Use of mine waste for H2O2-assisted heterogeneous Fenton-like degradation of tetracycline by natural pyrite nanoparticles

Title

Use of mine waste for H2O2-assisted heterogeneous Fenton-like degradation of tetracycline by natural pyrite nanoparticles: Catalyst characterization, degradation mechanism, operational parameters and cytotoxicity assessment

 Author

Mashayekh-Salehi, Ali (Shahroud University of Medical Sciences)
Akbarmojeni, Khatare (Tehran University of Medical Sciences)
Roudbari, Aliakbar (Shahroud University of Medical Sciences)
van der Hoek, J.P. (TU Delft Sanitary Engineering) ORCID 0000-0002-0674-388X
Nabizadeh, Ramin (Tehran University of Medical Sciences)
Dehghani, Mohammad Hadi (Tehran University of Medical Sciences)
Yaghmaeian, Kamyar (Tehran University of Medical Sciences)

Date

2021

 Abstract

Degradation of tetracycline (TTC) with a heterogeneous Fenton-like pyrite/H2O2 process by pyrite from mine waste as a mineral catalyst was investigated. The study focused on identifying the main oxidizing agents and degradation mechanisms along with operational variables including solution pH, pyrite and H2O2 concentration, contact time, solution temperature, and initial TTC concentration. Catalyst characterization tests revealed that pyrite is a mesoporous powder with a high degree of FeS2 purity. Radical scavenger tests demonstrated that •OH was the main oxidizing agent generated by both solution and surface phase reactions. During the pyrite/H2O2 process, more than 85% of TTC was mineralized in 60 min and the maximum TTC removal was attained in the solution at an acidic pH value (4.1). The most abundant transformation products of TTC, formed by the attack of •OH radicals, were simple chain carboxylic acids. Cultured cells of human embryonic kidney (HEK) were used for the cytotoxicity assessment of raw and pyrite/H2O2 treated TTC solutions. The results illustrated that the viability of HEK cells was enhanced considerably after treating TTC solutions under optimal conditions. Accordingly, pyrite originating from mine waste is a practically effective and cost-effective catalyst in heterogeneous Fenton-like systems for mineralization and degradation of emerging contaminants such as antibiotics.


 Subject

Cell viability
Emerging contaminants
Fenton-like
Mineralization
Pyrite
Sulfur defect
Tetracycline

 To reference this document use:

http://resolver.tudelft.nl/uuid:e4284842-983d-4c2d-a1ba-fdc383b1cf41

 DOI

https://doi.org/10.1016/j.jclepro.2020.125235

 Embargo date

2021-05-23

 ISSN

0959-6526

 Source

Journal of Cleaner Production, 291

 Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2021 Ali Mashayekh-Salehi, Khatare Akbarmojeni, Aliakbar Roudbari, J.P. van der Hoek, Ramin Nabizadeh, Mohammad Hadi Dehghani, Kamyar Yaghmaeian
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