Cellulose nanofiber backboned Prussian blue nanoparticles as powerful adsorbents for the selective elimination of radioactive cesium.
Cellulose nanofiber backboned Prussian blue nanoparticles as powerful adsorbents for the selective elimination of radioactive cesium.
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纤维素纳米纤维回封的普鲁士蓝色纳米颗粒是有力消除放射性剖宫产的强大吸附剂。
DOI：
10.1038/srep37009
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发表时间：
2016-11-15
影响因子：
4.6
通讯作者：
Dresselhaus MS
中科院分区：
文献类型：
--
作者：
Vipin AK;Fugetsu B;Sakata I;Isogai A;Endo M;Li M;Dresselhaus MS
2011年3月11日，日本东北部发生了令人难忘的9级地震，随后又发生了毁灭性的海啸。当天，福岛第一核电站受损的核反应堆释放了大量放射性核素。由于海水和土壤中存在大量具有竞争性功能的共存离子，对分散的放射性核素进行净化一直是最大的困难。六氰高铁酸铁，也被称为普鲁士蓝（PB），是选择性捕获放射性铯离子的最强大的材料；然而，它在水中极易形成稳定的胶体，这使得PB不可能用于露地放射性铯的净化应用。正如本研究所描述的，纳米/纳米组合方法为PB固有的胶体形成困难提供了最终解决方案。采用纤维素纳米纤维（CNF）固定PB，制备CNF骨架PB。CNF-骨干PB （CNF/PB）具有良好的耐水性，对放射性铯离子的吸收能力为139 mg/g，分布系数为100万（106）个数量级。对福岛土壤和海水净化的实地研究取得了令人满意的结果，证明了CNF/PB在实际应用中的高能力。
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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