The effect of interlayer water of metal-modified montmorillonite for catalytic ozonation.
Chemosphere
; 312(Pt 1): 137200, 2023 Jan.
Article
em En
| MEDLINE
| ID: mdl-36375607
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 (Mx@MMT), instead of the loadings metals. Among the modified MMT, Zn0.1@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 (HOâ¢) 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 Zn0.1@MMT under different conditions was also systematically evaluated.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ozônio
/
Atrazina
/
Poluentes Químicos da Água
/
Purificação da Água
Idioma:
En
Revista:
Chemosphere
Ano de publicação:
2023
Tipo de documento:
Article