Degradation of atrazine in aqueous solution with electrophotocatalytic process using TiO2−x photoanode

Komtchou, Simon; Dirany, Ahmad; Drogui, Patrick; Delegan, Nazar; Khakani, My Alì El; Robert, Didier; Lafrance, Pierre

doi:10.1016/j.chemosphere.2016.05.022

Cited by 39 publications

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“…Among many AOPs, photoelectrocatalysis is an emerging and promising hybrid AOP [2]. This technology provides synergistic benefits from the interaction between photocatalytic and electrocatalytic processes [3,4]. Similar to photocatalysis, photoelectrocatalysis relies on semiconductor materials to photo-generate charge carriers according to Equation (1); applying a constant voltage across semiconductors supported on solid surfaces prevents recombination within the material [5,6].…”

Section: Introductionmentioning

confidence: 99%

Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen

Montenegro-Ayo

Morales-Gomero

Alarcón

et al. 2019

Water

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Multiple discs coated with hierarchically-organized TiO2 anatase nanotubes served as photoelectrodes in a novel annular photoelectrocatalytic reactor. Electrochemical characterization showed light irradiation enhanced the current response due to photogeneration of charge carriers. The pharmaceutical acetaminophen was used as a representative water micropollutant. The photoelectrocatalysis pseudo-first-order rate constant for acetaminophen was seven orders of magnitude greater than electrocatalytic treatment. Compared against photocatalysis alone, our photoelectrocatalytic reactor at <8 V reduced by two fold, the electric energy per order (EEO; kWh m−3 order−1 for 90% pollutant degradation). Applying a cell potential higher than 8 V detrimentally increased EEO. Acetaminophen was degraded across a range of initial concentrations, but absorbance at higher concentration diminished photon transport, resulting in higher EEO. Extended photoelectrocatalytic reactor operation degraded acetaminophen, which was accompanied by 53% mineralization based upon total organic carbon measurements. This proof of concept for our photoelectrocatalytic reactor demonstrated a strategy to increase photo-active surface area in annular reactors.

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Section: Introductionmentioning

confidence: 99%

Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen

Montenegro-Ayo

Morales-Gomero

Alarcón

et al. 2019

Water

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“…Therefore, the possible 524 pathways of ATZ degradation by hydroxyl radicals appears to be similar to those proposed by 525 Komtchou et al (2016b) using electrophotocatalytic process. 526…”

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confidence: 50%

Removal of atrazine and its by-products from water using electrochemical advanced oxidation processes

et al. 2017

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Please cite this article as: Komtchou, S., Dirany, A., Drogui, P., Robert, D., Lafrance, P., Removal of atrazine and its by-products from water using electrochemical advanced oxidation processes, Water Research (2017Research ( ), doi: 10.1016Research ( /j.watres.2017 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. important by-product recorded. More than 99% of ATZ oxidation was recorded after 15 min of 37 treatment and all the concentrations of major by-products were less than the limit of detection 38 after 45 min of treatment. The PEF process was also tested for real surface water contaminated by 39 ATZ: i) with and without addition of iron; ii) without pH adjustment (pH ∼ 6.7) and with pH 40 adjustment (pH ∼3.1). In spite of the presence of radical scavenger and iron complexation the 41 PEF process was more effective to remove ATZ from real surface water when the pH value was 42 adjusted near to 3.0. The ATZ removal was 96.0% with 0.01 mM of iron (k app = 0.13 min Highlights• PEF process is a feasible technology for the treatment of water contaminated by ATZ. 47• More than 99% of ATZ oxidation was recorded after 15 min of treatment in synthetic effluent. 48• Atrazine-desethyl-desisopropyl (DEDIA) was the most important by-product recorded.

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“…5 Numerous technologies have been developed to remove ATZ, including biological treatment, physical absorption, and chemical oxidation. [6][7][8][9][10] Among these, chemical degradation has been generally recognized as a promising and decisive step.…”

Section: Introductionmentioning

confidence: 99%

Factors affecting formation of deethyl and deisopropyl products from atrazine degradation in UV/H₂O₂ and UV/PDS

et al. 2017

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Degradation of atrazine in aqueous solution with electrophotocatalytic process using TiO2−x photoanode

Cited by 39 publications

References 39 publications

Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen

Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen

Removal of atrazine and its by-products from water using electrochemical advanced oxidation processes

Factors affecting formation of deethyl and deisopropyl products from atrazine degradation in UV/H₂O₂ and UV/PDS

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Degradation of atrazine in aqueous solution with electrophotocatalytic process using TiO2−x photoanode

Cited by 39 publications

References 39 publications

Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen

Scaling up Photoelectrocatalytic Reactors: A TiO2 Nanotube-Coated Disc Compound Reactor Effectively Degrades Acetaminophen

Removal of atrazine and its by-products from water using electrochemical advanced oxidation processes

Factors affecting formation of deethyl and deisopropyl products from atrazine degradation in UV/H2O2 and UV/PDS

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Factors affecting formation of deethyl and deisopropyl products from atrazine degradation in UV/H₂O₂ and UV/PDS