Photocatalytic and photoelectrocatalytic humic acid removal and selectivity of TiO2 coated photoanode

In this study, photocatalytic (PC) and photoelectrocatalytic (PEC) treatment methods were comparatively investigated as a possible means of removing humic acid (HA) following absorbance at 254 nm (UV254) and total organic carbon (TOC) analysis. The enhanced HA degradation rates were obtained in the...

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Bibliographic Details
Main Authors: Selçuk, Hüseyin, Bekbolet, M.
Format: Article in Journal/Newspaper
Language:English
Published: 2008
Subjects:
Chlorine generation
Humic acid
Photocatalytic treatment
Photoelectrocatalytic treatment
Selectivity
Titanium dioxide
Organic acids
Biological materials
carbonic acid
chlorine
alkaline environment
electrode
experimental study
oxidation
pH
photodegradation
pollutant removal
total organic carbon
acidity
alkalinity
article
degradation
film
photocatalysis
ultraviolet spectroscopy
waste component removal
Catalysis
Humic Substances
Hydrogen-Ion Concentration
Photochemistry
Titanium
Waste Disposal
Fluid
Water Pollutants
Water Purification
Carbonic acid
Online Access:http://acikerisim.pau.edu.tr:8080/xmlui/handle/11499/7047
Description
Summary:In this study, photocatalytic (PC) and photoelectrocatalytic (PEC) treatment methods were comparatively investigated as a possible means of removing humic acid (HA) following absorbance at 254 nm (UV254) and total organic carbon (TOC) analysis. The enhanced HA degradation rates were obtained in the PEC system over the conventional PC process under acidic, neutral and alkaline conditions. Preliminary and binary experiments were performed to determine the selectivity of the photoanode in terms of HA and chloride oxidation. TOC, chlorine and photocurrent parameters proved that HA was selectively removed before chlorine generation. The inhibitory effect of carbonate ions on the performance of photoanode was also studied under different pH values. © 2008 Elsevier Ltd. All rights reserved.

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