Effect of iron on waste-glass leaching

Journal Article · Tue Mar 01 04:00:00 EST 1983 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1983.tb10010.x· OSTI ID:6417552

McVay, G L; Buckwalter, C Q

The interactive effects between ductile iron and PNL 76-68 borosilicate glass were investigated as a function of time in 90/sup 0/C static deionized, tuff, and basalt groundwaters. A synergistic effect occurs between the two materials, i.e. iron enhances glass dissolution and glass enhances iron corrosion. An iron silicate precipitate forms, part of which is colloidal in nature. This precipitate effectively removes many of the elements from solution and therefore inhibits the saturation effects which normally cause decreases in elemental removal rates. Thus, the effects of initial solution composition on the glass leach rates are significantly reduced and the relatively high early leach rates normally observed in deionized water are maintained for longer times due to the suppression of saturation effects. This results in more total elemental removal from the glass in all of the groundwaters evaluated. The precipitate and its colloidal form require further characterization.

• Research Organization: Battelle Pacific Northwest Labs., Richland, WA
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6417552
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 66:3; ISSN JACTA
• Country of Publication: United States
• Language: English

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BOROSILICATE GLASS
CHEMICAL REACTIONS
CORROSION
DISSOLUTION
ELEMENTS
GLASS
GROUND WATER
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN COMPOUNDS
IRON
LEACHING
MATERIALS
METALS
OXYGEN COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
SYNERGISM
TRANSITION ELEMENTS
WASTES
WATER