Bibliographic citations
Ponce, G., (2024). Obtención, caracterización y evaluación de la capacidad de adsorción de Cromo (VI) en Carbón Activado obtenido del epispermo de la semilla de Lúcuma (Pouteria lúcuma) [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/6909
Ponce, G., Obtención, caracterización y evaluación de la capacidad de adsorción de Cromo (VI) en Carbón Activado obtenido del epispermo de la semilla de Lúcuma (Pouteria lúcuma) []. PE: Universidad Nacional Agraria La Molina; 2024. https://hdl.handle.net/20.500.12996/6909
@misc{renati/1114611,
title = "Obtención, caracterización y evaluación de la capacidad de adsorción de Cromo (VI) en Carbón Activado obtenido del epispermo de la semilla de Lúcuma (Pouteria lúcuma)",
author = "Ponce Ramirez, Gabriel Brandon Jostin",
publisher = "Universidad Nacional Agraria La Molina",
year = "2024"
}
This study focused on the production, characterization, and evaluation of hexavalent chromium (Cr VI) adsorption capacity using activated carbon derived from the episperm of the lúcuma seed (Pouteria lúcuma), an agro-industrial residue. Chemical activation with phosphoric acid (H₃PO₄) was applied, varying the following parameters: carbonization temperature (400°C, 600°C, and 800°C), pyrolysis time (15, 30, and 45 minutes), and impregnation ratio (0.75 and 1.5 g/g). Additionally, the influence of pH (4 and 7) on the adsorption process was assessed. The proximate analysis of the precursor material showed a moisture content of 5.47%, volatile matter of 75.26%, total ash content of 0.51%, and a fixed carbon content of 24.23%. These results indicate that the episperm is a low-ash precursor material, which facilitates the production of highly adsorptive activated carbon. The experimental results revealed that the optimal conditions for Cr (VI) adsorption were achieved at a carbonization temperature of 400°C, a pyrolysis time of 30 minutes, an impregnation ratio of 1.5 g/g, and a pH of 7. Under these conditions, the activated carbon reached 100% Cr (VI) adsorption within 10 minutes. The Freundlich model provided the best fit for the experimental data, with a determination coefficient (R²) of 0.9716, a Kf value of 20.52, and an n value of 4.36, indicating favorable and efficient adsorption. These findings suggest that activated carbon derived from the episperm of the lúcuma seed is a viable and cost-effective alternative for Cr (VI) removal from contaminated water.
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