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

Related Articles

Programming by demonstration of the sequence of tightening a nut allowing variations in tool position

A technique of programming by demonstration of a robot is proposed. Such a technique allows that a robot execute sequential or complex tasks. It uses a combination of Petri nets and task parameterized Gaussian mixture mo...

Secondary voltage regulation based on average voltage control

Thispaper compares a conventional Secondary Voltage Regulation (SVR) scheme based on pilot nodes witha proposed SVR thattakes into account average voltages of control zones. Voltage control significance for the...

Treatment of laboratory wastes by heterogeneous photocatalysis with TiO2

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 s...

Copper alloy coatings manufactured by oxy-fuel thermal spray onto a porcelain substrate

A coated system consisting of a ceramic substrate and a coating of a copper alloy was developed in order to provide electrically conductive properties to specific surface of the substrate. The coatings were elaborated by...

Changes in the bioactive compounds of pasteurized gooseberry (Physalis peruviana L.) juice

The worldwide market of fruit drinks is interested in exotic juices with high nutritional value, and part of that demand can be satisfied with gooseberry derivatives. Therefore, the objective of this study was to evaluat...

Download PDF file
  • EP ID EP336629
  • DOI 10.22430/22565337.787
  • Views 153
  • Downloads 0

How To Cite

Carlos F. Granda-Ramírez, Gina M. Hincapié-Mejía, Stephanía Lopera-Uribe (2018). Treatment of laboratory wastes by heterogeneous photocatalysis with TiO2. TecnoLógicas, 21(42), 187-197. https://europub.co.uk/articles/-A-336629