Composites of nanostructured calcium silicate hydrate with superparamagnetic particles and their use in the uptake of copper from solutionMathew J. Cairns A , Giancarlo M. Barassi A and Thomas Borrmann A B C
A School of Chemical and Physical Sciences, Victoria University, PO Box 600, 6140 Wellington, New Zealand.
B Present Address: Othbergstrasse 10, D-37632 Eschershausen, Germany.
C Corresponding author. Email: firstname.lastname@example.org
Environmental Chemistry 11(3) 301-308 http://dx.doi.org/10.1071/EN13183
Submitted: 11 October 2013 Accepted: 1 February 2014 Published: 5 June 2014
Abstract. Composites of magnetite and maghemite with a nanostructured calcium silicate hydrate are generated and used in the sorption of copper from solution. The superparamagnetic components allow use of high gradient separation thereby circumventing the time-consuming recovery of the silicate by filtration. The sorption capacity of the composites is comparable to that of the pure silicate. The ideal ratio of iron oxide to calcium silicate hydrate is identified to be 10 wt % of magnetite or maghemite.
Additional keywords: copper sorption, high gradient magnetic separation, sorption, superparamagnetic composite.
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