液体シンチレータ廃液の前処理に関する基礎的研究

概要

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Pretreatment of liquid scintillation wastes containing hydrophilic radioactive compounds before combustion was studied. In various kinds of scintillation solutions, high removal percentages of the radioactivity were observed with calcium hydroxide (Ca (OH)_2), molecular sieves, and synthetic zeolite compared with anhydrous calcium chloride (CaCl_2), aluminum oxide, and silicic acid. The retention capacities of CaCl_2 and Ca (OH)_2 for ^<14>C-methanol were approximately twice those of molecular sieves and synthetic zeolite. One gram of Ca (OH)_2 was effective in the removal of radioactivity from 10 ml of toluene-triton scintillator waste if it contained less than 10% (v/v) of water. In case of waste which contains only a trace amount of hydrophilic labeled compounds, it is possible to remove the radioactivity by the treatment with CaCl_2 or Ca (OH)_2. Treatments with molecular sieves with suitable micropore size or synthetic zeolite were effective to remove the radioactivity from the waste containing hydrophilic substances. These data indicate that, by the combination of these pretreatments, it is possible to remove the radioactivity from the various wastes.
社団法人日本薬学会の論文
1982-08-31