"Photocatalytic oxidation of cyanide"

Authors

  • Edison Gil Pavas Universidad EAFIT
  • Universidad EAFIT. Grupo de investigación procesos ambientales y biotecnológicos. –GIPAB- Universidad EAFIT

Keywords:

Photo-oxidation, Cyanide, Galvanized, Wastewater

Abstract

The behavior of cyanide concentration in a wastewater of galvanized process of metalic recover industry was studied. The photodegradation process with Artificial UV light, titanium oxide (TiO2) as catalyst and hydrogen peroxide was used to degrade this waste water (400 ppm of CN-). The cyanide concentration was determined with electrode ion-selective method.
In this study a annular shaped reactor with concentric tubes was used in laboratory scale. It was obtained cyanide reduction in 65.5% with two hours of recirculation time. Kinetic models just was Langmuir-Hinshelwood. Experiments with four hours of recirculation time and reinyection of peroxide hydrogen was made. It was obtained a 97.37 % of reduction of cyanide concentration. Experiments with addition of oxygen didn´t improved the cyanide reduction. It was performed with two hours of recirculation time with reduction of 65.5% of cyanide.

Author Biography

  • Edison Gil Pavas, Universidad EAFIT
    M.Sc En Ingeniería Química. Ingeniero Químico de la Universidad de Antioquia, Magíster en Ingeniería Química de la Universidad Nacional, Sede Bogotá. Director del Grupo de Investigación en Procesos Ambientales y Biotecnológicos (GIPAB) de la Universidad EAFIT. Reconocido por COLCIENCIAS. Docente Investigador, Departamento de Ingeniería de Procesos, Universidad EAFIT, además ha sido profesor de la Universidad de Antioquia en el departamento de Ingeniería Química y en la Escuela de Ingeniería de Antioquia. Área de desempeño: Procesos Avanzados de Oxidación. Asignaturas que imparte: Transferencia de Calor y Transferencia de masa.

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Published

2012-08-02

Issue

No. 29 (2005): “Oxidación fotocatalítica de cianuro”

Section

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