TREATMENT METHOD OF RADIOACTIVE WASTE WATER CONTAINING RADIOACTIVE CESIUM AND RADIOACTIVE STRONTIUM

摘要

Provided is a method for treating a radioactive waste liquid containing radioactive cesium and radioactive strontium. In the method, a radioactive waste liquid containing radioactive cesium and radioactive strontium is passed through, at a linear flow rate (LV) of 1-40 m/h and a space velocity (SV) of 200 h-1 or less, an adsorption column filled to a bed height of 10-300 cm with an adsorbent material so as to adsorb the radioactive cesium and the radioactive strontium onto the adsorbent material. The adsorbent material is particulate with a particle diameter of 250-1200 µm and is a cesium or strontium adsorbent material which contains a crystalline silicotitanate represented by general formula A4Ti4Si3O16·nH2O (in the formula, A denotes Na, K or a combination thereof and n denotes a number between 0 and 8), which has a crystallite diameter of 60 Å or more and a half-value width at a diffraction peak of the lattice plane (100 plane) of 0.9° or less.