The effect of interlayer water of metal-modified montmorillonite for catalytic ozonation

Yingjie Wen; Xu Chen; Linfeng Su; Shuqian Dong; Li Yi; Peilei He; Wen Yang; Zhiyi Lu

doi:10.1016/j.chemosphere.2022.137200

The effect of interlayer water of metal-modified montmorillonite for catalytic ozonation

Chemosphere. 2023 Jan;312(Pt 1):137200. doi: 10.1016/j.chemosphere.2022.137200. Epub 2022 Nov 11.

Authors

Yingjie Wen¹, Xu Chen², Linfeng Su³, Shuqian Dong³, Li Yi³, Peilei He³, Wen Yang⁴, Zhiyi Lu⁵

Affiliations

¹ Taiyuan University of Science and Technology, Taiyuan, 030024, PR China; Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, PR China.
² Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, PR China. Electronic address: [email protected].
³ Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, PR China.
⁴ Taiyuan University of Science and Technology, Taiyuan, 030024, PR China.
⁵ Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, PR China; University of Chinese Academy of Sciences, 100049, Beijing, PR China. Electronic address: [email protected].

PMID: 36375607
DOI: 10.1016/j.chemosphere.2022.137200

Abstract

The catalytic ozonation-based advanced oxidation process (AOP) is applied to remove nondegradable chemical oxygen demand (COD), while the application in industry is limited by the economics and activity of catalysts. In this study, we demonstrate that by taking atrazine (ATZ) as a model pollutant, the removal rates of catalytic ozonation were negatively correlated with the interlayer water content of metal-modified montmorillonite (M_x@MMT), instead of the loadings metals. Among the modified MMT, Zn_0.1@MMT achieved 83.2% degradation of ATZ within 15 min, and corresponding removal rates of COD and total organic carbon (TOC) reached 40.3% and 46.5%, respectively. Detailed EPR and quenching experiments identified that hydroxyl radicals (HO•) were the main reactive oxygen species and QTOF/MS/MS analysis helped to propose a possible degradation pathway of ATZ. Moreover, the catalytic performance of Zn_0.1@MMT under different conditions was also systematically evaluated.

Keywords: Catalytic ozonation; Interlayer water; Metal-modified montmorillonite.

MeSH terms

Atrazine* / chemistry
Bentonite
Catalysis
Metals
Ozone* / chemistry
Tandem Mass Spectrometry
Water
Water Pollutants, Chemical* / analysis
Water Purification*

Substances

Atrazine
Bentonite
Metals
Ozone
Water
Water Pollutants, Chemical