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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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