Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/4671
Title: Bromate formation on the non-porous TiO2 photoanode in the photoelectrocatalytic system
Authors: Selçuk, Hüseyin
Sarikaya, H.Z.
Bekbolet, M.
Anderson, M.A.
Keywords: Bromate formation
Bromine generation
By-product
Photoanode
Photoelectrocatalytic
Titanium dioxide
Anodes
Bromine
Catalysis
bromate
bromine
sodium bromide
titanium dioxide
photochemistry
article
chemical analysis
chemical reaction
concentration (parameters)
electrode
electrolysis
illumination
irradiation
pH
photocatalysis
porosity
steady state
Bromates
Disinfection
Electrochemistry
Electrodes
Electrolysis
Hydrogen-Ion Concentration
Ozone
Photochemistry
Titanium
Water
Abstract: The increasing use of ozone in water disinfection processes has been the focus of considerable concern in regards to inorganic disinfection by product formation of bromate in waters containing bromide. Due to the public health risk caused by the presence of bromate as a suspected carcinogen, attention had been addressed to the conditions under which bromate is formed. In this study, photoanodic bromine generation and bromate (BrO3-) formation were investigated using a TiO2 electrode in a photoelectrocatalytic (PEC) treatment process. The separation of anodic and cathodic reactions in the PEC system resulted in a pH decrease from 9.3 to 3.0 in the photoanode compartment and an increase to 11.0 in the cathode compartment. Under a photo-illumination intensity of 5.7 mW cm-2 UV, a biasing potential of +1.0 V vs SCE, a pH of 6.0 and at a NaBr concentration of 1.0 × 10-2 M, active bromine formation increased over time with 2.4 × 10-6 M min-6 rate and reached a steady-state concentration of 1.44 × 10-4 M in 60 min. Bromate formation was detected after a lag-period of 15 min and exhibited a continuous increasing trend with respect to irradiation time. No bromate formation was observed below pH 6.5 whereas an increasing bromate concentrations and pH up to pH = 8.5 were noted. © 2005 Elsevier Ltd. All rights reserved.
URI: https://hdl.handle.net/11499/4671
https://doi.org/10.1016/j.chemosphere.2005.04.086
ISSN: 0045-6535
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Show full item record



CORE Recommender

SCOPUSTM   
Citations

24
checked on Oct 13, 2024

WEB OF SCIENCETM
Citations

22
checked on Oct 14, 2024

Page view(s)

48
checked on Aug 24, 2024

Google ScholarTM

Check




Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.