Thermodynamic study of the adsorption of zinc in clay bentonita Bofe

Authors

  • A. L. P. Araujo Universidade Estadual de Campinas, Faculdade de Engenharia Química
  • M. C. C. Silva Universidade Estadual de Campinas, Faculdade de Engenharia Química
  • M. L. Gimenes Programa de Pós-graduação em Engenharia Química da Universidade Estadual de Maringá
  • M. A. S. D. Barros Programa de Pós-graduação em Engenharia Química da Universidade Estadual de Maringá

Keywords:

Adsorption, clay, zinc, entalpia, energy free from Gibbs.

Abstract

In this work, was evaluated the behavior of the adsorption of íons of zinc present in aqueous solution, in clay bentonita Bofe as a function of the temperature and of the concentration of the ion in the solution through the isotherms of adsorption and of your thermodynamic parameters. The parameters thermodynamic entropy variation (ΔS), entalpia variation (ΔH) and variation of the energy free from Gibbs (ΔG), they were calculated by the graph ln(Kd) versus 1/T. The isotherms of adsorption were obtained with the experimental data of balance. The models of Langmuir and Freundlich were adjusted to the experimental data and the first presented the best results. The thermodynamic tests were accomplished in the temperatures of 0, 25, 50 and 75 0C and it was verified that the process of adsorption is spontaneous and exotérmico. 

Author Biographies

A. L. P. Araujo, Universidade Estadual de Campinas, Faculdade de Engenharia Química


M. L. Gimenes, Programa de Pós-graduação em Engenharia Química da Universidade Estadual de Maringá



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How to Cite

Araujo, A. L. P., Silva, M. C. C., Gimenes, M. L., & Barros, M. A. S. D. (2011). Thermodynamic study of the adsorption of zinc in clay bentonita Bofe. Scientia Plena, 5(12). Retrieved from https://scientiaplena.emnuvens.com.br/sp/article/view/680

Issue

Vol. 5 No. 12 (2009): Dezember/Dezembro 2009

Section

Articles

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