CETMIC   05378
CENTRO DE TECNOLOGIA DE RECURSOS MINERALES Y CERAMICA
Unidad Ejecutora - UE
artículos
Título:
Analiysis of tetramethylammonium-montmorillonite and retention of toluene from aqueous solution
Autor/es:
N. VIDAL, C.VOLZONE
Revista:
APPLIED CLAY SCIENCE
Editorial:
Elsevier
Referencias:
Lugar: The Netherlands; Año: 2009 vol. 45 p. 227 - 231
ISSN:
0169-1317
Resumen:
Nonionic organic contaminants, such as toluene, can be effectively absorbed by organo-montmorillionite. The tetramethylammonium (TMA)-montmorillonites were prepared by ion-exchange and used to evaluate toluene uptake from water. The TMA-montmorillonites were characterised by total organic carbon determinations, swelling index, X-ray diffraction, thermal analyses, and infrared spectroscopy. Toluene adsorption was measured by UV-visible spectrophotometry. The thermal stability of the TMA-montmorillonites decreased as TMA addition increased; the total mass loss decreased with increasing temperature up to 500ºC. The amount of carbon retained by the TMA-montmorillonites was proportional to the area of the infrared band at 1488 cm-1 (asymmetric C-H bending vibration of –CH3 group). The retention of toluene by TMA-montmorillonites increased from 0.2 to 0.22 mg g-1 mainly to interlayer adsorption. The adsorption of toluene influenced the OH-stretching vibration.