Bimetallic metal-organic framework as a high-performance peracetic acid activator for sulfamethoxazole degradation

Gaofeng Zhou; Yiqing Liu; Runyu Zhou; Li Zhang; Yongsheng Fu

doi:10.1016/j.chemosphere.2023.140958

Bimetallic metal-organic framework as a high-performance peracetic acid activator for sulfamethoxazole degradation

Chemosphere. 2024 Feb:349:140958. doi: 10.1016/j.chemosphere.2023.140958. Epub 2023 Dec 15.

Authors

Gaofeng Zhou¹, Yiqing Liu², Runyu Zhou³, Li Zhang⁴, Yongsheng Fu⁴

Affiliations

¹ Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China; Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China.
² Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China. Electronic address: liuyq@swjtu.edu.cn.
³ Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China; Zhejiang Development & Planning Institute, Hangzhou, 310012, China.
⁴ Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China.

PMID: 38104735
DOI: 10.1016/j.chemosphere.2023.140958

Abstract

A novel 3D bimetallic metal-organic framework (MOF(Fe-Co)) was successfully prepared and its performance on sulfamethoxazole (SMX) removal in advanced oxidation process (AOP) based on peracetic acid (PAA) was evaluated. MOF(Fe-Co) exhibited an efficient catalytic performance on PAA activation for SMX degradation under neutral condition. Increasing PAA concentration could enhance SMX removal, while the variation of MOF(Fe-Co) dosage from 0.05 to 0.2 g/L had an inappreciable effect on SMX removal. According to the results of inductively coupled plasma mass spectrometry analyses and X-ray photoelectron spectroscopy, catalytic reactions mainly occurred on the surface of MOF(Fe-Co). Organic radicals (i.e., CH₃C(O)OO^• and CH₃C(O)O^•) were demonstrated to be the predominant reactive radicals for SMX degradation by MOF(Fe-Co)/PAA through radical quenching experiments. The presence of Cl^- could enhance the degradation of SMX by MOF(Fe-Co)/PAA, while HCO₃^- and natural organic matter inhibited SMX degradation severely. Five identified degradation products were detected in this system and four possible SMX transformation pathways were proposed, including amino oxidation, S-N bond cleavage, coupling reaction and hydroxylation.

Keywords: Bimetallic catalyst; Metal-organic framework; Organic radicals; Peracetic acid; Sulfamethoxazole.

MeSH terms

Hydrogen Peroxide / chemistry
Metal-Organic Frameworks*
Oxidation-Reduction
Peracetic Acid
Sulfamethoxazole / chemistry
Water Pollutants, Chemical* / analysis

Substances

Peracetic Acid
Sulfamethoxazole
Metal-Organic Frameworks
Water Pollutants, Chemical
Hydrogen Peroxide