This study reports the experimental results concerning the adsorption of methyl-tert-butyl-ether (MTBE, C5H12O) from water in the pores of siliceous zeolite ferrierite (FER) by combining X-ray powder diffraction analyses and chromatography techniques. Rietveld structure refinement (Immm space group) highlithed the presence of two crystallographically independent MTBE sites located in the 10-ring channel parallel to [001] direction (MTBE1), and in the ferrierite cage (MTBE2), respectively. On the whole, Rietveld refinement clearly revealed the incorporation of about 1.8 MTBE molecules per unit cell, in very good agreement with the weight loss given by TG analyses and with the saturation capacity determined by the adsorption isotherms. The rapid kinetic combined with the good adsorption capacity suggested that FER can be usefully used as adsorbent medium to remove this emerging organic contaminant from water.
Adsorption and location of methyl tertiary butyl ether onto organophilic ferrierite: a diffractometric, thermogravimetric and gas chromatographic study
MARTUCCI, Annalisa;PASTI, Luisa;SARTI, Elena;
2013
Abstract
This study reports the experimental results concerning the adsorption of methyl-tert-butyl-ether (MTBE, C5H12O) from water in the pores of siliceous zeolite ferrierite (FER) by combining X-ray powder diffraction analyses and chromatography techniques. Rietveld structure refinement (Immm space group) highlithed the presence of two crystallographically independent MTBE sites located in the 10-ring channel parallel to [001] direction (MTBE1), and in the ferrierite cage (MTBE2), respectively. On the whole, Rietveld refinement clearly revealed the incorporation of about 1.8 MTBE molecules per unit cell, in very good agreement with the weight loss given by TG analyses and with the saturation capacity determined by the adsorption isotherms. The rapid kinetic combined with the good adsorption capacity suggested that FER can be usefully used as adsorbent medium to remove this emerging organic contaminant from water.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
