TRU廃棄物含有有機物の処分条件下におけるアルカリ分解

Alkaline degradation of organic materials contained in TRU wastes under repository conditions

大塚 剛樹*; 馬場 恒孝

Otsuka, Yoshiki*; Bamba, Tsunetaka

これまでアルカリ加水分解挙動についてほとんど検討されていない9種類のTRU廃棄物含有有機物を対象として、その処分環境条件、つまり低酸素雰囲気かつセメント系材料起源のアルカリ性溶液環境の下、90C,91日間で加水分解試験を実施した。セルロース及びプラスチック固化体は比較的分解しやすく、ゴム類は分解しにくいことがわかった。また、有機物のアルカリ加水分解は有機物の有する官能基が起点となって生じ、官能基の種類によって分解の難易が異なるものと推察できた。

Alkaline degradation tests for 9 organic materials were conducted under the conditions of TRU waste disposal: anaerobic alkaline conditions. The tests were carried out at 90 C for 91 days. The sample materials for the tests were selected from the standpoint of constituent organic materials of TRU wastes. It has been found that cellulose and plastic solidified products are degraded relatively easily and that rubbers are difficult to degrade. It could be presumed that the alkaline degradation of organic materials occurs starting from the functional group in the material. Therefore, the degree of degradation difficulty is expected to be dependent on the kinds of functional group contained in the organic material.