Treatment of laboratory wastes by heterogeneous photocatalysis with TiO2
Journal Title: TecnoLógicas - Year 2018, Vol 21, Issue 42
Abstract
Environmental pollution caused by hazardous waste is a growing and globalized prob-lem. Suchwaste, once emitted, can remain in the environment for hundreds of years. Chem-ical substances are handled and several operations are carried out in differentuniversitylaboratories,which generates waste that in most cases is dangerous to human health and the environment.Some of these residues include those producedduring Gram stainingpro-cedures.This paperpresentsan alternative for treating residues of Gram staining by Heteroge-neous Photocatalysis (HP). Evonik® TiO2P-25 was used,and the radiation source was a germicidal lamp.In addition, UV-Vis spectroscopytogether with COD measurementswere used as analytical techniques.In view of the nature of these residues, it was decidedto treat them in concentrations lower than real ones (diluted to 10 %), with TiO2dosages according to the literature ondy-ing processes. Within 2 hours,a degradation of around 70 % and a reduction of 40 %of the CODwere achieved, which shows the feasibility of the implementation of this process toeliminate saidwastes.
Authors and Affiliations
Carlos F. Granda-Ramírez, Gina M. Hincapié-Mejía, Stephanía Lopera-Uribe
Keywords
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- EP ID EP336629
- DOI 10.22430/22565337.787
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