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. 2021 May:589:298-307.
doi: 10.1016/j.jcis.2020.12.123. Epub 2021 Jan 5.

Degradation of organic dyes by peroxymonosulfate activated with water-stable iron-based metal organic frameworks

Ziyi Xiao  1 , Yu Li  1 , Lu Fan  1 , Yingxi Wang  2 , Ling Li  3
Affiliations

Degradation of organic dyes by peroxymonosulfate activated with water-stable iron-based metal organic frameworks

Ziyi Xiao et al. J Colloid Interface Sci. 2021 May.

Abstract

In this study, MIL-101(Fe) is prepared via a facile solvent-thermal method, and then applied as catalyst for activating PMS, thus generating reactive radicals for organic dyes removal in aqueous solution. Rhodamine B (RhB), Malachite Green (MG) and Methylene Blue (MB) were selected as model pollutants. The experiments showed that MIL-101(Fe)/PMS had higher removal efficiency for dyes than MIL-101(Fe), indicating that MIL-101(Fe) can be simultaneously used as adsorbent and PMS-activating catalyst for dyes removal. The effects of initial pH and the coexisted negative ions on MB degradation were further discussed, showing that MIL-101(Fe) can degrade MB with excellent stability. Furthermore, the reactive species in MIL-101(Fe)/PMS system were deduced as sulfate radicals and hydroxyl radicals. Finally, the degradation intermediates and possible degradation pathway were investigated by LC-MS.

Keywords: Degradation; Dyes; MIL-101(Fe); PMS.

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Conflict of interest statement

Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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