Citation: Liang Yaqin, Zhang Xiaoyan, Yan Yundong, Yang Wenzhuo, Zhou Lihua. Preparation of Organo-Montmorillonites Modified by Gemini Surfactants and Their Adsorption Capabilities for Methyl Orange[J]. Chemistry, ;2016, 79(12): 1178-1183. shu

Preparation of Organo-Montmorillonites Modified by Gemini Surfactants and Their Adsorption Capabilities for Methyl Orange

1.
Department of Chemistry, Changzhi College, Changzhi 046000

Received Date: 23 June 2016
Available Online: 6 August 2016
Fund Project:

Organo-montmorillonites 12-2-12-MMT and 16-2-16-MMT were prepared by two modification treatment of cationic Gemini surfactants 1,2-bis(dodecyldimethylammonio)ethanedibromide(12-2-12) and 1,2-bis(cetyldimethylammonio) ethanedibromide (16-2-16). The modified samples were characterized by XRD, FT-IR and TG-DTG, and the results showed that the surfactants had inserted into the lamella of montmorillonite successfully, the interlayer spacer increased with the increasing of the cationic exchange capacity (CEC) of surfactants and the chain length. The adsorption experiments of methyl orange onto organo-montmorillonite were studied using batch method as a function of the concentration of surfactants, contact time, temperature and pH. The optimal conditions for methyl orange adsorption were 1.0 CEC of MMT, 20℃, pH 3, and contact time 6 h. The adsorption capability of 16-2-16-MMT was better than that of 12-2-12-MMT. The kinetic data were better described by the pseudo-second order kinetics model. The adsorption isotherm was in good agreement with the Langmuir model.
- Organo-montmorillonite,
- Gemini surfactant,
- Methyl orange,
- Adsorption
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沈阳化工大学材料科学与工程学院沈阳 110142