Effect of pyrite on the treatment of chlorophenolic compounds with zero-valent iron-Fenton process under uncontrolled pH conditions: reaction mechanism and biodegradability

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dc.contributor.authorOral, Ozlem
dc.contributor.authorKantar, Cetin
dc.contributor.authorYildiz, Ilker
dc.date.accessioned2025-01-27T18:53:16Z
dc.date.available2025-01-27T18:53:16Z
dc.date.issued2024
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis current study explored the effect of pyrite on the treatment of chlorophenolic compounds (CP) by Fenton process with micron-sized zero-valent iron (ZVI) as the catalyst. The experiments were conducted in batch reactors with 100 mg L?1 CP, 0–0.02 M H2O2, and variable pyrite and ZVI doses (0–1 g L?1). Our findings show that while the reactor with 1 g L?1 ZVI as the only catalyst achieved only 10% CP removal efficiency due to rapid ZVI surface passivation and ZVI particle aggregation, the CP removal efficiency increased with increasing pyrite dose and reached 100% within couple of minutes in reactors with 0.8 g L?1 pyrite and 0.2 g L?1 ZVI. The CP removal was mainly driven by the oxidative treatment of CPs with some strong radicals such as hydroxyl radicals (•OH) while the adsorption onto the catalyst surface was only responsible for 10 to 25% of CP removals, depending on the type of CP studied. The positive impact of pyrite on CP removal by the ZVI/H2O2 system could be attributed to the ability of pyrite to (1) create an acidic environment for optimum Fenton process, (2) provide support material for ZVI to minimize ZVI particle agglomeration, and (3) stimulate iron redox cycling for improved surface site generation. Following oxidative Fenton treatment, the degradation intermediate products of CPs, including some aromatic compounds (benzoquinone, hydroquinone, etc.) and organic acids (e.g., acetic acid), became more biodegradable in comparison to their mother compounds. Overall, the treatment systems with a mixture of ZVI and pyrite as catalyst materials could offer a suitable cost-effective technology for the treatment of wastewater containing biologically non- or low-degradable toxic compounds such as chlorophenols. © The Author(s) 2024.
dc.description.sponsorshipTürkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK, (122Y183); Çanakkale Onsekiz Mart Üniversitesi, ÇOMÜ, (FDK-2022–3975)
dc.identifier.doi10.1007/s11356-024-34329-z
dc.identifier.endpage47850
dc.identifier.issn0944-1344
dc.identifier.issue35
dc.identifier.pmid39007977
dc.identifier.scopus2-s2.0-85198531074
dc.identifier.scopusqualityQ1
dc.identifier.startpage47836
dc.identifier.urihttps://doi.org/10.1007/s11356-024-34329-z
dc.identifier.urihttps://hdl.handle.net/20.500.12428/12656
dc.identifier.volume31
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofEnvironmental Science and Pollution Research
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250125
dc.subject2,4-dichlorophenol; 4-chlorophenol; Adsorption; Advanced oxidation processes; Enhanced biodegradability; Heterogeneous Fenton; Oxidative degradation; Wastewater treatment
dc.titleEffect of pyrite on the treatment of chlorophenolic compounds with zero-valent iron-Fenton process under uncontrolled pH conditions: reaction mechanism and biodegradability
dc.typeArticle

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