Enhanced effect of pyrite on the removal of metronidazole by zero valent iron

Han, Linting; Chen, Kun; Dong, Hua; Li, Jianfa; Li, Yimin

doi:10.1016/j.jcis.2021.05.093

Cited by 13 publications

(1 citation statement)

References 60 publications

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“…Nonetheless, the slight decrease in elimination effectiveness may be ascribed to the by-product formation during the elimination process, which could accumulate on the nanocomposite surface and obstruct the active sites on the catalyst surface, thereby hindering the removal of TC 86 . Furthermore, the photocatalytic efficiency of TiO 2 /NP probably declined due to the nanocomposite surface passivation and the number of ferrous ions released from the pyrite, which occurred after multiple uses of the catalyst 87 . Moreover, XRD analysis was used to further investigate the stability of the photocatalyst.…”

Section: Resultsmentioning

confidence: 99%

Enhanced tetracycline degradation with TiO2/natural pyrite S-scheme photocatalyst

Hasham Firooz,

Naderi,

Moradi

et al. 2024

Sci Rep

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In this study, TiO2 nanoparticles were employed as a photocatalyst for the degradation of tetracycline (TC) under visible light irradiation. The TiO2 nanoparticles were decorated on natural pyrite (TiO2/NP) and characterized using XRD, FTIR, and SEM–EDX methods. This study evaluated the impacts of various operational parameters such as pH, catalyst dosage, initial TC concentration, and light intensity on TC removal. The findings revealed that under optimal conditions (pH 7, catalyst: 2 g/L, TC: 30 mg/L, and light intensity: 60 mW/cm2), 100% of TC and 84% of TOC were removed within 180 min. The kinetics of TC elimination followed a first-order model. The dominant oxidation species involved in the photocatalytic elimination of TC was found to be ·OH radicals in the TiO2/NP system. The reuse experiments showed the high capability of the catalyst after four consecutive cycles. This study confirmed that the TiO2/NP system has high performance in photocatalytic TC removal under optimized experimental conditions.

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Section: Resultsmentioning

confidence: 99%

Enhanced tetracycline degradation with TiO2/natural pyrite S-scheme photocatalyst

Hasham Firooz,

Naderi,

Moradi

et al. 2024

Sci Rep

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

Oral,

Kantar,

Yildiz

2024

Environ Sci Pollut Res

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This 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.

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Ball-milled Fe0/FeS2 enhanced interaction of Shewanella oneidensis MR-1 with anaerobic microbial community: Impact on 2,4-dichloronitrobenzene reduction and methane yield

Mun

et al. 2023

Chemical Engineering Journal

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Enhanced effect of pyrite on the removal of metronidazole by zero valent iron

Cited by 13 publications

References 60 publications

Enhanced tetracycline degradation with TiO2/natural pyrite S-scheme photocatalyst

Enhanced tetracycline degradation with TiO2/natural pyrite S-scheme photocatalyst

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

Ball-milled Fe0/FeS2 enhanced interaction of Shewanella oneidensis MR-1 with anaerobic microbial community: Impact on 2,4-dichloronitrobenzene reduction and methane yield

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