Diclofenac removal by pyrite-Fenton process: Performance in batch and fixed-bed continuous flow systems

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dc.authoridKantar, Cetin/0000-0001-9747-9115
dc.contributor.authorOral, Ozlem
dc.contributor.authorKantar, Cetin
dc.date.accessioned2025-01-27T21:05:30Z
dc.date.available2025-01-27T21:05:30Z
dc.date.issued2019
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis study provides experimental results from batch and column studies to investigate diclofenac degradation by pyrite-Fenton process under variable chemical conditions (e.g., pyrite loading). Batch experiments show that diclofenac removal increased with increasing hydrogen peroxide and pyrite concentration. On the other hand, the addition of organic chelating agents such as citrate had an adverse effect on diclofenac removal by pyrite-Fenton process in batch systems due to scavenging effect of these agents for hydroxyl radicals. Batch results showed a direct correlation between the rate of diclofenac degradation and the rate of iron dissolution from pyrite, suggesting that diclofenac removal by pyrite-Fenton process was mainly controlled by solution phase hydroxyl radical attack on aromatic structure. Column experiments show that the effluent diclofenac concentration initially reached a peak value, and then sharply decreased to zero at higher pore volumes. The initial diclofenac breakthrough coincided well with the highest Fe(II) concentration observed in the breakthrough curve, implying that the generation of excess Fe(II) had a detrimental effect on removal efficiency due to scavenging effect of excess Fe(II) for hydroxyl radicals. The column system continued to function with 100% diclofenac removal efficiency when the effluent Fe(II) concentration decreased to a level at which the scavenging effect was minimized. (C) 2019 Elsevier B.V. All rights reserved.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [115Y329]
dc.description.sponsorshipThe authors would like to acknowledge the funding provided by the Scientific and Technological Research Council of Turkey (TUBITAK Project # 115Y329). The HPLC analysis was performed in the Center for Environmental Research and Application (CEVSAM), Canakkale Onsekiz Mart University. The authors also thank four anonymous reviewers for the manuscript.
dc.identifier.doi10.1016/j.scitotenv.2019.02.084
dc.identifier.endpage823
dc.identifier.issn0048-9697
dc.identifier.issn1879-1026
dc.identifier.pmid30769305
dc.identifier.scopus2-s2.0-85061307082
dc.identifier.scopusqualityQ1
dc.identifier.startpage817
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2019.02.084
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27682
dc.identifier.volume664
dc.identifier.wosWOS:000460245600077
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherElsevier Science Bv
dc.relation.ispartofScience of The Total Environment
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectColumn
dc.subjectOrganic ligands
dc.subjectFenton
dc.subjectDiclofenac
dc.subjectDegradation
dc.titleDiclofenac removal by pyrite-Fenton process: Performance in batch and fixed-bed continuous flow systems
dc.typeArticle

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