Kinetics of UV-A/TiO2 photocatalytic degradation and mineralization of the antibiotic sulfamethoxazole in aqueous matrices

Xekoukoulotakis, Nikolaos P.; Drosou, Catherine; Brebou, Christina; Chatzisymeon, Efthalia; Hapeshi, Evroula; Fatta‐Kassinos, Despo; Mantzavinos, Dionissios

doi:10.1016/j.cattod.2010.09.027

Cited by 143 publications

(71 citation statements)

References 36 publications

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“…This is because natural waters contain dissolved and suspended substances, coming from animal and plant materials break down and usually referred to as NOM. The presence of NOM and of other inorganic substances can affect estrogens' photo-degradation either positively or, most commonly, negatively [24,25,30]. Therefore, in this work the effect of water matrix onto 100 g/L EE2 degradation is investigated both for solar/Fe 2+ and UVC/H 2 O 2 treatments (Fig.…”

Section: Effect Of the Water Matrixmentioning

confidence: 98%

UV and simulated solar photodegradation of 17α-ethynylestradiol in secondary-treated wastewater by hydrogen peroxide or iron addition

et al. 2015

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Please cite this article in press as: Z. Frontistis, et al., UV and simulated solar photodegradation of 17␣-ethynylestradiol in secondarytreated wastewater by hydrogen peroxide or iron addition, Catal. Today (2014), http://dx. a b s t r a c tThe extensive use of estrogens and their release, through various pathways, into the environment, constitutes an emerging environmental problem that poses serious threats onto public health. In this work the efficiency of UVC/H 2 O 2 and solar/Fe 2+ treatment to degrade 17␣-ethynylestradiol (EE2) in environmentally relevant concentrations of 100 g/L in secondary-treated wastewater matrices was investigated. Also, photolytic treatment was performed under different irradiation sources, namely UVC, UVA and simulated solar light. The effect of H 2 O 2 (0-20 mg/L) and Fe 2+ (0-15 mg/L) concentration was investigated and, at optimal operating parameters, EE2 removal was 100% after 15 min of UVC/H 2 O 2 treatment, while EE2 removal reached 86% after 60 min of solar/Fe 2+ treatment. In addition, the effect of water matrix and pH was studied. Total organic carbon (TOC) and yeast estrogen screening (YES) measurements showed the formation of stable intermediate products during EE2 treatment and an attempt to elucidate the reaction pathways and mechanisms through the identification of transformation products (TPs) by means of UPLC-MS/MS was made. Several TPs, including quinone methide and 1,2-quinone derivatives, were identified and competing pathways were suggested, in which hydroxylation, alkylation, dealkylation, demethylation and dehydroxylation, amongst others were described as major transformation mechanisms.

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Section: Effect Of the Water Matrixmentioning

confidence: 98%

UV and simulated solar photodegradation of 17α-ethynylestradiol in secondary-treated wastewater by hydrogen peroxide or iron addition

et al. 2015

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“…The photocatalysis in the presence of Degussa P25 TiO 2 and UV light has been reported to be an effective technology for SMX removal [9]. Although TiO 2 could efficiently decompose SMX under UV light, only 3-5% of the solar energy is UV light and the development of visible-light-sensitive TiO 2 photocatalysts is thus required.…”

Section: Introductionmentioning

confidence: 99%

“…Several treatment methods including adsorption [3,4], biodegradation [5,6], photolysis [7,8] and photocatalysis [8][9][10][11] have been used for removal of SMX in aquatic solutions. The photocatalysis in the presence of Degussa P25 TiO 2 and UV light has been reported to be an effective technology for SMX removal [9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic degradation of sulfamethoxazole by visible-light-sensitive TiO2 with low Cu addition

Chiang

Doong

2015

Separation and Purification Technology

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“…Ces résultats sont similaires à ceux de Xekoukoulotakis et al (2011) ;Hapeshi et al (2010) ;Abellán et al (2009). Ces auteurs ont montré que cette efficacité traduit une production abondante de radicaux hydroxyles.…”

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Dégradation photocatalytique du 5-fluorouracile par un système UV-A/TiO2 : effet de la concentration du catalyseur et du polluant, du pH et des matrices de dilution

N’guettia¹,

Bertrand²,

Soro³

et al. 2017

Int. J. Bio. Chem. Sci

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; Tél : +225 48 53 40 09 REMERCIEMENTS Nous remercions les acteurs du projet AMURGE (Appui à la modernisation et à la réforme des universités et grandes écoles de Côte d'Ivoire) pour leur contribution financière à la réalisation de ces travaux. RÉSUMÉLes résidus de médicaments anticancéreux font partie des micropolluants émergents souvent détectés dans les écosystèmes aquatiques. L'objectif de cette étude était de préciser l'influence de la concentration en catalyseur (TiO 2 ) -de l'eau du robinet est vraisemblablement responsable de la diminution de la vitesse constatée, les ions hydrogénocarbonate agissant comme des pièges à radicaux. La variation du pH de 3 à 10 a montré une vitesse optimale pour un pH = 5,8. Egalement, dans l'eau usée, les résultats se sont montrés similaires à ceux obtenus dans l'eau de robinet. © 2017 International Formulae Group. All rights reserved.Mots clés : 5-fluorouracile, UV-A/TiO 2 , eau ultra pure, eau bicarbonatée, eau usée.Photocatalytic degradation of 5-fluorouracil by a UV-A / TiO 2 system: effect of catalyst concentration and pollutant, pH and dilution matrices ABSTRACT Residues of anticancer drugs are among the emerging micropollutants often identified in aquatic ecosystems. The aim of this study was to explain the influence of the concentration of the catalyst (TiO 2 ) and of water matrix composition on the photocatalytic degradation of 5-flurouracil (20 mg.L -1 ). For this purpose, GUETTIA et al. / Int. J. Biol. Chem. Sci. 11(3): 1373-1385, 2017 1374 photocatalytic tests were carried out with suspensions of titanium dioxide at concentrations between 0.1 to 1.0 g.L -1 in ultrapure water and tap water (water with high calcium hardness: with a hydrotimetric parameters > 35° F). The results showed that more than 80% after 120 min of irradiation (UV-A) in ultra-pure at concentrations of 0.1 g L -1 to 1 g L -1 of TiO 2 . However, this rate is 33% and 75% for these same concentrations in tap water matrices. The high concentration of bicarbonate ions in tap water (HCO 3 -) is probably responsible for the decrease in the observed velocity, as the bicarbonate ions act as radical traps. The results in the wastewater matrice are same with those obtained in the tap water. The pH variation from 3 to 10 showed the optimum rate at pH 5.8.

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Kinetics of UV-A/TiO2 photocatalytic degradation and mineralization of the antibiotic sulfamethoxazole in aqueous matrices

Cited by 143 publications

References 36 publications

UV and simulated solar photodegradation of 17α-ethynylestradiol in secondary-treated wastewater by hydrogen peroxide or iron addition

UV and simulated solar photodegradation of 17α-ethynylestradiol in secondary-treated wastewater by hydrogen peroxide or iron addition

Enhanced photocatalytic degradation of sulfamethoxazole by visible-light-sensitive TiO2 with low Cu addition

Dégradation photocatalytique du 5-fluorouracile par un système UV-A/TiO2 : effet de la concentration du catalyseur et du polluant, du pH et des matrices de dilution

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