Hydrophobicity study of kaolinite from La Unión, Antioquia

  • Liliana M. Usuga-Manco Universidad Nacional de Colombia, Medellín
  • Alejandro López-Valdivieso Universidad Autónoma de San Luis Potosí, San Luis Potosí-México
  • Moisés O. Bustamante-Rúa Universidad Nacional de Colombia, Medellín
Keywords: Contact angle, kaolinite, oleic acid, sodium dodecyl sulfate, hydrophobic.

Abstract

In this research three methodologies to convert the hydrophilic surface of kaolinite into a hydrophobic surface are proposed, this condition is required to recover this mineral by means of froth flotation. Taking into account the anisotropy, zeta potential and complex surface electrical properties of the kaolinite, three surface chemical treatments based on the interacting and absorption of anionic collectors onto the mineral surface, causing an increase in the contact angle and thus increased hydrophobicity of kaolinite were applied. The methodologies proposed were interactions of kaolinite particles with: sodium dodecyl sulfate solutions with concentration 1x10-3M, 1x10-4M, 1x10-5M; sodium dodecyl sulfate solutions 1x10-3M, 1x10-4M, 1x10-5M with further interaction with kerosene solutions 127000 ppm; and oleic acid solutions 1x10-3M, 1x10-4M, 1x10-5M, each one with a five minutes of interaction. The experimental results obtained by zeta potential and contact angle of the kaolinite before and after applying chemical treatments indicate that larger the chain length of the collector and its concentration, bigger the contact angle and so, more hydrophobic the surface (edge or face). In order to optimize, control and understand this solid-liquid interaction phenomenon is suggested to find out about the hydrophobization mechanism of kaolinite with oleic acid and its percentage of hydrophobization.

Author Biographies

Liliana M. Usuga-Manco, Universidad Nacional de Colombia, Medellín
Ph.D.(c) en Ingeniería - Ciencia y Tecnología de Materiales, Departamento de Materiales y Minerales, Facultad de Minas, Universidad Nacional de Colombia, Medellín-Colombia
Alejandro López-Valdivieso, Universidad Autónoma de San Luis Potosí, San Luis Potosí-México
Ph.D. en Ciencias de Materiales e Ingeniería de Minerales, Facultad de Ingeniería, Instituto de Metalurgia Universidad Autónoma de San Luis Potosí, San Luis Potosí-México
Moisés O. Bustamante-Rúa, Universidad Nacional de Colombia, Medellín
Ph.D. en Ciencias de la Ingeniería, Departamento de Materiales y Minerales, Facultad de Minas, Universidad Nacional de Colombia, Medellín-Colombia
How to Cite
Usuga-Manco, L. M., López-Valdivieso, A., & Bustamante-Rúa, M. O. (2015). Hydrophobicity study of kaolinite from La Unión, Antioquia. TecnoLógicas, 18(35), 71-81. https://doi.org/10.22430/22565337.184

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Published
2015-08-03
Section
Research Papers