Ultrasonic-assisted H2O2/TiO2 process in catechol degradation: kinetic, synergistic and optimisation via response surface methodology

• Published in: International journal of environmental analytical chemistry Vol. 102; no. 3; pp. 757 - 770
• Main Authors: Yegane Badi, Mojtaba, Vosoughi, Mehdi, Sadeghi, Hadi, Mokhtari, S. Ahmad, Mehralipour, Jamal
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 19.02.2022; Taylor & Francis LLC
• Subjects: Catechol; Chemical oxygen demand; Degradation; Hydrogen peroxide; Kinetics; optimisation; Optimization; Oxidation; Oxidation process; Performance degradation; pH effects; process; Reaction time; Removal; Response surface methodology; Synergistic effect; TiO; Titanium dioxide; Total organic carbon; ultrasonic mechanism; United States > US
• ISSN: 0306-7319; 1029-0397
• DOI: 10.1080/03067319.2020.1726335

This experimental study investigated the performance of Catechol degradation by US/TiO 2 /H 2 O 2 process as an integrated advance oxidation process. In this experimental study, initial pH, dose of TiO 2 , initial concentration of Catechol, H 2 O 2 concentration and reaction time parameters optimised BBD. The results suggest that US/TiO 2 /H 2 O 2 process has a high efficiency in Catechol degradation. Optimum condition of US/TiO 2 /H 2 O 2 process is pH = 3.43, H 2 O 2 concentration = 130 mg/l, TiO 2 dose = 0.34 g/l, Catechol concentration = 12.52 mg/l and reaction time = 70.64 min. According to predicate point, the percentage of Catechol removal in this condition was 96.2 and 92.34 as a predicated and experimental percentage of Catechol removal by this process. The kinetics of reaction follows pseudo-first-order kinetic. The synergist effect of sonolysis, TiO 2 and H 2 O 2 is 2.09 fold. 70 and 63% of initial COD and TOC were removed. Presence of radical scavenger has an adverse impact on the performance of US/TiO 2 /H 2 O 2 process.