Adsorption property of organically modified kieselguhr on polyvinylacetate

作者：Mao, Cui-Ping; Wu, Shu-Bin

来源：Chemistry and Industry of Forest Products, 2014, 34(6): 8-12.

DOI：10.3969/j.issn.0253-2417.2014.06.002

• Cation surfactant
• Correlation coefficient
• Dissolved and colloidal substances
• Kinetic and thermodynamic parameters
• Organic kieselguhr
• Polyvinyl acetates (PVAc)
• Pseudo-second-order kinetic models
• Thermodynamic parameter

The kieselguhr was modified by lignin-based cationic surfactant which was obtained from the Mannich reaction. Modified organic kieselguhr exhibited an excellent adsorption of dissolved and colloidal substances (DCS). In this paper, polyvinylacetate (PVAc) was chosen as the simulacrum of stickies. The effects of PVAc dosages, adsorption time and temperature on adsorption were discussed. Meanwhile, kinetic and thermodynamic parameters were obtained. Correlation coefficient of kinetic model, R2were all beyond 0.99;the thermodynamic parameters ΔS, ΔH were -61.39 J/mol and -12.03 kJ/mol, respectively. The adsorption of PVAc on organic kieselguhr matched with the Langmuir model. The higher temperature was positive for the adsorption process. The adsorption process obeyed the pseudo-second-order kinetic model, and belonged to physical type.

• 出版日期2014-12-28
• 单位华南理工大学