Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/57320
Title: Methylene blue treatment with zero-valent iron/pyrite/H2O2 system under static and continuous flow conditions: Reaction mechanism and toxicity evaluation
Authors: Oral, O.
Arslan, Ş.
Mercan, Dogan, N.
Yildiz, I.
Kantar, C.
Hafis, Abdelsalam, A.
Kuzucu, V.
Keywords: Dynamic flow reactor
Fenton
Genotoxic and cytotoxic analysis
Methylene blue
Pyrite
Zero-valent iron
Batch reactors
Cell culture
Escherichia coli
Free radicals
Iron
Oxidation
Precipitation (chemical)
Pyrites
Continuous-flow
Cytotoxic
Dynamic flow reactor
Dynamic flows
Fenton
Flow reactors
Genotoxic
Genotoxic and cytotoxic analyse
Methylene Blue
Zero-valent iron
Toxicity
Publisher: Korean Society of Industrial Engineering Chemistry
Abstract: Laboratory batch and continuous flow studies, coupled with surface and toxicity analysis, were performed to evaluate methylene blue treatment by heterogeneous Fenton process using zero-valent iron (ZVI) and pyrite as co-catalyst. The use of pyrite in batch reactors significantly enhanced methylene blue treatment by the ZVI/H2O2 system because of improved iron redox cycling. The continuous-flow experiments revealed that the reactor performance increased in the order of: ZVI/H2O2 < pyrite/H2O2 < ZVI/pyrite/H2O2 under dynamic flow conditions. The methylene blue treatment by the ternary ZVI/pyrite/H2O2 system was described by an initial degradation of methylene blue with *OH radicals, followed by the adsorption and/or co-precipitation of degradation intermediates with some spherical particles. The surface analysis showed that these spherical particles formed, even at pH less than 4. The genotoxicity and cytotoxicity tests performed on mouse embryonic fibroblast (3 T3-L1) and human embryonic kidney (HEK293) cell lines showed that the Fenton treatment of methylene blue using the ZVI/pyrite/H2O2 system resulted in the formation of degradation species with much lower toxicity levels relative to methylene blue. Moreover, the Fenton degradation species of methylene blue significantly enhanced the metabolic activity of several bacterial strains, including E. coli ATCC 8739 and P. aeruginosa PAO1. © 2024 The Korean Society of Industrial and Engineering Chemistry
URI: https://doi.org/10.1016/j.jiec.2024.04.044
https://hdl.handle.net/11499/57320
ISSN: 1226-086X
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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