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.
纳米TiO2&LDH吸附-光催化协同去除SDBS动力学
- Title:
- Kinetics of Synergistic Removal of SDBS by Nano-TiO2&LDH Adsorption and Photocatalysis
- Keywords:
- adsorption; photocatalysis; nano-TiO2&; LDH; sodium dodecylbenzene sulfonate
- 摘要:
- 为探究纳米TiO2&LDH对十二烷基苯磺酸钠（SDBS）的吸附和光降解性能及动力学机制，通过溶胶凝胶法和尿素水热法制备TiO2及复合材料TiO2&LDH，采用XRD、SEM对材料进行表征，通过动力学模型拟合，并结合吸附与光催化试验分析降解机理与去除效果。结果表明，TiO2&LDH的吸附与光催化效能比单独的TiO2和LDH更佳。暗吸附30 min去除率达42.81%，显著高于LDH（31.94%）与TiO2（19.54%），吸附符合准二级动力学模型和Langmuir等温模型，证实其为化学单层吸附。光催化240 min后总去除率达95.50%，其反应速率常数（0.009 7 min-1）分别为TiO2和LDH的4.6倍和8.1倍。自由基捕获试验证实羟基自由基（·OH）为降解过程中的主要活性物种。纳米TiO2&LDH通过吸附与光催化协同机制实现SDBS的高效降解，并具有良好的循环稳定性。
- 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.
相似文献/References:
[1]王盼新,郦歆飞,王昀鹏,等.二价铁活化过二硫酸盐对As(Ⅲ)的去除效能与机理[J].中国给水排水,2020,36(23):14.
WANG Pan-xin,LI Xin-fei,WANG Yun-peng,et al.Removal Efficiency and Mechanism of As(Ⅲ) by Ferrous Activated Peroxydisulfate[J].China Water & Wastewater,2020,36(9):14.
[2]何林娟,邹康兵,盛云鸽,等.预处理对东江原水超滤过程中膜污染的控制作用[J].中国给水排水,2021,37(1):16.
HE Lin-juan,ZOU Kang-bing,SHENG Yun-ge,et al.Control Effect of Pretreatment on Membrane Fouling during Ultrafiltration of Dongjiang River Raw Water[J].China Water & Wastewater,2021,37(9):16.
[3]郭晓婧,张志毅,郭掌珍,等.DDTC改性磁性纳米Fe3O4对水中镉的吸附行为[J].中国给水排水,2021,37(9):57.
GUO Xiao-jing,ZHANG Zhi-yi,GUO Zhang-zhen,et al.Absorption Behavior of Cadmium in Aqueous Solution by DDTC Modified Magnetic Nano-Fe3O4[J].China Water & Wastewater,2021,37(9):57.
[4]胡波,周奥,牛慧斌,等.香蒲根富Fe生物炭制备及其光催化降解有机污染物[J].中国给水排水,2022,38(15):55.
HUBo,ZHOUAo,NIUHui-bin,et al.Preparation of Fe?enriched Biochar from Typha Orientalis Presl Root and Its Photocatalytic Degradation of Organic Pollutants[J].China Water & Wastewater,2022,38(9):55.
[5]谭凤训,陈永凯,王榕,等.g-C3N4/PDS光催化降解阿特拉津的效能及机理研究[J].中国给水排水,2023,39(1):91.
TANFeng-xun,CHENYong-kai,WANGRong,et al.Performance and Mechanism of g-C3N4/PDS for Photocatalytic Degradation of Atrazine[J].China Water & Wastewater,2023,39(9):91.