著者

三村 均 福森 充 大谷 登蔵 菅野 卓治 Hitoshi MIMURA Mitsuru FUKUMORI Tozo OTANI Takuji KANNO 東北大学選鉱製錬研究所 東北大学工学部原子核工学科:(現)日本データスキル株式会社 東北大学大学院工学研究科:(現)日揮株式会社 東北大学選鉱製錬研究所

出版者

東北大學選鉱製錬研究所

雑誌

東北大學選鑛製錬研究所彙報 = Bulletin of the Research Institute of Mineral Dressing and Metallurgy, Tohoku University (ISSN:0040876X)

巻号頁・発行日

vol.35, no.1, pp.19-26, 1979-09-22

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The distribution of cesium ion and the properties of ion exchange was studied in various kinds of zeolites, i.e. synthetic mordenite, natural mordenites and clinoptilolites. The distribution coefficients of cesium (K_<Cs>) exceeded 10^3 even in acidic region (pH~1), though the K_<Cs> values somewhat decreased with increasing acidity. The dynamic properties of ion exchange were examined by zeolite-column process and the break-through curves were obtained at different flow conditions. The break-through capacity, the total capacity and the column utilization increased with the increase in column temperature and with the decrease in the flow rate. Heat treatment resulted in an increase in the strength of zeolites, which was desirable for handling them. The zeolites heated at 300℃ and 500℃ increased in their total capacity of ion exchange of Cs and the granulated zeolites heated at 500℃ improved in its exchange rate and column utilization.

著者

菅野 卓治 橋本 裕之 大谷 登蔵

出版者

東北大学

雑誌

東北大學選鑛製錬研究所彙報 (ISSN:0040876X)

巻号頁・発行日

vol.34, no.1, pp.53-57, 1978-09-16

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The ion-exchange properties of cesium and strontium into zeolite from sodium salt solution has been studied in zeolite A, zeolite X, zeolite Y, mordenite and clinoptilolite. The distribution of cesium into mordenite from about 1〜2 M sodium chloride and sodium hydroxide solutions is considerably larger than that into zeolite A. The distribution coefficient for 2 M solution of sodium salts was about 300. Therefore, the seperation of cesium from sodium salt solution is possible by using mordenite. The distribution of strontium into zeolites from 1〜2 M solutions of sodium chloride and sodium nitrate were in the order of zeolite A>zeolite X>zeolite Y&sime;mordenite. The distribution coefficient of 230 was obtained for 1 M solutions of sodium salts. The anion in solutions had no effect on the distribution of cesium and strontium into zeolite from sodium salt solution.