微量セシウムの行動のCs137による追跡

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The loss of cesiun in the process of separation and concentration from sea water was examined. When the quantity of cesium is very small (K/Cs>2000 by atomic ratio), cesium does not always behave as potassiun in the separation of NaCl and KCl. Cesium is precipitated almost perfectly with potassium by chloroplatinate method and remains perfectly in solution by alcoholic-HCl method. On the other hand, about 80% of cesium moves into the NaClO<SUB>4</SUB> fraction by perchlorate method, and 30-40 % is lost by cobaltinitrite method. The whole process of separation and concentration of cesium by the removal of alkaline earth elements with oxin, precipitation of sulfate ion with barium chloride and elimination of the excess barium carbonate adopted by E, Minami. et al, who gave 0.1 to 1γ Cs/<I>l</I> of sea water in 1947 was proved to be satisfactory. Also, G. Jander's concentration process of removing of KCl from carnallite with HCl and precipitation of cesium silicomolybdate was proved to be satifsctory.
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