11 Å tobermorite ion exchanger from recycled container glass. (26th September 2011)

• Record Type: Journal Article
• Authors: Coleman, Nichola J.
• Is Part Of: International journal of environment and waste management. Volume 8:Number 3/4(2011)
• Page Start: 366
• Page End: 382
• Publication Date: 2011-09-26
• Subjects: sorbent -- hydrothermal synthesis -- cullet -- recycling -- ion exchange -- calcium silicate -- pseudo-second-order kinetic model; Refuse and refuse disposal -- Environmental aspects -- Periodicals; Refuse collection -- Environmental aspects -- Periodicals; Recycling (Waste, etc.) -- Periodicals; 363.72805
• Languages: English
• ISSNs: 1478-9876

Abstract

Waste container glass cullet has been evaluated as a feedstock material for the hydrothermal synthesis of tobermorite, a cation exchanger. Accordingly, it is demonstrated that essentially phase-pure 11 Å tobermorite, Ca5 Si6 O16 (OH)2 · 4H2 O, can be obtained from a stoicheiometrically-adjusted mixture of waste glass cullet and calcium oxide in aqueous sodium hydroxide at 100ºC. A batch sorption study indicated that the cullet-derived tobermorite is highly effective in the removal of Pb 2+ (1.66 mmol g –1 ) and Cd 2+ (0.48 mmol g –1 ) from solution. Its ion exchange characteristics are compared with those of other waste-derived sorbents and potential applications are discussed.