ADSORPTION OF COPPER IN EXPANDED VERMICULITE: KINETICS AND EQUILIBRIUM

ADSORPTION OF COPPER IN EXPANDED VERMICULITE: KINETICS AND EQUILIBRIUM

NISHIKAWA, E.; ALMEIDA NETO, A. F.; VIEIRA, M. G. A.

Artigo:

The aim of this work was to evaluate copper adsorption on expanded vermiculite through kinetic and equilibrium studies. The kinetics of adsorption of copper into vermiculite was assessed by kinetic phenomenological models of pseudo-first order, pseudo-second-order and intra-particle diffusion models as well as a mass transfer model in the external film. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were fitted to equilibrium data. The adsorption process follows kinetic External Film Mass Transfer and Intraparticle Diffusion models, and Freundlich model describes better the system in the equilibrium. It was also verified that the process is spontaneous, endothermic and favorable. D-R model indicated that the adsorption of copper on vermiculite is a physical process.

The aim of this work was to evaluate copper adsorption on expanded vermiculite through kinetic and equilibrium studies. The kinetics of adsorption of copper into vermiculite was assessed by kinetic phenomenological models of pseudo-first order, pseudo-second-order and intra-particle diffusion models as well as a mass transfer model in the external film. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were fitted to equilibrium data. The adsorption process follows kinetic External Film Mass Transfer and Intraparticle Diffusion models, and Freundlich model describes better the system in the equilibrium. It was also verified that the process is spontaneous, endothermic and favorable. D-R model indicated that the adsorption of copper on vermiculite is a physical process.

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DOI: 10.5151/chemeng-cobeq2014-1693-18008-136988

Referências bibliográficas

• [1] ABOLLINO, o.; GIACOMINO, A.; MALANDRINO, M.; MENTASTI, E. Interaction of metal ions with montmorillonite and vermiculite. Appl Clay Sci, v.38, p. 227-236, 2008.
• [2] CHEN, J. P.; WU, S.; CHONG, K-H. Surface modification of a granular activated carbon by citric acid for enhancement of copper adsorption. Carbon, v.41, p.1979-1986, 2003.
• [3] DAVIS, J. A.; VOLESKY, B.; VIERRA, R. H. S. F., Sargassum seaweed as biosorbent for heavy metals. Water Res, v.34, no. 17, p.4270-4278, 2000.
• [4] El-BAYAA, A. A.; BADAWY, N. A.; ABD ALKHALIK, E. Effect of ionic strength on the adsorption of copper and chromium ions by vermiculite pure clay mineral. J. Hazard. Mater, v. 170, p. 1204, 2009.
• [5] EREN, E.; AFSIN, B. An investigation of Cu(II) adsorption by raw and acid-activated bentonite: A combined potentiometric, thermodynamic, XRD, IR, DTA study. J. Hazard. Mater, v.151, p.682-691, 2008.
• [6] KILISLIOGLU, A.; BILGIN, B. Thermodynamic and kinect investigation of uranium adsorption on amberlite IR-118-H resin. Appl Radiat Isotopes., v. 50, p.155-160, 2003.
• [7] MACHADO, L. C. R.; TORCHIA, C. B; LAGO, R. M., Floating photocatalysts based on TiO2 supported on high surface area exfoliated vermiculite for water decontamination., Catal. Commun., v.7, p. 538-539, 2006.
• [8] MALANDRINO, M., ABOLLINO, O., GIACOMINO, A., ACETO, M., MENTASTI, E., Adsorption of heavy metals on vermiculite: influence of pH and organic ligands. J Colloid Interf Sci., v.299, p.537-546, 2006.
• [9] NISHIKAWA, E.; NETO, A. F. A.; VIEIRA, M. G. A., Equilibrium and Thermodynamic Studies of Zinc Adsorption on Expanded Vemriculite. Adsorpt Sci Technol., v.30, 2012.
• [10] PURANIK, P. R.; MODAK, J; M.; PAKNIKAR, K. M., A comparative study of the mass transfer kinetics of metal biosorption by microbial biomass. Hydrometallurgy, v.52, p.189-197, 1999.
• [11] SEABORN, D. J.; JAMESON, G. J., Some ion exchange properties of exfoliated vermiculite. Hydrometallurgy, v.2, p.141-155, 1976.
• [12] STYLIANOU, M. A.; INGLEZAKIS, V. J.; MOUSTAKAS, K. G.; MALAMIS, S. P.; LOIZIDOU, M. D., Removal of Cu(II) in fixes bed and batch reactors using natural zeolite and exfoliated vermiculite as adsorbents. Desalination, v.215, p.133-142, 2007.
• [13] TREYBAL, R. E. Mass transfer operations. New York: McGraw Hill, 1980.
• [14] VIEIRA, M.G.A., ALMEIDA NETO, A. F., SILVA, M. G. C., CARNEIRO, C. N., MELO FILHO, A. A. Characterization and use of in natura and calcined rice husks for biosorption of heavy metals ions from aqueous effluents. Brazilian Journal of Chemical Engineering, v.29, p.619 - 634, 2012.
• [15] YRUELA, I., Copper in plants. Braz. J. of Plant Physiol., v. 17, no. 1, 2005.

Como citar:

NISHIKAWA, E.; ALMEIDA NETO, A. F. ; VIEIRA, M. G. A.; "ADSORPTION OF COPPER IN EXPANDED VERMICULITE: KINETICS AND EQUILIBRIUM", p-9069-9076. In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 23591757, DOI 10.5151/chemeng-cobeq2014-1693-18008-136988