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Investigating the Leaching Rate of TiTe3O8 Towards a Potential Ceramic Solid Waste Form 원문보기

Journal of nuclear fuel cycle and waste technology = 방사성폐기물학회지, v.18 no.4, 2020년, pp.509 - 516  

Noh, Hye Ran (Korea Atomic Energy Research Institute) ,  Lee, Dong Woo (Korea Atomic Energy Research Institute) ,  Suh, Kyungwon (Korea Atomic Energy Research Institute) ,  Lee, Jeongmook (Korea Atomic Energy Research Institute) ,  Kim, Tae-Hyeong (Korea Atomic Energy Research Institute) ,  Bae, Sang-Eun (Korea Atomic Energy Research Institute) ,  Kim, Jong-Yun (Korea Atomic Energy Research Institute) ,  Lim, Sang Ho (Korea Atomic Energy Research Institute)

Abstract ▼ AI-Helper 아이콘AI-Helper

An important property of glass and ceramic solid waste forms is processability. Tellurite materials with low melting temperatures and high halite solubilities have potential as solid waste forms. Crystalline TiTe3O8 was synthesized through a solid-state reaction between stoichiometric amounts of TiO...

주제어

#Solid waste form   #Solid-state reaction   # $TiTe_3O_8$   #Leaching rate   #Chemical durability  

AI 본문요약
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* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

제안 방법

  • After the leaching experiments, scanning electron microscopy (SEM) analyses were conducted on the pelletized samples using a JEOL JSM-6610LV scanning electron microscope to investigate any harmful effects on the crystalline structures and surface morphologies. XRD analysis was also performed for the pelletized samples after leaching under the same operating conditions as those for the powder samples.
  • In this study, a chemical durability test was conducted based on the protocol described by ASTM C1220-17 [12] with some minor modifications of the experimental conditions. We identified the Ti4+-Te4+-oxide system for the immobilization of radioactive waste.
  • In the DSC analysis, an endothermic peak was observed at 820℃, which indicates the melting of TiTe3O8. To investigate the chemical behavior introduced by the TeO2 volatilization on the TiTe3O8 melt, XRD patterns measured at room temperature were compared after heat treatments at different temperatures up to the volatilization temperature. Fig.
  • 1 s. To investigate the thermal effects, the powder samples were heated at a rate of 10℃·min-1 up to the three different target temperatures of 300, 600, and 900℃. Each target temperature was maintained for 10 min and subsequently cooled to room temperature to measure the powder XRD patterns.

대상 데이터

  • TiO2 (Showa, 99.0%) and TeO2 (Aldrich, 99.0%) were used as purchased without further purification. Stoichiometric amounts of TiO2 and TeO2 were thoroughly ground together in an agate mortar and pestle.

이론/모형

  • The static leaching test method described by ASTM C1220-17 using deionized water was used to test the chemical durability of pelletized TiTe3O8 samples. High-purity deionized water is one of the most frequently employed aqueous solvents for leaching, as the appropriate pH and salt compositions of the aqueous leaching solution can be manipulated to simulate the specific groundwater conditions at the disposal sites.
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참고문헌 (26)

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