Photocatalytic Degradation of Phenol by Thermal Titanium Dioxide Thin Layer Electrodes

Electrochemical processes in industrial effluents have been studied as a means to obtain higher efficiency in wastewater treatment. Heterogeneous photocatalysis appears as a low-cost alternative through the use of lower wattage lamps and thermal TiO 2 films. Photocatalysis became a clean process for...

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Vydáno v:	Water, air, and soil pollution Ročník 223; číslo 7; s. 3673 - 3688
Hlavní autoři:	Lopes, Paulo Renato Matos, Montagnolli, Renato Nallin, Bidoia, Ederio Dino
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Dordrecht Springer Netherlands 01.09.2012 Springer Springer Nature B.V
Témata:	analytical methods Atmospheric Protection/Air Quality Control/Air Pollution Catalysis Climate Change/Climate Change Impacts Degradation Earth and Environmental Science Efficiency Electric fields Electrochemistry Electrodes Environment Environmental monitoring Free radicals Hazardous materials Hydrogeology Hydroxyl radicals Industrial effluents Industrial wastewater lamps Organic compounds Organic contaminants Oxidation Phenol Phenolic compounds Phenols Photocatalysis Photodegradation photolysis Semiconductors Soil Science & Conservation Studies thermal degradation Thin films Titanium Titanium dioxide Toxicity Ultraviolet radiation Wastewater Wastewater treatment Water Quality/Water Pollution Water treatment Electric potential Phenol TiO Photocatalysis HPLC
ISSN:	0049-6979, 1573-2932
On-line přístup:	Získat plný text
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Popis
Shrnutí:	Electrochemical processes in industrial effluents have been studied as a means to obtain higher efficiency in wastewater treatment. Heterogeneous photocatalysis appears as a low-cost alternative through the use of lower wattage lamps and thermal TiO 2 films. Photocatalysis became a clean process for water treatment due to hydroxyl radicals generated on semiconductor surface. Such radicals are able to degrade several organic compounds. This study used different electrodes and analytical methods for degradation of phenol molecules to reduce treatment costs, improve efficiency, and identify compounds formed during the decomposition of phenolic molecules. Thermal growth of TiO 2 film was observed on the titanium electrode in rutile form. Application of an electrical potential on the Ti/TiO 2 working electrode increases efficiency in reducing concentration of phenol after photocatalytic treatment. Still, high energy radiation (UVC) showed best degradation rates in photolytic process. Different compounds formed during the degradation of phenol were also identified in the UVC–PE treatment.
Bibliografie:	SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-1 ObjectType-Feature-2 content type line 23
ISSN:	0049-6979 1573-2932
DOI:	10.1007/s11270-012-1140-6