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Open AccessArticle

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

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Department of Industrial Machines and Equipment, Faculty of Engineering, “Lucian Blaga” University of Sibiu, 2-4 Emil Cioran Street, 550024 Sibiu, Romania
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Department of Horticultural Technologies, Faculty of Horticulture, University of Agricultural Sciences and Veterinary Medicine of Iasi, 3 Mihail Sadoveanu Alley, 700490 Iasi, Romania
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Department of Chemical and Food Engineering, Faculty of Engineering, University of Bacau, 157 Calea Marasesti, 600115 Bacau, Romania
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Department of Applied Biotechnology and Food Science, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
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Research Group in Environmental Sciences and Applied Materials (SEMA), Sultan Moulay Slimane University of Beni Mellal, FP Khouribga, B.P. 145, 25000 Khouribga, Morocco
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Ecole Nationale Supérieure de Chimie de Rennes, Univ Rennes, CNRS, ISCR–UMR6226, F-35000 Rennes, France
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Authors to whom correspondence should be addressed.
Catalysts 2019, 9(9), 761; https://doi.org/10.3390/catal9090761
Received: 8 August 2019 / Revised: 3 September 2019 / Accepted: 5 September 2019 / Published: 11 September 2019
(This article belongs to the Special Issue Photocatalysis Science and Engineering in Europe)
This work demonstrates new evidence of the efficient destruction and mineralization of an emergent organic pollutant using UV-A and titanium nanosized catalysts. The target compound considered in this work is the primary metabolite of a lipid regulator drug, clofibrate, identified in many studies as refractory during conventional wastewater treatment. The photocatalytic performance study was carried out in batch mode at laboratory scale, in aqueous suspension. Kinetic data showed that titanium dioxide P25 Aeroxide® exhibits the highest photocatalytic efficiency compared to the other investigated catalysts. Pollutant degradation and mineralization efficiencies strongly increased when decreasing the initial substrate concentration. Target molecules oxidized faster when the catalyst load increased, and the mineralization was enhanced under acidic conditions: 92% of mineralization was achieved at pH 4 after 190 min of reaction. Radical quenching assays confirmed that HO and ( h vb + ) were the reactive oxygen species involved in the photocatalytic oxidation of the considered pollutant. In addition, further results revealed that the removal efficiency decreased in real water matrices. Finally, data collected through a series of phytotoxicity tests demonstrated that the photocatalytic process considerably reduces the toxicity of the treated solutions, confirming the process’s effectiveness in the removal of persistent and biorefractory emergent organic water pollutants. View Full-Text
Keywords: emerging water pollutants; pharmaceutic compounds; titania catalysts; photocatalysis; kinetics; degradation; mineralization; toxicity emerging water pollutants; pharmaceutic compounds; titania catalysts; photocatalysis; kinetics; degradation; mineralization; toxicity
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MDPI and ACS Style

Vrinceanu, N.; Hlihor, R.M.; Simion, A.I.; Rusu, L.; Fekete-Kertész, I.; Barka, N.; Favier, L. New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts. Catalysts 2019, 9, 761.

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