Analysis of tetramethylammonium–montmorillonite and retention of toluene from aqueous solution

VIDAL, NURIA CAROLINA, VOLZONE CRISTINA.

APPLIED CLAY SCIENCE

Elsevier Science Publishers B.V

Lugar: Amsterdam; Año: 2009 vol. 45 p. 227 - 231

0169-1317

Non-ionic 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 characterized 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 500 °C. 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.–montmorillonites were prepared by ion-exchange and used to evaluate toluene uptake from water. The TMA–montmorillonites were characterized 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 500 °C. 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.–montmorillonites were characterized 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 500 °C. 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.–visible spectrophotometry. The thermal stability of the TMA–montmorillonites decreased as TMA addition increased; the total mass loss decreased with increasing temperature up to 500 °C. 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.–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.−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.–montmorillonites increased from 0.2 to 0.22 mg g−1 mainly to interlayer adsorption. The adsorption of toluene influenced the OH-stretching vibration.fluenced the OH-stretching vibration.