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Degradation of Orange G by UV/TiO2/IO4 ‾process: Effect of operational parameters and estimation of electrical energy consumption

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Title Degradation of Orange G by UV/TiO2/IO4 ‾process: Effect of operational parameters and estimation of electrical energy consumption
 
Creator Chamekh, Hayet
Chiha, Mahdi
Ahmedchekkat, Fatiha
Souames, Nour El Houda
 
Subject Energy consumption
Hybrid advanced oxidation process
Hydroxyl radicals
Iodate radicals
Orange G
Periodate
 
Description 293-307
In the present study, the degradation of an azo dye Orange G (OG) by the UV/TiO2/periodate (IO4‾) process has been
investigated. OG was totally disappears within 10 min by the UV/TiO2/IO4‾compared to UV alone, UV/TiO2 or UV/IO4‾. A
synergistic effect has been obtained when combining the UV/TiO2 and the UV/IO4‾systems, resulting in positive interactions
between both processes. Experiments conducted with specific hydroxyl radical scavengers, show that despite the inhibition
effect observed, complete degradation has been achieved beyond 10 min, demonstrating that the degradation is not only
initiated by hydroxyl radical, but also by other reactive entities; the involvement of iodate radical is confirmed with the use
of chromium species as a competitor with periodate ions for the photogenerated electron at the conduction band. The
operating parameters influencing the degradation process such as initial dye concentration, initial periodate concentration,
light intensity/wavelength and initial pH solution have been explored. The presence of inorganic ions such as chloride,
bromide, sulphate, carbonate and bicarbonate ions in the irradiated solution show reverse effects depending on the
concentration used. The OG degradation in different water matrices is found to be sensitive to the presence of different
species and their nature. Chemical oxygen demand (COD) has been partially removed after 10 min of treatment, and then
this COD abatement stabilized, indicating the strength of the by-products from dye degradation by the UV/TiO2/IO4‾ system
during the treatment time. The electrical energy consumption is estimated at 2.21kWhm‾3/Order. The results obtained
indicate that the UV/TiO2/IO4‾ process could be used as a hybrid process to the treatment of dye contaminated water.
 
Date 2023-05-04T11:37:55Z
2023-05-04T11:37:55Z
2023-05
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/61852
https://doi.org/10.56042/ijct.v30i3.62814
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.30(3) [May 2023]