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Type: Journal article
Title: Effects of progressive carbonation on heavy metal leaching from cement-bound waste
Author: Van Gerven, T.
Cornelis, G.
Vandoren, E.
Vandecasteele, C.
Garrabrants, A.
Sanchez, F.
Kosson, D.
Citation: AIChE Journal, 2006; 52(2):826-837
Publisher: Amer Inst Chemical Engineers
Issue Date: 2006
ISSN: 0001-1541
Statement of
T. Van Gerven, G. Cornelis, E. Vandoren, C. Vandecasteele, A. C. Garrabrants, F. Sanchez and D. S. Kosson
Abstract: <jats:title>Abstract</jats:title><jats:p>Contradictory leaching results from carbonated cement‐bound wastes have been reported in various investigations. However, the degree of carbonation of the examined samples is rarely considered as an important parameter in leaching results. This article focuses on the effect of progressive carbonation on leaching properties of cement‐bound waste (bottom ash or flue gas cleaning residue), including uncarbonated, partially carbonated, and almost completely carbonated samples. Leaching is investigated after carbonation by means of semi‐dynamic leaching of monoliths, supported by batch solubility and release measurements on particle‐size reduced material. For partially carbonated samples, leaching of metals is in most cases less than observed from uncarbonated samples, resulting from the conversion of hydroxides to carbonates. For completely carbonated samples, increased leaching of most metals was observed in comparison to partially carbonated samples, resulting from leachate induced transformation of carbonate into more soluble bicarbonate speciation. © 2005 American Institute of Chemical Engineers AIChE J, 2006</jats:p>
Keywords: leaching
heavy metals
DOI: 10.1002/aic.10662
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Appears in Collections:Aurora harvest 5
Earth and Environmental Sciences publications

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