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

Abstract

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.

Electrochemical degradation of DCF by boron-doped diamond anode: degradation mechanism, pathways and influencing factors

“…This phenomenon has also been found in many electrochemical degradation processes of losartan (Salazar et al 2016), sulfamethazine (Barhoumi et al 2016;Sopaj et al 2016), ifosfamide (Fabianśka et al 2015) and nitrobenzene (Rabaaoui et al 2013). The increase of current density resulted in a higher concentration of •OH in the bulk solution (Komtchou et al 2017). In addition, the BDD anode can extend the range of current densities and significantly raise the most optimal current density compared to Pt and DSA anodes based on its very high O 2 evolution over potential and weak adsorption of BDD(•OH) (Sopaj et al 2016).…”

“…Ahn et al (2017) experimentally determined the rate constants NOM affects the oxidation reaction based on radicals through scavenging radicals and reversing the radicals intermediates to the parent compound (Lutze et al 2015;Feng et al 2017). Komtchou et al (2017) also found the HA competed with the containment and its by-products during water treatment. Thus, the inhibited degradation of DCF was expected in this study.…”

Electrochemical Abatement of Atrazine Solutions Using an Undivided Stirred Tank Cell with Pt or BDD Anode

“…5c). These results point to the raising initial generation of products in the order: desethyl desisopropyl atrazine < cyanuric acid < desethyl atrazine [18].…”

Molecular imprinted membrane biosensor for pesticide detection: Perspectives and challenges

“…Komtchou et al proposed the use of an electrochemically advanced oxidation process from water sample in the elimination of atrazine and its by-products. 27 It was primarily focused on the degradation of atrazine and its by-products using electrochemically advanced oxidation processes, such as anodic-oxidation with simultaneous H 2 O 2 formation (AO-H 2 O 2 ), electro-Fenton (EF), and photoelectro-Fenton (PEF). By comparing these three reactions route, the PEF method was found to be the most effective process for the degradation of atrazine and its byproducts.…”