Kinetic dissolution of phosphate glasses containing toxic heavy metals
Language
en
Article de revue
This item was published in
Journal of Non-Crystalline Solids. 2003, vol. 331, n° 1-3, p. 228-239
Elsevier
English Abstract
The dissolution kinetics of a series of phosphate glasses with the compositions 50P2O5–15ZnO–(35−x)PbO–xCdO (x=20 and 35) and (100−y)[50P2O5–15ZnO–15PbO–20CdO]–yAl2O3 (y=6 and 8) have been studied in aqueous solution. The ...Read more >
The dissolution kinetics of a series of phosphate glasses with the compositions 50P2O5–15ZnO–(35−x)PbO–xCdO (x=20 and 35) and (100−y)[50P2O5–15ZnO–15PbO–20CdO]–yAl2O3 (y=6 and 8) have been studied in aqueous solution. The dissolution process of aluminium free metaphosphate glasses is interpreted as hydration of glass surface with a congruent dissolution for x=35 and controlled by both mechanisms with incongruent dissolution for x=20. The addition of Al2O3 in metaphosphate glass (x=20) considerably improves the corrosion resistance...Read less <
English Keywords
Phosphate glasses
Heavy metal
Toxicity
Kinetic dissolution
Origin
Hal imported