普鲁士蓝
铯
海水
人体净化
吸附
放射性核素
放射性废物
胶体
放射化学
纤维素
核化学
纳米纤维
化学
材料科学
化学工程
无机化学
纳米技术
废物管理
地质学
有机化学
物理化学
工程类
物理
海洋学
量子力学
电化学
电极
作者
Adavan Kiliyankil Vipin,Bunshi Fugetsu,Ichiro Sakata,Akira Isogai,Morinobu Endo,Mingda Li,M. S. Dresselhaus
摘要
On 11 March 2011, the day of the unforgettable disaster of the 9 magnitude Tohoku earthquake and quickly followed by the devastating Tsunami, a damageable amount of radionuclides had dispersed from the Fukushima Daiichi's damaged nuclear reactors. Decontamination of the dispersed radionuclides from seawater and soil, due to the huge amounts of coexisting ions with competitive functionalities, has been the topmost difficulty. Ferric hexacyanoferrate, also known as Prussian blue (PB), has been the most powerful material for selectively trapping the radioactive cesium ions; its high tendency to form stable colloids in water, however, has made PB to be impossible for the open-field radioactive cesium decontamination applications. A nano/nano combinatorial approach, as is described in this study, has provided an ultimate solution to this intrinsic colloid formation difficulty of PB. Cellulose nanofibers (CNF) were used to immobilize PB via the creation of CNF-backboned PB. The CNF-backboned PB (CNF/PB) was found to be highly tolerant to water and moreover, it gave a 139 mg/g capability and a million (106) order of magnitude distribution coefficient (Kd) for absorbing of the radioactive cesium ion. Field studies on soil and seawater decontaminations in Fukushima gave satisfactory results, demonstrating high capabilities of CNF/PB for practical applications.
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