DaiXinyi,YuTian,ZhouQiaoling,et al.Synergistic Mechanism and Degradation Pathways for Levofloxacin Degradation by Tourmaline?modified TiO2[J].China Water & Wastewater,2026,42(13):18-25.
Synergistic Mechanism and Degradation Pathways for Levofloxacin Degradation by Tourmaline?modified TiO2
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第13期
Page:
18-25
Column:
Date of publication:
2026-07-01
- Keywords:
- levofloxacin hydrochloride; photocatalysis; tourmaline; titanium dioxide (TiO2); reaction mechanism
- Abstract:
- A novel tourmaline-modified TiO2 composite (TMA-Ti) was synthesized via the sol-gel method. The performance of TMA-Ti and its synergistic mechanism on levofloxacin hydrochloride (LVFX) degradation in aqueous solution were systematically investigated by experiments and comprehensive characterizations. The results indicated that under the initial LVFX concentration of 20 mg/L, a catalyst dosage of 0.25 g/L, and 1 h integrated adsorption-photocatalysis reaction, a LVFX removal rate of 62% was achieved by the TMA-Ti composite, demonstrating superior performance over pure TiO2 or tourmaline. The enhanced performance of the composite could be attributed to the synergistic effect between tourmaline and TiO2. On the basis of scavenging experiments and intermediate analysis, it was proposed that LVFX degradation occurred through decarboxylation, defluorination, C—N bond cleavage, and demethylation. The process culminated in the mineralization of LVFX to CO2, H2O, and low molecular weight compounds. The TMA-Ti composite maintained a high regeneration rate (>85%) even after multiple reaction cycles, confirming its great potential in the advanced treatment of refractory antibiotic wastewater.
Last Update:
2026-07-01