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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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