Anionic radionuclides are known to be hardly immobilized in most minerals and in addition they possess quite long half-life in the order of 105~107 years. In Fukushima Daiichi Nuclear Power Plant (FDNPP) anion exchange resin is utilized to immobilize these oxo-anions like selenate (79SeO42-)/selenite (79SeO32-) in Advanced Liquid Processing System. However, resins are not always suitable to store underground for long years, due to high biodegradability. The technologies for stable storage of anionic radionuclides are strongly desired to develop before decommissioning of the FDNPP reactor. It has been known that hydrocalumite and ettringite are typical anionic exchangers for selenite. However, these matrixes have low chemical stability under low pH conditions. In this study, cancrinite and sodalite were proposed as selenate matrixes, where both matrixes are stable in the wider range of pH.
|Publication status||Published - Jan 1 2017|
|Event||14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017 - Sapporo, Hokkaido, Japan|
Duration: Sep 26 2017 → Sep 29 2017
|Conference||14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017|
|Period||9/26/17 → 9/29/17|
All Science Journal Classification (ASJC) codes
- Environmental Science(all)