Author/Authors :
Sepehrian، Hamid نويسنده NFCRS, Nuclear Science and Technology Research Institute, AEOI , P.O. Box 11365/8486, Tehran, Iran , , Cheraghali، Ramin نويسنده Chemistry Department, Islamic Azad University, Saveh Branch, Saveh, Iran. , , Rezaei، Peyman نويسنده Chemistry Department, Islamic Azad University, Saveh Branch, Saveh, Iran. , , Abdi، Hojjat Allah نويسنده Chemistry Department, Islamic Azad University, Saveh Branch, Saveh, Iran. ,
Abstract :
In this paper, nanoporous MCM-41 has been modified by incorporation of aluminum ion as a rapid, simple and inexpensive method for modification. The adsorbent is characterized using powder X-ray diffraction and nitrogen adsorption-desorption isotherm data. The distribution coefficient of lanthanum ion on the nanoporous aluminosilicates has been enhanced with the increase of the aluminum in the framework of the adsorbent. Adsorption behavior of lanthanum on the Al10MCM-41 adsorbent has been studied and the Langmuir, Freundlich and Redlich-Peterson isotherms were applied to represent the adsorption process. Langmuir isotherm fits the experimental data quite well. The effects of pH and shaking time have also been studied by batch method. The adsorption capacity is very high in the pH range of 3-8 and decreases with decreasing of the pH value. The adsorption of lanthanum onto Al10MCM-41 follows pseudo-second-order kinetics.
