REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS

This paper aims to study the degradation and oxidation/mineralization process of cephalexin in model systems using Fenton’s reagent for UV irradiation (λ = 254 nm). The effect of pH (2-11), concentration of H2 O2 (0,34- 34 mg/L) and concentration of Fe(II) (0-28 mg/L) on the degradation of 50 mg/L C...

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Autores principales:	Larisa MOCANU, Maria GONȚA, Vera MATVEEVICI, Gheorghe DUCA, Veronica PORUBIN-SCHIMBĂTOR
Formato:	article
Lenguaje:	EN RO RU
Publicado:	Academy of Sciences of Moldova 2021
Materias:	cephalexin photocatalytic oxidation photo-fenton reagent uv irradiation physicochemical parameters optimization Arts in general NX1-820 Science Q
Acceso en línea:	https://doi.org/10.52673/18570461.21.2-61.03 https://doaj.org/article/a474ecc97cb840659f946a2894571a8f
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spelling	oai:doaj.org-article:a474ecc97cb840659f946a2894571a8f2021-11-03T19:38:12ZREMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESShttps://doi.org/10.52673/18570461.21.2-61.031857-0461https://doaj.org/article/a474ecc97cb840659f946a2894571a8f2021-06-01T00:00:00Zhttp://www.akademos.asm.md/files/53-60.pdfhttps://doaj.org/toc/1857-0461This paper aims to study the degradation and oxidation/mineralization process of cephalexin in model systems using Fenton’s reagent for UV irradiation (λ = 254 nm). The effect of pH (2-11), concentration of H2 O2 (0,34- 34 mg/L) and concentration of Fe(II) (0-28 mg/L) on the degradation of 50 mg/L CPX were investigated. It has been determined optimum conditions for photocatalytic oxidation of CPX. Increasing the amount of H2 O2 plays an inhibitory role in the production of hydroxyl radicals and reduces the process efficiency. This can be attributed to the reaction of excess peroxide with • OH and the formation of HO2 • , which has less oxidizing power compared to free hydroxyl radical. And as the concentration of the catalyst increases to the optimum, the excess of Fe(II) ions reacts with the hydroxyl radical and, therefore, the efficiency of the process also is reduced. Accordingly, the optimum degradation efficiency of 88 % and 83% for COD was obtained under the following conditions: pH 2,5, H2 O2 concentration – 3,4 mg/L, Fe(II) ions concentration – 5,6 mg/L, cephalexin concentration – 50 mg/L, and reaction time – 60 min. Thus, the current study demonstrated that the photo-Fenton reactor can be used effectively as an advanced oxidation treatment unit for degradation of cephalexin under optimized environmental conditions.Larisa MOCANUMaria GONȚAVera MATVEEVICIGheorghe DUCAVeronica PORUBIN-SCHIMBĂTORAcademy of Sciences of Moldovaarticlecephalexinphotocatalytic oxidationphoto-fenton reagentuv irradiationphysicochemical parametersoptimizationArts in generalNX1-820ScienceQENRORUAkademos: Revista de Ştiinţă, Inovare, Cultură şi Artă, Vol Nr. 2, Iss 61, Pp 53-60 (2021)
institution	DOAJ
collection	DOAJ
language	EN RO RU
topic	cephalexin photocatalytic oxidation photo-fenton reagent uv irradiation physicochemical parameters optimization Arts in general NX1-820 Science Q
spellingShingle	cephalexin photocatalytic oxidation photo-fenton reagent uv irradiation physicochemical parameters optimization Arts in general NX1-820 Science Q Larisa MOCANU Maria GONȚA Vera MATVEEVICI Gheorghe DUCA Veronica PORUBIN-SCHIMBĂTOR REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS
description	This paper aims to study the degradation and oxidation/mineralization process of cephalexin in model systems using Fenton’s reagent for UV irradiation (λ = 254 nm). The effect of pH (2-11), concentration of H2 O2 (0,34- 34 mg/L) and concentration of Fe(II) (0-28 mg/L) on the degradation of 50 mg/L CPX were investigated. It has been determined optimum conditions for photocatalytic oxidation of CPX. Increasing the amount of H2 O2 plays an inhibitory role in the production of hydroxyl radicals and reduces the process efficiency. This can be attributed to the reaction of excess peroxide with • OH and the formation of HO2 • , which has less oxidizing power compared to free hydroxyl radical. And as the concentration of the catalyst increases to the optimum, the excess of Fe(II) ions reacts with the hydroxyl radical and, therefore, the efficiency of the process also is reduced. Accordingly, the optimum degradation efficiency of 88 % and 83% for COD was obtained under the following conditions: pH 2,5, H2 O2 concentration – 3,4 mg/L, Fe(II) ions concentration – 5,6 mg/L, cephalexin concentration – 50 mg/L, and reaction time – 60 min. Thus, the current study demonstrated that the photo-Fenton reactor can be used effectively as an advanced oxidation treatment unit for degradation of cephalexin under optimized environmental conditions.
format	article
author	Larisa MOCANU Maria GONȚA Vera MATVEEVICI Gheorghe DUCA Veronica PORUBIN-SCHIMBĂTOR
author_facet	Larisa MOCANU Maria GONȚA Vera MATVEEVICI Gheorghe DUCA Veronica PORUBIN-SCHIMBĂTOR
author_sort	Larisa MOCANU
title	REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS
title_short	REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS
title_full	REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS
title_fullStr	REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS
title_full_unstemmed	REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS
title_sort	removal of cephalexin from aqueous solutions using the fenton photocatalytic process
publisher	Academy of Sciences of Moldova
publishDate	2021
url	https://doi.org/10.52673/18570461.21.2-61.03 https://doaj.org/article/a474ecc97cb840659f946a2894571a8f
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_version_	1718445413023875072

REMOVAL OF CEPHALEXIN FROM AQUEOUS SOLUTIONS USING THE FENTON PHOTOCATALYTIC PROCESS

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