Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/176930
Title: Incorporation of calcium in glasses: a key to understand the vitrification of sewage sludge.
Author: Tarragó Aymerich, Mariona
Royo, I.
Martínez Manent, Salvador
Garcia Vallès, Maite
Neuville, D.R.
Keywords: Basalt
Cristal·lització
Vidre
Basalt
Crystallization
Glass
Issue Date: 22-Mar-2021
Publisher: Wiley
Abstract: The quantity of sewage sludge generated daily by wastewater treatment plants represents a major environmental problem and a financial burden for plant operators. Valorization strategies focusing on reusing sewage sludge as a raw material are currently developed. Vitrification can help us reduce the volume of waste and binds the components in the structure of chemically stable glasses and glass‐ceramics. In this study, the vitrification of sewage sludge inside a basaltic rock has been simulated by producing glasses and a glass‐ceramic from basalt enriched in calcium that lie between the stability fields of pyroxene and melilite in the system CaO‐MgO‐SiO2‐Al2O3. CaO addition causes the oxidation of the melt at above the liquidus, increases the crystallization temperature, decreases the melting temperature and improves the microhardness of the glasses Glass‐ceramic processes improves the properties of the Ca‐doped basalt glass. The microhardness of the glass (8.2 GPa) and the glass‐ceramic (8.6 GPa) and leaching tests (in the ppb range) place both the glass and the glass‐ceramics at the high end of the mechanical properties and chemical resistance of ceramic tiles for the building industry.
Note: Versió postprint del document publicat a: https://doi.org/10.1111/ijag.15920
It is part of: International Journal of Applied Glass Science, 2021
URI: http://hdl.handle.net/2445/176930
Related resource: https://doi.org/10.1111/ijag.15920
ISSN: 2041-1286
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

Files in This Item:
File Description SizeFormat 
711836.pdf21.37 MBAdobe PDFView/Open    Request a copy


Embargat   Document embargat fins el 22-3-2022


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.