Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16007
Title: Transfer mechanisms of contaminants in cement-based stabilized/solidified wastes
Authors: Qiao, XC
Poon, CS 
Cheeseman, CR
Keywords: Chemical stabilization/solidification
Hazardous waste
Leaching
Issue Date: 2006
Publisher: Elsevier
Source: Journal of hazardous materials, 2006, v. 129, no. 1-3, p. 290-296 How to cite?
Journal: Journal of hazardous materials 
Abstract: Stabilization/solidification (S/S) processes are routinely used for the final treatment of hazardous wastes prior to land disposal. Cement-based binder systems with partial replacement of cement by pulverized fuel ash (PFA) are common. In order to predict the long-term leaching characteristics of S/S wastes, it is important to understand the leaching mechanism. This paper presents experimental results from a study that has investigated the leaching behaviour of contaminants from cement-based S/S waste forms. A novel radial leach test (RLT) has been used to study the migration of heavy metals. The results show that contaminants migrate from the inner core of the S/S waste during leaching to the sample surface and accumulate near the edge of the S/S waste. The degree of accumulation is related to the contaminant species and the Ca(OH)2 content.
URI: http://hdl.handle.net/10397/16007
ISSN: 0304-3894
EISSN: 1873-3336
DOI: 10.1016/j.jhazmat.2005.09.029
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