Electrochemical Reduction of X-ray Contrast Iohexol at Mixed Metal Oxide Electrodes: Process Optimization and By-product Identification

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dc.contributor.authorTürkay, Özge
dc.contributor.authorBarışçı, Sibel
dc.contributor.authorUlusoy, Ebru
dc.contributor.authorDimoglo, Anatoli
dc.date.accessioned2020-05-01T09:12:13Z
dc.date.available2020-05-01T09:12:13Z
dc.date.issued2018
dc.departmentDÜ, Mühendislik Fakültesi, Çevre Mühendisliği Bölümüen_US
dc.descriptionBarisci, Sibel/0000-0003-4229-0408; Dinc, Ozge/0000-0002-3029-7840; turkay, ozge/0000-0003-3922-8208en_US
dc.descriptionWOS: 000433261100004en_US
dc.description.abstractThe reduction of commonly used X-ray contrast iohexol (IOX) by the electrooxidation process is presented in this study. To begin with, the effect of anode material was examined, and different mixed metal oxide electrodes (MMOs) such as Ti/RuO2, Ti/Pt, Ti/IrO2-RuO2, Ti/IrO2-Ta2O5, Ti/Ta2O5-SnO2-IrO2, and Pt/SnO2 were used. To assess experimental conditions at Ti/RuO2 anode, provided the highest removal efficiency, the response surface method was applied and the key influencing parameter was the process time. The determined optimal conditions were triplicated with real wastewater samples, and the average degradation efficiency of IOX was found to be 99%. By-products of the IOX degradation on the Ti/RuO2 anode have been identified using density functional theory and LC/MS-MS analysis. The results showed that IOX degradation opened with OH group detachment and resulted in the formation of a by-product with a molecular mass of 804 g mol(-1). Further degradation mechanism took place due to the breakup of C-4-C-10 and C-5-I-7 bonds with a by-product formed as 603 g mol(-1). Iodide atom replacement by OH groups caused the formation of a molecular fragment with 375 g mol(-1) molecular weight. The further disintegration of C-2-C-11 and C-6-N-16 sigma- bonds led to the formation of molecular masses of 133, 126, and 119 g mol(-1), respectively.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [114Y606]en_US
dc.description.sponsorshipThis study received a financial support from The Scientific and Technological Research Council of Turkey (TUBITAK) [project number: 114Y606].en_US
dc.identifier.doi10.1007/s11270-018-3823-0en_US
dc.identifier.issn0049-6979
dc.identifier.issn1573-2932
dc.identifier.issue6en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1007/s11270-018-3823-0
dc.identifier.urihttps://hdl.handle.net/20.500.12684/5910
dc.identifier.volume229en_US
dc.identifier.wosWOS:000433261100004en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer International Publishing Agen_US
dc.relation.ispartofWater Air And Soil Pollutionen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectElectrooxidationen_US
dc.subjectIohexolen_US
dc.subjectMixed metal oxidesen_US
dc.subjectX-ray contrasten_US
dc.subjectDensity functional theoryen_US
dc.subjectDegradation by-productsen_US
dc.titleElectrochemical Reduction of X-ray Contrast Iohexol at Mixed Metal Oxide Electrodes: Process Optimization and By-product Identificationen_US
dc.typeArticleen_US

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