R&D of removal technology of radioactive contaminants from the environment by using polymer absorbents

Ito, Hisayoshi; Seko, Noriaki; Kuroki, Ryota; Yaita, Tsuyoshi; Naganawa, Hirochika  ; Nakayama, Shinichi 

For removing radioactive contaminants from the environment due to the nuclear plant accident, we have synthesized highly efficient cesium absorbents by introducing molybdophosphoric acid groups into polyethylene matrix with radiation grafting. Cesium absorbents based on protein or crown ether materials have been newly developed. We have also established immobilization-collection technology of cesium-adsorbed surface soil by using a mixture of polyion and bentonitic clay material. The effectiveness of these materials has been demonstrated through the field examination in Fukushima.