Adsorption of Methylene Blue from Aqueous Solution by Anionic Surfactant Modified Montmorillonite
Sodium stearate modified montmorillonite(SSTA-MMT) is prepared by using the anion surfactant sodium stearate, and its structure is characterized by X-ray and FI-IR diffraction. The results show that sodium stearate can be intercalated into the interlayers of montmorillonite and the layer spacing is expanded from 12.74 to 48.05 Å with the loading concentration of sodium stearate increasing from 5 % to 100 % CEC of Na-MMT. The adsorption of methylene blue onto SSTA-MMT experiments show that the adsorption kinetic of methylene blue onto SSTA-MMT can be best described by the pseudo-second-order model and that the adsorption isotherm of methylene blue is in good agreement with the Langmuir equation.
Jinsheng Liang and Lijuan Wang
D. M. Chen et al., "Adsorption of Methylene Blue from Aqueous Solution by Anionic Surfactant Modified Montmorillonite", Advanced Materials Research, Vol. 178, pp. 29-34, 2011