ZHANGLicheng,HOURuiying,LIUChe,et al.Kinetics of Synergistic Removal of SDBS by Nano-TiO2&LDH Adsorption and Photocatalysis[J].China Water & Wastewater,2026,42(9):32-39.
Kinetics of Synergistic Removal of SDBS by Nano-TiO2&LDH Adsorption and Photocatalysis
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第9期
Page:
32-39
Column:
Date of publication:
2026-05-01
- Keywords:
- adsorption; photocatalysis; nano-TiO2&; LDH; sodium dodecylbenzene sulfonate
- Abstract:
- To explore the adsorption and photocatalytic degradation performance and kinetics mechanism of sodium dodecylbenzene sulfonate (SDBS) by nano-TiO2&LDH, TiO2 and composite TiO2&LDH were prepared by sol-gel method and urea hydrothermal method respectively. The materials were characterized by XRD and SEM. The removal mechanism was analyzed through the fitting of dynamic models, and adsorption and photocatalytic experiments. The results showed that the adsorption and photocatalytic efficiency of TiO2&LDH was better than that of TiO2 and LDH alone. The removal rate of dark adsorption reached 42.81% after 30 minutes, significantly higher than that of LDH (31.94%) and TiO2 (19.54%).The adsorption behavior conformed to the quasi-second-order kinetic model and the Langmuir isothermal model, confirming that it was a chemical monolayer adsorption. After 240 minutes of photocatalysis, the total removal rate reached 95.50%. The reaction rate constant (0.009 7 min-1) was 4.6 times and 8.1 times that of TiO2 and LDH, respectively. The free radical capture test confirmed that hydroxyl radical (·OH) was the main active species during the degradation process. Nano-TiO2&LDH achieved efficient degradation of SDBS through the adsorption and photocatalytic synergistic mechanism and demonstrated excellent cycling stability.
Last Update:
2026-05-01