Issue 4, 2019
From the journal:

RSC Advances

Efficient degradation of organic pollutants by peroxymonosulfate activated with MgCuFe-layered double hydroxide†

Jianyao Zhu,ac   Zhiliang Zhu, ORCID logo *ac   Hua Zhang,a   Hongtao Lua  and  Yanling Qiubc  

* Corresponding authors

a State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
E-mail: zzl@tongji.edu.cn

b Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China

c Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China

Abstract

In this study, MgCuFe-layered double hydroxide (MgCuFe-LDH) was for the first time used as a catalyst for peroxymonosulfate (PMS) activation towards the degradation of aqueous organic pollutants. Compared with both MgFe-LDH and MgCuAl-LDH materials, MgCuFe-LDH exhibited significantly higher catalytic activity to activate PMS for the degradation of acetaminophen. The effects of catalyst loading, PMS dosage, reaction temperature and initial solution pH on the degradation efficiency of acetaminophen were investigated. Acetaminophen (5 mg L−1) degradation at about 93.0% was achieved at 20 min by using 0.3 g L−1 MgCuFe-LDH and 0.5 mM PMS. Under the same conditions, rhodamine B (RhB, 5 mg L−1) can be almost completely decolorized (99.5%) within 45 min. Radical scavenger and electron paramagnetic resonance (EPR) experiments showed that sulfate radicals (SO4˙−) and hydroxyl radicals (·OH) existed in PMS/MgCuFe-LDH system. The generated radicals played vital roles in the catalytic degradation of organic pollutants. A possible activation mechanism of PMS on MgCuFe-LDH was put forward. This study indicates that MgCuFe-LDH is a promising catalyst to activate PMS for the efficient degradation of organic pollutants.

Graphical abstract: Efficient degradation of organic pollutants by peroxymonosulfate activated with MgCuFe-layered double hydroxide

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Article information

DOI
https://doi.org/10.1039/C8RA09841G
Article type
Paper
Submitted
30 Nov 2018
Accepted
08 Jan 2019
First published
17 Jan 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 2284-2291

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Efficient degradation of organic pollutants by peroxymonosulfate activated with MgCuFe-layered double hydroxide

J. Zhu, Z. Zhu, H. Zhang, H. Lu and Y. Qiu, RSC Adv., 2019, 9, 2284 DOI: 10.1039/C8RA09841G

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