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The Effect of Various Lead Species on the Leaching Behavior of Borosilicate Waste Glass

Published online by Cambridge University Press:  26 February 2011

Richard L. lehman  and
Frank A. Kuchinski
Richard L. lehman
Affiliation:
Department of Ceramic Engineering, Rutgers UniversityPO Box 909, Piscataway, NJ 08854
Frank A. Kuchinski
Affiliation:
Department of Ceramic Engineering, Rutgers UniversityPO Box 909, Piscataway, NJ 08854
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Abstract

A borosilicate nuclear waste glass was static leached in pure water, silicate water, and brine solution. Three different forms of lead were included in specified corrosion cells to assess the extent to which various lead species alter the leaching behavior of the glass. Weight loss data indicated that Pbm and Pb0 greatly reduce the weight loss of glass when leached in pure water, and similar effects were noted in silicate and brine. Si concentrations, which were substantial in the glass-alone leachate, were reduced to below detection limits in all pure water cells containing a lead form. Lead concentration levels in the leachate were controlled by lead form solubility and appeared to be a significant factor in influencing apparent leaching behavior. Surface analysis revealed surface crystals, which probably formed when soluble lead in the leachate reacted with dissolved or activated silica at the glass surface. The net effect was to reduce the release of some glass constituents to the leachate, although it was not clear whether the actual corrosion of the glass surface was reduced. Significantly different corrosion inhibiting effects were noted among lead metal and two forms of lead oxide.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 179
Copyright
Copyright © Materials Research Society 1985

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