Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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The Effects of pH and Buffer Materials on the Leaching of Simulated Waste Glass

  • Kim, S.S. (Korea Atomic Energy Research Institute) ;
  • Kim, J.G. (Korea Atomic Energy Research Institute) ;
  • Kim, J.S. (Korea Atomic Energy Research Institute) ;
  • Chun, K.S. (Korea Atomic Energy Research Institute) ;
  • Lee, G.H. (Chung Nam University Department of Chemistry)
  • Published : 1998.02.01
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Abstract

Effects of pH, bentonite and Portland cement on the leaching of the simulated waste glass were investigated. The simulated waste glass showed the low leach rate in the neutral pH region, while the leach rate in both acidic and alkaline regions increased. Addition of bentonite to the leachant enhanced the leaching of the waste glass. When the waste glass was leached at 72$^{\circ}C$ for 36 days in the ground water with gel state Na-bentonite, approximately 2.2${\mu}{\textrm}{m}$ of the surface was corroded out and the large amount of Ti, Nd, and Zr was observed on the surface. The amount of B leached from the simulated waste glass in the presence of domestic bentonite was about three times higher than that in the presence of Aldrich bentonite as well as Portland cement.

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