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Citation: ZHANG Chun-Li, REN Guang-Jun, SONG En-Jun, WANG Xin. Adsorption of Alizarin Red on TiO₂Pillared Bentonite in Aqueous Solution[J]. Chinese Journal of Applied Chemistry, ;2006, 23(3): 305-308. shu

Adsorption of Alizarin Red on TiO₂Pillared Bentonite in Aqueous Solution

1.
School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110168

Corresponding author: ZHANG Chun-Li,
Received Date: 20 April 2005
Available Online: 12 September 2005
Fund Project: 沈阳市高科技创业种子基金资助项目(04Z029) (04Z029)

TiO₂ pillared bentonite and yttrium doped TiO₂ pillared bentonite were prepared respectively by the sol-gel method from bentonite with TiO₂ gelation and yttrium doped TiO₂ gelation.They were characterized by XRD and the interlayer distance of them obviously increased to 1.9 nm or more and remained at 1.8 nm or more after 500℃ calcinations.The adsorptions of alizarin red on four TiO₂ pillared bentonite samples were also studied.The results show that the speed and adsorbability of alizarin red dye on four TiO₂ pillared bentonites are much higher.The adsorption dynamics follows the laws of Bangham and Langmuir.The relationship between adsorbing capacity(q_e) and equilibrium mass concentration(ρ_e) is in accordance with the isothermal adsorption equations of Freundlich and Langmuir.The adsorptions are all endothermic process.The adsorption heat values range from 20 kJ/mol to 23 kJ/mol.The absorption exhibits both surface physical adsorption and ion-exchange mechanism.
- pillared bentonite,
- adsorption,
- alizarin red,
- kinetics,
- thermodynamics
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Adsorption of Alizarin Red on TiO2Pillared Bentonite in Aqueous Solution

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Adsorption of Alizarin Red on TiO₂Pillared Bentonite in Aqueous Solution