Adsorción en sistema binario de Pb (II) y Ni (II) utilizando cáscaras de limón

Autores/as

  • Candelaria Tejada-Tovar Universidad de Cartagena
  • Angel Villabona-Ortíz Universidad de Cartagena
  • César Sierra-Ardila Universidad de Cartagena
  • Marlyz Meza-Acuña Universidad de Cartagena
  • Rodrigo Ortega-Toro Universidad de Cartagena https://orcid.org/0000-0003-0815-5317

DOI:

https://doi.org/10.17533/udea.redin.20200691

Palabras clave:

modelos matemáticos, termodinámica, metales, aguas residuales

Resumen

La eliminación de contaminantes en fuentes hídricas es un tema ampliamente estudiado con el fin de preservar el medio ambiente. En este trabajo, se estudia el uso de cáscara de limón (Citrus limon) como bio-adsorbente en la remoción de Pb (II) y Ni (II), variando la temperatura, dosis de adsorbente y tamaño de partícula. Los materiales se caracterizaron por análisis de Espectroscopia Infrarroja por Transformada de Fourier (FTIR), Microscopía Electrónica de Barrido (SEM) y Espectroscopia de dispersión de energía de rayos X (EDS) para determinar las propiedades fisicoquímicas de los bio-adsorbentes. Las técnicas FTIR y EDS confirmaron la precipitación de iones sobre el adsorbente después del proceso de adsorción. Se encontró que las condiciones óptimas de acuerdo con la Metodología de Superficie de Respuesta (RSM) son: tamaño de partícula para Ni (II) de 1 y 0,355 mm, dosis de adsorbente 0,077 g y 0,117 g, y temperaturas de 34 y 45 ºC, para Pb (II) y Ni (II), respectivamente. Los resultados informaron que la isoterma de Dubinin-Radushkevich y el modelo de pseudo-segundo orden se ajustan mejor a los datos experimentales, lo que sugiere que el proceso de adsorción se rige por fisisorción y se da en multicapas. Los parámetros termodinámicos sugieren que el proceso es exotérmico para Ni (II) y endotérmico para Pb(II), e irreversible. El estudio binario mostró que no hay competencia por los sitios activos entre los iones.

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Biografía del autor/a

Candelaria Tejada-Tovar, Universidad de Cartagena

Departamento de Ingeniería Química, Grupo de Investigación de Diseño de Procesos y Utilización de Biomasa.

Angel Villabona-Ortíz, Universidad de Cartagena

Departamento de Ingeniería Química, Grupo de Investigación de Diseño de Procesos y Utilización de Biomasa.

César Sierra-Ardila, Universidad de Cartagena

Departamento de Ingeniería Química, Grupo de Investigación de Diseño de Procesos y Utilización de Biomasa.

Marlyz Meza-Acuña, Universidad de Cartagena

Departamento de Ingeniería Química, Grupo de Investigación de Diseño de Procesos y Utilización de Biomasa.

Rodrigo Ortega-Toro, Universidad de Cartagena

Profesor, Departamento de Ingeniería de Alimentos. Grupo de Investigación Food Packaging and Shelf Life (FP&SL) y Grupo de Investigación Ingeniería de Fluidos Complejos y Reología de Alimentos (IFCRA).

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Publicado

2020-06-16

Cómo citar

Tejada-Tovar, C., Villabona-Ortíz, A., Sierra-Ardila, C., Meza-Acuña, M., & Ortega-Toro, R. (2020). Adsorción en sistema binario de Pb (II) y Ni (II) utilizando cáscaras de limón. Revista Facultad De Ingeniería Universidad De Antioquia, (101), 31–44. https://doi.org/10.17533/udea.redin.20200691