On Iron Enrichment on Nuclear Waste Glass During Leaching

Abstract

Static leach tests were carried out on a nuclear waste glass (SRL-165) at two different SA/V-ratios of 0.85cm^-1 and 0.079cm^-1 at 90°C. Fourier transform infra-red reflection spectroscopy revealed that Fe tended to precipitate on the surface of the glass when leached at 0.079cm^-1, 90°C for more than 14 days. X-ray photoelectron spectroscopy indicated that Fe which precipitated on the specimen surface was a mixture of Fe²⁺ and Fe³⁺; the ratio of Fe²⁺/Fe³⁺ would be determined by the redox conditions of surrounding water.