Skip navigation

Calcium silicate sorbent from secondary waste ash: Heavy metals-removal from acidic solutions

Calcium silicate sorbent from secondary waste ash: Heavy metals-removal from acidic solutions

Warning

Notice of Repository Upgrade

Greenwich Academic Literature Archive will be being upgraded between 16:00 18th February and 10:00 20th February. During this time user login will be disabled but publications will still be accessible for download, except for one or two brief periods.

We apologise for any inconvenience. Please contact gala@gre.ac.uk for more information.

Coleman, N. J., Brassington, D. S., Raza, A. and Lee, W. E. (2006) Calcium silicate sorbent from secondary waste ash: Heavy metals-removal from acidic solutions. Environmental Technology, 27 (10). pp. 1089-1099. ISSN 0959-3330 (Print), 1479-487X (Online) (doi:10.1080/09593332708618724)

Full text not available from this repository.

Abstract

The layer lattice, ion-exchange material, Al-substituted 11 angstrom tobermorite, has been synthesised via an alkaline hydrothermal route from a secondary waste ash arising from newsprint recycling. The hydrogarnet, katoite (Ca3Al2SiO12H8), was also formed. Batch sorption analyses have confirmed that the Al-substituted 11 angstrom tobermorite-bearing product is an effective sorbent for Co2-, Cd2- and Zn2- ions from acidified aqueous media. Kinetic sorption data were analysed in accordance with the pseudo-first- and pseudo-second-order models and steady state data were fitted to the Langmuir and Freundlich isotherms. The Langmuir and pseudo-second-order models provided the most appropriate descriptions of the sorption processes. The maximum uptake capacities for Co2+, Cd2+ and Zn2+ at 20 degrees C were found to be 10.47, 2.92 and 3.09 mg g(-1), respectively, and the respective apparent pseudo-second-order rate constants were estimated to be 5.08 x 10(-3), 1.10 x 10(-3) and 1.13 x 10(-3) g mg(-1) min(-1).

Item Type: Article
Uncontrolled Keywords: Tobermorite, Pseudo-second-order model, Langmuir isotherm, adsorption, Kinetics, Steady state
Faculty / Department / Research Group: Faculty of Engineering & Science
Last Modified: 14 Oct 2016 09:28
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/11798

Actions (login required)

View Item View Item