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Degradation of tetracycline by peroxymonosulfate activated with zero-valent iron: Performance, intermediates, toxicity and mechanism

Cao, Jinyan, Lai, Leiduo, Lai, Bo, Yao, Gang, Chen, Xi, Song, Liping·2019·Chemical Engineering Journal

Abstract

Abstract In this paper, the degradation of tetracycline (TC) by peroxymonosulfate (PMS) activated with zero-valent iron (Fe0) was systematically studied through batches of experiments. First, effects of the key parameters (i.e., Fe0 dosage, PMS dosage, initial pH and co-existing ions) on TC degradation were investigated. Under the optimal conditions, high TC removal efficiency (88.5%) was achieved after 5 min treatment. Also, four control experiments were conducted to demonstrate the excellent performance of Fe0/PMS process and the synergistic effect between Fe0 and PMS. Compared with Fe2+ (the relatively common PMS activator), Fe0 was an efficient and long-lasting activator which consume less PMS and produce less dissolved iron ions. Then, the characteristics of reacted Fe0 particles were analyzed by SEM-EDS, XRD and XPS. The results shows that a few iron corrosion products generated and some of them deposited on the surface of reacted Fe0 particles. The generated iron corrosion products could promote PMS activation or adsorb TC directly. Next, the possible degradation pathway of TC was elaborated according to the intermediates detected by LC-QTOF-MS/MS and the toxicity in solution during reaction was evaluated. Finally, the common free radicals were monitored and the reaction mechanism was proposed.

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Metadata

Authors
Cao, J., Lai, L., Lai, B., Yao, G., Chen, X., & Song, L.
Venue
Chemical Engineering Journal
Publisher
Elsevier BV
Published
2019-05
Volume
364
Pages
45-56
ISSN
1385-8947 (ISSN-L)
OpenAlex
W2913204964
Cited by
647
References
1
FWCI
28.97
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Degradation of tetracycline by peroxymonosulfate activated with zero-valent iron: Performance, intermediates, toxicity and mechanism. https://app.cochat.ai/papers/10.1016/j.cej.2019.01.113
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Cao, J., Lai, L., Lai, B., Yao, G., Chen, X., & Song, L. (2019). Degradation of tetracycline by peroxymonosulfate activated with zero-valent iron: Performance, intermediates, toxicity and mechanism. Chemical Engineering Journal. https://doi.org/10.1016/j.cej.2019.01.113

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