Sorption Characteristics of Neptunium by Sodium-Smectite.
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概要
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The sorption characteristics of <SUP>237</SUP>Np by sodium-smectite have been studied by batch type sorption-desorption experiments over a pH range of 2 to 8. The association of <SUP>237</SUP>Np with smectite was examined by the sequential extraction technique in which 1 m KCl and 1 Nit HCl solutions were used as the extraction agents. Two kinds of neptunium-smectite association were identified by their characteristic desorption properties. In the first association, neptunium is desorbed from smectite by 1 m KC1. In the second association, neptunium is stable in the basic solution but is desorbed by 1 Ni HC1. The latter association was observed when neptunium was sorbed at low pH. Powder X-ray diffraction showed an expansion of the basal spacing of smectite from 1.25 to 1.48 nm in low pH solutions, consistent with specific sorption of neptunium at a H<SUP>+</SUP> expanded interlayer of smectite.
- 一般社団法人 日本原子力学会の論文
著者
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KOZAI Naofumi
Department of Environmental Sciences, Japan Atomic Energy Research Institute
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Ohnuki Toshihiko
Department Of Environmental Safety Research Japan Atomic Energy Research Institute
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OHNUKI Toshihiko
Department of Environmental Safety Research,Japan Atomic Energy Research Institute
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MURAOKA Susumu
Department of Environmental Safety Research,Japan Atomic Energy Research Institute
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MURAOKA Susumu
Department of Environmental Safety Research, Japan Atomic Energy Research Institute
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