Removal of Reactive Black 5 by UV-C assisted peroxydisulfate process: Effect of parameters, kinetic study, and phytotoxicity assessment

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dc.contributor.authorOmac, Feyza
dc.contributor.authorKarakurt, Huseyin
dc.contributor.authorKartal, Ozlem Esen
dc.date.accessioned2024-08-04T20:55:08Z
dc.date.available2024-08-04T20:55:08Z
dc.date.issued2024
dc.departmentİnönü Üniversitesien_US
dc.description.abstractPhotochemical removal of Reactive Black 5 (RB5) was investigated by the UV-C assisted peroxydisulfate (UV-C/PDS) process. Parameters affecting the removal of RB5 were examined. Activation of PDS by UV-C light significantly improved the removal efficiency compared to direct photolysis or PDS alone. The removal of RB5 by UV-C/PDS process fitted well with the pseudo first-order kinetic model under all tested conditions. Almost complete removal of RB5 was achieved at the end of 120 min within the pH range of 3-7, whereas 90.7 and 89.4% removal efficiency values were observed at pH = 9 and 11, respectively. An increase in PDS dosage in the range of 0.25-1 mM led to a rise in removal from 48.5 to 97.3% after 120 min, and a complete removal was observed with a dosage higher than 2 mM. Pseudo firstorder rate constant (kobs) increased linearly with PDS dosage from 0.0058 to 0.0518 min-1 in the 0.25 mM - 2.3 mM concentration range. The removal efficiency decreased with an increase in the initial concentration of RB5 from 20 to 50 mg L-1 and an exponential correlation was observed between kobs and initial concentration of RB5. Scavenging experiments conducted using t-butyl alcohol and ethyl alcohol implied that both sulphate and hydroxyl radicals were involved in the removal of RB5. Adding HCO3- decreased the removal of RB5 within the range of 1-30 mM. The presence of CI- showed a negative impact on the removal at low concentrations (1-15 mM) and NO3- slightly inhibited the removal of RB5. With corresponding stoichiometric PDS dosage, almost a complete mineralisation was achieved for RB5 solution and simulated dyebath effluent after 720 min of reaction time. EE/O values were determined to be 91.0, 76.8, and 41.1 kWh m-3 order-1 for UV-C/H2O2, UV-C/PMS, and UV-C/PDS processes, respectively. The phytotoxicity tests indicated that the intermediates could be more toxic than the parent compound.en_US
dc.description.sponsorshipInonu University [FLY- 2019-1600]; Scientific Research Projects Coordination Unit of Inonu Universityen_US
dc.description.sponsorshipThe Scientific Research Projects Coordination Unit of Inonu University is acknowledged for financial support under BAP grant number FLY- 2019-1600.en_US
dc.identifier.doi10.1080/03067319.2024.2317424
dc.identifier.issn0306-7319
dc.identifier.issn1029-0397
dc.identifier.scopus2-s2.0-85186540697en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.urihttps://doi.org/10.1080/03067319.2024.2317424
dc.identifier.urihttps://hdl.handle.net/11616/101857
dc.identifier.wosWOS:001174907600001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTaylor & Francis Ltden_US
dc.relation.ispartofInternational Journal of Environmental Analytical Chemistryen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectPeroxydisulfateen_US
dc.subjectsulphate radicalen_US
dc.subjectazo dyeen_US
dc.subjectdecolourisationen_US
dc.subjectelectrical energy consumptionen_US
dc.subjectmineralisationen_US
dc.titleRemoval of Reactive Black 5 by UV-C assisted peroxydisulfate process: Effect of parameters, kinetic study, and phytotoxicity assessmenten_US
dc.typeArticleen_US

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