Solar Photocatalytic Process (TiO2 and Photo-Fenton) to Detoxify Effluents from Water-washed Spray Booths
-
Santiago Palacios
and
Ana M. Amat
Abstract
Effluents from water-washed spray-booths have been treated by different solar-driven oxidative methods: TiO2, TiO2/H2O2 and the photo-Fenton process. Laboratory scale experiments carried out under simulated sunlight indicated that the photo-Fenton was the most efficient photo-treatment, followed by the TiO2/H2O2 combination. This was confirmed by preliminary solar plant experiments. Scaled-up reactions indicated that a very important decrease in COD was achieved (67%), together with significant mineralization (51%). This resulted in an important oxidation of organics as shown by the increase of average oxidation state (AOS) and carbon oxidation state (COS) during the treatment. Conductivity suffered some increase and surface tension reached values close to that of water. The treatment also resulted in an important detoxification of the solution, as shown by V. fischeri bioassays (from initial values above 60% to fall below 10%), and a concomitant increase in biodegradability, indicated by the BOD5/COD ratio, which was above 0.9 at the end of the treatment. Finally, GC-MS analyses showed important removal of the solvents detected.
© 2016 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- The Kinetics of Semiconductor Photocatalysis in Activity-Indicator Films
- Degradation of n-Butyl tin Chlorides in Waters. A Comparative Assessment of the Process by Photo-assisted and Chemical- treatment Methods
- Comparison of Emerging NSAID Pollutants Degradation in Aqueous Media by O3/UV-VIS Processes
- Liquid Phase Epoxidation of Allylic Compounds with Hydrogen Peroxide at Autogenic and Atmospheric Pressure over Mesoporous Ti- MCM-48 Catalyst
- Scope of Metal Loaded Microporous Zeolite-Y as Catalyst in Ozone Initiated Oxidation of n-hexadecane
- Solar Photocatalytic Process (TiO2 and Photo-Fenton) to Detoxify Effluents from Water-washed Spray Booths
- Detailed Investigation on the Effect of Washing TiO2 Prepared from Tisalts Flocculated Wastewater Sludge
- Synthesis, Characterization and Photocatalytic Activity of Ag-doped TiO2 Film
- Degradation of Pesticide by Photocatalytic Ozonation Process and Study of Synergistic Effect by Comparison with Photocatalysis and UV/Ozonation Processes
- Reactivity of Peroxyl Radicals towards Hydrogen Donors: A Kinetic ESR Investigation
- Removal of SO2 by Gas-Phase Oxidation Using DBD Micro-gap Discharge Plasma
- Hydrothermal Preparation and Photocatalytic Performance of (I2)n Sensitized and I(V) Doped TiO2 Supported on SiO2
- Photocatalytic Mineralization of Azo Dyes Using Nanostructure ZnO Thin Film Coated on Glass Bead
- Removal of NO2 Produced by Corona Discharge in Indoor Air Cleaning
- Degradation of Bisphenol-A by Ozonation
- Phenolic Acids Ozonation: QSAR Analysis and pH Influence on the Selectivity of Ozone
- Integrated Strategy for Treatment of Winery Wastewaters Using Flocculation, Ozonation and Fenton’s Oxidation
- Photocatalytic Degradation of Tetracycline Hydrochloride in Aqueous Solution at Ambient Conditions Stimulated by Gold Containing Zinc- Titanium Oxide Films
