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Title: Unusual adsorption properties of microporous titanosilicate ETS-10 toward heavy metal lead
Authors: Zhao, G.X.S. 
Lee, J.L.
Chia, P.A. 
Issue Date: 18-Mar-2003
Citation: Zhao, G.X.S., Lee, J.L., Chia, P.A. (2003-03-18). Unusual adsorption properties of microporous titanosilicate ETS-10 toward heavy metal lead. Langmuir 19 (6) : 1977-1979. ScholarBank@NUS Repository.
Abstract: Microporous titanosilicate ETS-10 was synthesized by using TiF4 as the Ti source and characterized by using X-ray diffraction, Fourier transform infrared and Raman spectroscopies, and nitrogen adsorption. The adsorption properties of heavy metal ion Pb2+ on the ETS-10 sample were studied by measuring the adsorption kinetics and equilibria using a batch-type method. It has been observed that the adsorption rate of Pb2+ on ETS-10 is extremely rapid: less than 5 s is required to attain maximum adsorption capacity in a 10 mmol/L solution with a batch factor of 200 mL/g. The kinetic data can be fitted very well by a pseudo-second-order model, whereas the equilibrium data are better fitted to the Langmuir isotherm than to the Freundlich isotherm. The maximum adsorption capacity of Pb2+ on ETS-10 as predicted by the Langmuir equation is 1.12 mmol/g. This is the highest adsorption capacity of Pb2+ on zeolites that has been observed so far.
Source Title: Langmuir
ISSN: 07437463
DOI: 10.1021/la026490l
Appears in Collections:Staff Publications

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