2013 Volume 62 Issue 12 Pages 885-893
Removal/adsorption of 32PO43− from the water by the naturally occurring ancient shellfish fossil(ASF) was examined. As a result, selective adsorption ability of ASF for 32PO43− was revealed. Then, the ASF containing soap was prepared, and its usefulness as decontamination agent was investigated, using various 32PO43− contaminated plates consisting of different materials. The ASF containing soap had a remarkable decontamination effect on lead plate, aluminum plates, and the floor material in radioisotope facility, which were generally hard to be decontaminated. Besides, though 20 - 40% of pollution remained in latex gloves, human hand skin, and stainless steel(SUS) plate by the twice washing with the water, the contaminations were decontaminated with the ASF containing soap by more than 90%, suggesting the usefulness of ASF as the decontamination agent for the contamination with radioactive phosphate ion.
