Back to Search
Start Over
Removal of Hg2+ ions from aqueous solution by ETS-4 microporous titanosilicate—Kinetic and equilibrium studies
- Source :
-
Chemical Engineering Journal . Aug2009, Vol. 151 Issue 1-3, p247-254. 8p. - Publication Year :
- 2009
-
Abstract
- Abstract: Batch stirred tank experiments were carried out to study the application of ETS-4 microporous titanosilicate for Hg2+ ions removal from aqueous solution. The effect of operational conditions was assessed and it was proved that Hg2+ uptake (%) increases with increasing contact time, increasing ETS-4 mass and decreasing initial Hg2+ concentration. It was confirmed that stirring rate does not affect the Hg2+ removal by ETS-4 as long as it is high enough to break the diffusion resistance. Two simplified models, the pseudo first-order and the pseudo second-order equations, were used to describe the kinetics of the sorption process and better fittings were obtained by the last one. The Bt versus t plots indicated that film diffusion is the rate-limiting step of the removal of Hg2+ by ETS-4. Langmuir, Freundlich and Dubinin–Radushkevich isotherm equations fitted quite well the equilibrium data and the Langmuir maximum capacity of ETS-4 was found to be 246mgg−1 at 21°C. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 151
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 40118126
- Full Text :
- https://doi.org/10.1016/j.cej.2009.02.035