Correlations between pH and glass leaching

Conference · Wed Apr 01 04:00:00 EST 1981

OSTI ID:6468303

Buckwalter, C Q; McVay, G L

The effect of pH on the dissolution of glass constituents from three simple silicate glass compositions and one waste glass during leaching experiments is illustrated. All glasses were leached in modified D.I. water according to the MCC-1 procedure. Leachate analysis was done by ICP and solid state analyses by SEM. The major conclusion is that the mechanism of dissolution is different when comparing a silicate and a borosilicate glass. The borosilicate glasses react more readily in an acid medium, whereas the silicate-based glasses are relatively unreactive. The addition of the rare earths in the waste glass enhance the dissolution of the borosilicate glass in the acid medium. Both borosilicate glasses exhibit greater chemical durability in the high base medium, whereas the silicate glass tends to dissolve.

• Research Organization: Battelle Pacific Northwest Labs., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6468303
• Report Number(s): PNL-SA-9102; CONF-810528-4
• Country of Publication: United States
• Language: English

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BOROSILICATE GLASS
COMPARATIVE EVALUATIONS
DATA
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PH VALUE
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