Issue 8, 2023

Effective heterogeneous Fenton-like degradation of antibiotics by ferroferric oxide nanoparticle coated reduced iron powder with accelerated Fe(ii)/Fe(iii) redox cycling

Abstract

Heterogeneous Fenton-like processes based on Fe-based catalysts are effective technology to degrade emerging organic pollutants in water and wastewater such as tetracycline (TC). However, the kinetically limited redox cycling between Fe2+ and Fe3+ is still a persistent challenge for their widespread application. To address this issue, we designed a novel Fe-based catalyst by coating reduced iron powder (RIP) with ferroferric oxide nanoparticles (FONP@RIP) using a simple chemical co-precipitation method. The reduced iron could rapidly reduce Fe(III) to Fe(II) and accelerate the cycle of Fe(II)/Fe(III) in the heterogeneous Fenton-like system. Benefiting from the accelerated cycle of Fe(II)/Fe(III), TC could be efficiently degraded in the FONP@RIP/H2O2 system over a wide pH range of 3–6, with a removal efficiency of 94.5% within 60 min (TC0 = 150 ppm). The predominant reactive oxygen species were identified as ˙OH and HO2˙. Based on the identified intermediates, the possible pathway of TC degradation was deduced and the toxicity of pollutants could also be significantly reduced during the degradation process. Moreover, FONP@RIP exhibited stable catalytic performance during multiple cyclic tests with only a marginal loss of catalytic components. This study presents a new catalyst design strategy for heterogeneous Fenton-like processes, which provides a promising way for the degradation of residual antibiotics in water and wastewater.

Graphical abstract: Effective heterogeneous Fenton-like degradation of antibiotics by ferroferric oxide nanoparticle coated reduced iron powder with accelerated Fe(ii)/Fe(iii) redox cycling

Supplementary files

Article information

Article type
Paper
Submitted
29 abr 2023
Accepted
30 jun 2023
First published
30 jun 2023

Environ. Sci.: Nano, 2023,10, 2066-2076

Effective heterogeneous Fenton-like degradation of antibiotics by ferroferric oxide nanoparticle coated reduced iron powder with accelerated Fe(II)/Fe(III) redox cycling

J. Zhou, X. Li, Q. Yi and Z. Wang, Environ. Sci.: Nano, 2023, 10, 2066 DOI: 10.1039/D3EN00272A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements