Intensification of the photodegradation efficiency of an emergent water pollutant through process conditions optimization by means of response surface methodology

Autor: Lidia Favier, null Andrei-Ionuț Simion, Raluca Maria Hlihor, Ildikó Fekete-Kertész, Mónika Molnár, Maria Harja, Christophe Vial
Přispěvatelé: Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), University of Bacău Vasile Alecsandri, Budapest University of Technology and Economics [Budapest] (BME), 'Gheorghe Asachi' Technical University of Iasi (TUIASI), Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA), Contribution of R.M. Hlihor in this manuscript was supported by a grant of the Romanian Ministry of Education and Research, CCCDI - UEFISCDI, project number PN-III-P2-2.1-PED-2019-2430, within PNCDI III
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Environmental Management
Journal of Environmental Management, 2023, 328, pp.116928. ⟨10.1016/j.jenvman.2022.116928⟩
ISSN: 0301-4797
1095-8630
DOI: 10.1016/j.jenvman.2022.116928⟩
Popis: International audience; Heterogeneous photocatalysis has been increasingly investigated during the past years and has been recognized as a promising technique for clean and safe water purification. The current study exploits the advantage of this technique demonstrating that the removal of a biorefractory water pollutant named clofibric acid can be really improved by photocatalysis through a parametric comprehensive investigation and optimization study based on response surface methodology. Its novelty comes from the approach used to enhance the efficiency of the photocatalytic degradation of clofibric acid. A custom central composite design consisting of 49 trials was applied for process modeling and a quadratic robust model was derived based on the analysis of variance for the optimization of the process parameters. The effective removal of the target molecule with about 70% carbon mineralization was achieved under optimal photocatalytic conditions: 1.5 mg/L as the initial concentration of pollutant, 0.61 g/L catalyst, and an irradiation time of 190 min. Further, it was provided that nitrates play a positive role in the removal of this pollutant, while hydrogenocarbonates slow down its elimination. The ecotoxicity evaluation at different trophic levels confirmed the low toxicity of photodegradation by-products. Data analysis demonstrated that response surface methodology is a reliable approach for the optimization of the interactive effects of photocatalytic process parameters and is able to enhance their performance for the complete elimination of this hardly removed water pollutant.
Databáze: OpenAIRE
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