Resumen

MUESES, Miguel A.  y  MACHUCA-MARTINEZ, Fiderman. Molecular adsorption model for organic compounds over TiO2 - P25 by protonic distribution affinity. Ing. compet. [online]. 2013, vol.15, n.2, pp.201-209. ISSN 0123-3033.

A predictive molecular adsorption model for organic compounds over TiO2-P25 particles was formulated. The model is an extension of a theoretical method of surface characterization called Protonic Distribution Affinity (PDA), which is obtained from potentiometric titration analysis, zero point charge (ZPC) of the material and adsorption isotherms of the Langmuir-Hinshelwood type. The chemical nature of the compound in the model was established by initial pH and molecular weigh. We found that, for the TiO2-P25, the ZPC was 6.8. The model was validated using experimental data of dichloroacetic acid (DCA), 4-chlorophenol (4-CP) and phenol (PH) to different conditions. The model has high predictive capacity, numerical stability and sturdiness for obtaining the solutions. For available experimental data, the correlation coefficient was 0.97

Palabras clave : Photocatalysis; protonic distribution affinity; Langmuir-Hinshelwood isotherm; potentiometric titration.

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