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Journal of Materials Science

, Volume 43, Issue 21, pp 6986–6991 | Cite as

Adsorption of cholate anions on layered double hydroxides: effects of temperature, ionic strength and pH

  • J. F. Naime Filho
  • F. Silvério
  • M. J. dos Reis
  • J. B. Valim
Article

Abstract

Layered Double Hydroxides are a class of materials that can be described as positively charged planar layers consisting of divalent and trivalent cations in the center of edge-sharing octahedra. The positive charge in the LDH layers must be compensated by anion intercalation. These materials have applications that include adsorption and/or sorption of anionic species. Cholic acid is one of the main acids produced by the liver. It promotes transport of lipids through aqueous systems. This work reports on the adsorption of Cholic acid anions in MgAl–CO3–LDH taking ionic strength, pH, and temperature effects into account. The adsorbent was characterized by different techniques. Cholate anion adsorption was performed at two different temperatures (298 and 323 K), two different ionic strength conditions (0.0 and 0.1 M of NaCl), and two different pH values (7.0 and 10.0). The results show that the sorption of Cholate anions in calcined LDH can remove a considerable amount of these anions from the medium. Cholate anion adsorption in the LDH with no calcining also occurs, but at a lower amount.

Keywords

High Performance Liquid Chromatography Layered Double Hydroxide Cholic Acid Trivalent Cation PXRD Pattern 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • J. F. Naime Filho
    • 1
  • F. Silvério
    • 1
  • M. J. dos Reis
    • 1
  • J. B. Valim
    • 1
  1. 1.Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão PretoUniversidade de São PauloRibeirao PretoBrazil

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