Photocatalytic degradation of formaldehyde containing wastewater from veterinarian laboratories.
The photocatalytic destruction of methanol, formaline (mixture of formaldehyde, methanol and water) and formaline wastes from the preservation of vertinarian physiologic samples has been attempted by two different processes, at high concentrations of reagents and by dossification of reagents, varying pH in both. Experiment evolution has been monitored by measuring the organic matter such as TOC and formaldehyde concentrations [H2CO]. Also, methanol and methanol-formaldehyde interactions with the TiO2 surface have been analysed by FTIR spectroscopy. Results indicate that at high concentrations the catalyst surfacial alterations given by methoxy, formates or carbonates, according to the pH of the sample can profoundly affect catalyst behaviour. It has been established that reagent dossification is advantageous for enhancing photonic efficiency as it minimizes the adsorbate presence that hampers the photocatalytic process.
Araña
J
J
Photocatalysis and Electrochemical Laboratory, Parque Científico y Tecnológico, Universidad de Las Palmas de Gran Canaria, Tafira Campus, E-35017 Las Palmas de Gran Canaria, Spain. jaranaesp@hotmail.com
Martínez Nieto
J L
JL
Herrera Melián
J A
JA
Doña Rodríguez
J M
JM
González Díaz
O
O
Pérez Peña
J
J
Bergasa
O
O
Alvarez
C
C
Méndez
J
J
D002244:Carbon; D002384:Catalysis; D005557:Formaldehyde / Q000737:chemistry* / Q000528:radiation effects; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008506:Medical Waste / Q000032:analysis*; D000432:Methanol; D010782:Photolysis / Q000528:radiation effects*; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000032:analysis*
D008506:Medical Waste; D014874:Water Pollutants, Chemical; D005557:Formaldehyde; D002244:Carbon; D000432:Methanol