An Innovative Approach To The Synthesis Of Sorbent Materials
For Metal Fixation
Author(s)
O. L. Shtepenko, N. J. Coleman & C. D. Hills
Abstract
An innovative approach to the synthesis of
sorbent materials for metal fixation
0. L. Shtepenko, N. J. Coleman & C. D. Hills
Department of Earth & Environmental Sciences, Natural Resources
Institute, University of Greenwich, UK
Abstract
A new approach has been developed for the synthesis of wastewater treatment
materials from calcareous substrates via the process of accelerated carbonation.
This paper presents results from an investigation of the characterization and
performance testing of carbonated ordinary Portland cement (CASM) as a
sorbent for metal removal. CASM was synthesized by exposing cement to
carbon dioxide gas, at a pressure of 2 bar, in the presence of moisture. The
resulting product had funnel-shaped pores of 30-40W and a specific surface area
of 49m2g-1. The main phases of CASM were crystalline polymorphs of calcium
carbonate, amorphous silicalalumina and unreacted mineral phases. In a sessile
kinetic sorption study CASM demonstrated the following trend in metal uptake
(in mgl
Keywords
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