³²P, ³⁵Sおよび⁴⁵Caを含む乳化シンチレータ廃液の焼却のための塩析による前処理

抄録

In order to incinerate the emulsive liquid scintillator waste containing ³²P, ³⁵S and ⁴⁵Ca, application of demulsion by salt out technique for pre-treatment had been experimentally investigated.
As the results, it was obtained that about 99% of aqueous content was removed from the liquid waste and their viscosities were being less than 5 cP.
Then, more than 95% of radioactivities of the above nuclides were simultaneously removed together with aqueous content, by using 4 M NaCl and 3 M (NH₄) ₂CO₃ as salt out reagents for the liquid scintillator wastes containing inorganic labeled compounds such as KH₂³²PO₄, H₂³⁵SO₄ and ⁴⁵CaCl₂, and organic labeled compounds such as ³²P-ATP and ³⁵S-methionine respectively.
Still, as other common conditions for demulsion, it was found that suitable factors were mixing time of 2 min and temperature of 40-50°C.