Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/4851
Title: Effect of pH, charge separation and oxygen concentration in photoelectrocatalytic systems: Active chlorine production and chlorate formation
Authors: Selçuk, Hüseyin
Anderson, M.A.
Keywords: Chlorate formation
Chlorine production
Photoanode
Photoelectrocatalytic treatment
Titanium dioxide
Anodes
Cathodes
Chlorination
Composition effects
Electrolysis
Irradiation
Nanostructured materials
Oxygen
pH effects
Photocatalysis
Separation
Charge separation
Oxygen concentration
Photocathode
Water treatment
chlorine
photochemical treatment
titanium dioxide
Abstract: In this study, photoanodic chlorine generation and chlorate formation were investigated using a nanoporous TiO2 photo-electrode under an illumination intensity of 7.4 mW/cm2 UV and biased at +1.0 V vs. SCE. Chlorine formation increased over time finally reaching a steady-state concentration of 42 mg/l in 45 min. On the other hand, chlorate formation was observed after only 5 min irradiation and increased over time. The effect of pH, oxygen concentration and charge separation on chlorine generation and chlorate formation was also investigated. Chlorine production was practically constant over a pH range of 4.0-8.0, but decreased slightly at higher pH values. Chlorate production could be detected at pH values ?7.0. A significant effect of oxygen concentration on chlorate formation was observed. Chlorate was significantly reduced under nitrogen gas. Chlorine production in the separated photoanode compartment was about 10 fold higher than that in a combined photoanode-cathode system. © 2005 Elsevier B.V. All rights reserved.
URI: https://hdl.handle.net/11499/4851
https://doi.org/10.1016/j.desal.2004.10.016
ISSN: 0011-9164
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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