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
Compressed Earth Blocks (CEB) with bitumen emulsion
Walls made of soil present serious failures due to their exposure to rain and groundwater. In addition, due to their hygroscopic characteristics, compressed earth blocks (CEBs) present low r...
Integrated generation- transmission expansion planning: a review of the state of the art
In the last decade a great number of research works have approached the power systems planning problem by coordinating in a single optimization problem the generation expansion planning (GEP) and the transmission expansi...
CO, Pb++ and SO2 effects on L-type calcium channel and action potential in human atrial myocytes. In silico study
Exposure to air pollutants like carbon monoxide (CO), lead (Pb++) and sulfur dioxide (SO2) promotes the occurrence of cardiovascular diseases. Experimental studies have shown that CO, Pb++and SO2block L-t...
Determination of Uncertainty in Measuring Instruments in Electrical Engineering Programs
When electrical engineering students start their instrumentation and measurement course, they have previously taken calculus, physics, probability, and statistics. However, they have problems to apply the knowledge they...
Model for automatic detection of lexical-syntactic errors in texts written in Spanish
Evaluating written texts is a task that mainly considers two aspects: syntacticsand semantics. The first one focuses on the form of the text,and the second one,on itsmeaning. Conducting this task manually implies...