Treatment of laboratory wastes by heterogeneous photocatalysis with TiO2

  • Carlos F. Granda-Ramírez Institución Universitaria Colegio Mayor de Antioquia
  • Gina M. Hincapié-Mejía Institución Universitaria Colegio Mayor de Antioquia
  • Stephanía Lopera-Uribe Institución Universitaria Colegio Mayor de Antioquia
Keywords: Gram staining, Heterogeneous Photocatalysis, Hazardous waste, titanium dioxide

Abstract

Environmental pollution caused by hazardous waste is a growing and globalized prob-lem. Such waste, once emitted, can remain in the environment for hundreds of years. Chem-ical substances are handled and several operations are carried out in different university laboratories, which generates waste that in most cases is dangerous to human health and the environment. Some of these residues include those produced during Gram staining pro-cedures.
This paper presents an alternative for treating residues of Gram staining by Heteroge-neous Photocatalysis (HP). Evonik® TiO2 P-25 was used, and the radiation source was a germicidal lamp. In addition, UV-Vis spectroscopy together with COD measurements were used as analytical techniques.
In view of the nature of these residues, it was decided to treat them in concentrations lower than real ones (diluted to 10 %), with TiO2 dosages according to the literature on dy-ing processes. Within 2 hours, a degradation of around 70 % and a reduction of 40 % of the COD were achieved, which shows the feasibility of the implementation of this process to eliminate said wastes.

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Author Biographies

Carlos F. Granda-Ramírez, Institución Universitaria Colegio Mayor de Antioquia

PhD en Ingeniería, Ingeniero Químico, Grupo de investigación Ambiente, Hábitat y Sostenibilidad, Facultad de Arquitectura e Ingeniería

Gina M. Hincapié-Mejía, Institución Universitaria Colegio Mayor de Antioquia

PhD en Ingeniería, MSc en Ingeniería, Ingeniera Química, Grupo de investigación Ambiente, Hábitat y Sostenibilidad, Facultad de Arquitectura e Ingeniería

Stephanía Lopera-Uribe, Institución Universitaria Colegio Mayor de Antioquia

Estudiante de Ingeniería Ambiental, Facultad de Arquitectura e Ingeniería

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How to Cite
Granda-Ramírez, C., Hincapié-Mejía, G., & Lopera-Uribe, S. (2018, May 14). Treatment of laboratory wastes by heterogeneous photocatalysis with TiO2. TecnoLógicas, 21(42), 187-197. https://doi.org/10.22430/22565337.787
Published
2018-05-14
Section
Research Papers