Articles

Adsorption of Ni(II) ions on pellets of benthonitic clay

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Carlos Mejía Miranda,
Dionisio Laverde,
Verónica Avella,
Darío Yesid Peña Ballesteros

Carlos Mejía Miranda
Escuela de Ingeniería Química, Grupo de Investigaciones en Corrosión, Universidad Industrial de Santander (UIS)
Bio

Dionisio Laverde
Escuela de Ingeniería Química, Grupo de Investigaciones en Corrosión, Universidad Industrial de Santander (UIS)
Bio

Verónica Avella
Escuela de Ingeniería Química, Grupo de Investigaciones en Corrosión, Universidad Industrial de Santander (UIS)
Bio

Darío Yesid Peña Ballesteros
Escuela de Ingeniería Química, Grupo de Investigaciones en Corrosión, Universidad Industrial de Santander (UIS)
Bio

DOI: https://doi.org/10.18273/revion.v28n2-2015005

Published 2015-12-30

Keywords

Nickel,
Adsorption,
Bentonite,
Clays,
Kinetic.

How to Cite

Mejía Miranda, C., Laverde, D., Avella, V., & Peña Ballesteros, D. Y. (2015). Adsorption of Ni(II) ions on pellets of benthonitic clay. Revista ION, 28(2). https://doi.org/10.18273/revion.v28n2-2015005

Abstract

The presence of metal ions in wastewater generates a toxic effect on marine ecosystems and public health. Clays are naturally occurring materials with high adsorption capacity, low cost, practical for implementation in industrial scale for the removal of metal ions. Its implementation is limited to the development of alternatives to the use of these clays on a large scale and continuous processes. Pelletizing clays can be used in fixed bed columns. In this work the kinetics of adsorption of nickel ions on a benthonitic pelletized clay was evaluated. The extrudes were prepared by wetting the clay with a solution acidified with nitric acid at 2 %v. The proportion of clay / aqueous solution volume was 2:1. The adsorption kinetics of Ni(II) a pseudo second-order model is adjusted. The kinetic constants of the fitted model were 2.792x10-3, 8.085x10-4 and 6.292x10-4 g/mg.min and reaction temperatures for 25, 45 and 60 °C, respectively. From the lineation of Arrhenius activation energy and frequency factor for the reaction of adsorption of nickel ions onto bentonite clay was determined to be 29.58 kJ/moland 507.15 g/mg.min, respectively. The magnitude of the activation energy indicates that the controlling step in the adsorption is the chemisorption of the nickel ions on the clay surface.

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