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11 Å tobermorite ion exchanger from recycled container glass
by Nichola J. Coleman
International Journal of Environment and Waste Management (IJEWM), Vol. 8, No. 3/4, 2011


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, Ca5Si6O16 (OH) 2 · 4H2O, 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 Pb2+ (1.66 mmol g-1) and Cd2+ (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.

Online publication date: Fri, 23-Sep-2011


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