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Immobilization of Pb in a Geopolymer Matrix.
- Source :
-
Journal of the American Ceramic Society . Sep2005, Vol. 88 Issue 9, p2586-2588. 3p. - Publication Year :
- 2005
-
Abstract
- In a geopolymer matrix prepared by mixing a metakaolinite precursor with a solution of potassium hydroxide and silicate, 1 wt% Pb as the nitrate has been immobilized. Under the United States Environmental Protection Agency test protocol the Pb release was less than 5 ppm, the acceptable limit for landfills in the U.S.A. Electron microscopy showed Pb was present in the major amorphous phase and a minor (∼1 vol%) Ca-rich potassium silicate phase. Heating cured samples to several hundred degrees Centigrade was not significantly advantageous for immobilizing Pb. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 88
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 17934586
- Full Text :
- https://doi.org/10.1111/j.1551-2916.2005.00438.x