Study of mineralogy and leaching behavior of stabilized/solidified sludge using differential acid neutralization analysis: Part I: Experimental study / O. Peyronnard in Cement and concrete research, Vol. 39 N° 7 (Juillet 2009)  

Study of mineralogy and leaching behavior of stabilized/solidified sludge using differential acid neutralization analysis: Part I: Experimental study [texte imprimé] / O. Peyronnard, Auteur ; M. Benzaazoua, Auteur ; Blanc, André, Auteur . - 2009 . - pp. 600–609.
Génie Civil
Langues : Anglais (eng)
in Cement and concrete research > Vol. 39 N° 7 (Juillet 2009) . - pp. 600–609

Mots-clés :	Waste management  Characterization  Stability  Fly ash  Portland cement
Résumé :	In this work, differential acid neutralization analysis, chemical analysis of selected leachates and mineralogical study (XRD and SEM-EDS) are combined to investigate the relationship between mineralogy and leaching behavior of hydroxide sludge doped in Zn and Cr stabilized/solidified by hydraulic binders. The leaching behavior of stabilized hydroxide sludge is controlled by the dissolution of portlandite (pH ~ 12) followed by the dissolution of AFt/AFm and hydrogarnets (pH between 12 and 10) and finally the dissolution of ettringite and of the siliceous matrix of C–S–H (pH The proposed combination of tests is highly pertinent to establish the links between mineralogy and leaching behavior. Nevertheless, the hypotheses formulated are insufficient to implement a behavioral model to describe the leaching behavior.
ISSN :	0008-8846
En ligne :	http://www.sciencedirect.com/science/article/pii/S0008884609000751