Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton

This work explores the feasibility of visible LEDs (λ: 400–800 nm) used in photo-Fenton for the degradation of a 50 mg/L cyclohexanecarboxylic acid (CHA) as model naphthenic acid present in process wastewater from the oil sands industry. The influence of initial pH, catalyst concentration and iron o...

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Autores principales:	Alicia L. Garcia-Costa, Lucia Lopez-Perela, Gema Pliego, Juan A. Zazo, Jose A. Casas
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Naphthenic acids Advanced oxidation Process intensification Wastewater treatment Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/61379b989ad74ad49ad9263dc3a7333a
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spelling	oai:doaj.org-article:61379b989ad74ad49ad9263dc3a7333a2021-11-12T04:49:05ZEffective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton2666-821110.1016/j.ceja.2021.100198https://doaj.org/article/61379b989ad74ad49ad9263dc3a7333a2022-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121001137https://doaj.org/toc/2666-8211This work explores the feasibility of visible LEDs (λ: 400–800 nm) used in photo-Fenton for the degradation of a 50 mg/L cyclohexanecarboxylic acid (CHA) as model naphthenic acid present in process wastewater from the oil sands industry. The influence of initial pH, catalyst concentration and iron oxidation state, H2O2 dose and radiant flux were studied. In all trials, an initial lag phase in both the H2O2 decomposition and TOC evolution was observed. This seems to be related to the generation of a complex between CHA, hydrogen peroxide and iron (CHA-H2O2-Fe). This iron scavenging decreases the H2O2 decomposition rate, leading to a lagged mineralization kinetics. Nonetheless, process intensification using visible radiation (λmax: 460 nm) favors the CHA-H2O2-Fe photoactivation and breakdown when using an H2O2 concentration higher than 33% of the stoichiometric dose for complete CHA mineralization. Under the optimum conditions pH0 3, Φ: 280 W/m2, Fe2+:20 mg/L and H2O2: 144 mg/L, which corresponds to 60% of the stoichiometric amount, 75% of TOC removal was achieved.Alicia L. Garcia-CostaLucia Lopez-PerelaGema PliegoJuan A. ZazoJose A. CasasElsevierarticleNaphthenic acidsAdvanced oxidationProcess intensificationWastewater treatmentChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 9, Iss , Pp 100198- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Naphthenic acids Advanced oxidation Process intensification Wastewater treatment Chemical engineering TP155-156
spellingShingle	Naphthenic acids Advanced oxidation Process intensification Wastewater treatment Chemical engineering TP155-156 Alicia L. Garcia-Costa Lucia Lopez-Perela Gema Pliego Juan A. Zazo Jose A. Casas Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton
description	This work explores the feasibility of visible LEDs (λ: 400–800 nm) used in photo-Fenton for the degradation of a 50 mg/L cyclohexanecarboxylic acid (CHA) as model naphthenic acid present in process wastewater from the oil sands industry. The influence of initial pH, catalyst concentration and iron oxidation state, H2O2 dose and radiant flux were studied. In all trials, an initial lag phase in both the H2O2 decomposition and TOC evolution was observed. This seems to be related to the generation of a complex between CHA, hydrogen peroxide and iron (CHA-H2O2-Fe). This iron scavenging decreases the H2O2 decomposition rate, leading to a lagged mineralization kinetics. Nonetheless, process intensification using visible radiation (λmax: 460 nm) favors the CHA-H2O2-Fe photoactivation and breakdown when using an H2O2 concentration higher than 33% of the stoichiometric dose for complete CHA mineralization. Under the optimum conditions pH0 3, Φ: 280 W/m2, Fe2+:20 mg/L and H2O2: 144 mg/L, which corresponds to 60% of the stoichiometric amount, 75% of TOC removal was achieved.
format	article
author	Alicia L. Garcia-Costa Lucia Lopez-Perela Gema Pliego Juan A. Zazo Jose A. Casas
author_facet	Alicia L. Garcia-Costa Lucia Lopez-Perela Gema Pliego Juan A. Zazo Jose A. Casas
author_sort	Alicia L. Garcia-Costa
title	Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton
title_short	Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton
title_full	Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton
title_fullStr	Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton
title_full_unstemmed	Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton
title_sort	effective degradation of cyclohexanecarboxylic acid by visible led driven photo-fenton
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/61379b989ad74ad49ad9263dc3a7333a
work_keys_str_mv	AT alicialgarciacosta effectivedegradationofcyclohexanecarboxylicacidbyvisibleleddrivenphotofenton AT lucialopezperela effectivedegradationofcyclohexanecarboxylicacidbyvisibleleddrivenphotofenton AT gemapliego effectivedegradationofcyclohexanecarboxylicacidbyvisibleleddrivenphotofenton AT juanazazo effectivedegradationofcyclohexanecarboxylicacidbyvisibleleddrivenphotofenton AT joseacasas effectivedegradationofcyclohexanecarboxylicacidbyvisibleleddrivenphotofenton
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Effective degradation of cyclohexanecarboxylic acid by visible LED driven photo-Fenton

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