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Geopolymer matrices for immobilization of toxic waste

AuthorsPalomo, Ángel; García-Lodeiro, Inés; Maltseva, O.; Fernández-Jiménez, Ana
KeywordsAlkali activated cement
Geopolymer matrices
Toxic wastes
Issue Date2019
PublisherUniversidad Miguel Hernández de Elche
CitationVitrogeowastes (extension TC05) ICG: Vitrificacion and geopolymerizarion of waste for immobilizarion or recycling: 213-238 (2019)
AbstractGeopolymer technology has been recognized to be effective in the immobilization of toxic wastes since long time ago. In this chapter, after supplying a brief and general overview of the inertization techniques applied to wastes, a wide description is carried out on the effect of alkali activation process (geopolymer formation) on differentmetals fixation. Pb, As, Cr, Hg, B and Cs, are sorne of the elements which have been investigated in relation to the leaching capacity within some different geopolymer matrices. As a general rule, geopolymer matrices, due to the fact that they are formed under strong alkaline conditions, generate an optimal chemical environment for the precipitation of very insoluble phases. Additionally, many low porosity geopolymer matrices can be developed. These two circumstances efficiently help to impede the leaching of many toxic metals when trapped into the geopolymer matrix.
DescriptionCapítulo 7.
Identifiersisbn: 978-84-16024-78-0
Appears in Collections:(IETCC) Libros y partes de libros
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