.9567 at pH 5.5. These optimal conditions were replicated in water samples with high arsenic levels from Cruz de Médano, achieving 81.1% removal. In summary, the results demonstrate that this is a highly favorable process, and the biosorbent is efficient for arsenic biosorption in water. Arsenic removal depends on particle size, adsorbent dosage, solution pH, and contact time.
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Keywords
Arsénico, Adsorción, Dietilditiocarbamato de plata, Biosorción