Application of the solution-diffusion model for the removal of atrazine using a nanofiltration membrane

  • A. M. Hidalgo /
  • G. León /
  • M. Gómez /
  • M. D. Murcia /
  • D. S. Barbosa /
  • P. Blanco
Journal ar
Desalination and Water Treatment
  • Volumen: 51
  • Número: 10-12
  • Fecha: 01 enero 2013
  • Páginas: 2244-2252
  • ISSN: 19443986 19443994
  • Tipo de fuente: Revista
  • DOI: 10.1080/19443994.2012.734720
  • Tipo de documento: Artículo
  • Editorial: Taylor and Francis Inc. 325 Chestnut St, Suite 800 Philadelphia PA 19106
The solution-diffusion model was used to predict the behaviour of four nanofiltration membranes, two were made of polyamide (NF-99 and NF-97) and the other two were made of polypiperazineamide (DL and DK), when used for the removal of atrazine from aqueous solutions. The mass transfer model applied is very simple and its linearization facilitates rapid calculation of the relevant parameters. The two main parameters, permeate concentration and volumetric permeate flux, are obtained from three different coefficients: water permeability, Aw, solute permeability, Bs, and osmotic pressure coefficients, ¿. Good agreement between the experimental and the predicted atrazine concentrations was obtained for the NF-99, DL and DK membranes when the concentration was low. However, only the NF-99 membrane provided accurate values for the two main parameters in the whole range of concentrations studied, which suggests that the solution-diffusion model can only be applied to this membrane. © 2013 Balaban Desalination Publications.

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