纯聚多巴胺从地下水和海水中提取铀和钚的高效性。
High effectiveness of pure polydopamine in extraction of uranium and plutonium from groundwater and seawater.
作者信息
Bliznyuk Valery N, Kołacińska Kamila, Pud Alexander A, Ogurtsov Nikolay A, Noskov Yuriy V, Powell Brian A, DeVol Timothy A
机构信息
Department of Environmental Engineering and Earth Sciences, Clemson University Clemson SC 29634-0919 USA
Nuclear Environmental Engineering Sciences and Radioactive Waste Management (NEESRWM) Center, Clemson University Clemson SC 29634-0942 USA.
出版信息
RSC Adv. 2019 Sep 24;9(52):30052-30063. doi: 10.1039/c9ra06392g. eCollection 2019 Sep 23.
Sorption properties of polydopamine (PDA) for uranium and plutonium from an aqueous environment are reported at three different pH values (2, 4 and 6.5-7). In addition to deionized (DI) water, artificial groundwater (GW) and seawater (SW) were used with U uptake close to 100% in each case. PDA polymer has been identified as a material with extremely high sorption capacity ∼500 mg g of the polymer at pH 6.5 and high selectivity for uranium. Similar high sorption properties are revealed for plutonium uptake. PDA-uranyl and PDA-plutonium interactions responsible for the observed adsorption processes have been addressed with a set of experimental techniques including FTIR spectroscopy, electron microscopy and cyclic voltammetry.
报道了聚多巴胺（PDA）在三种不同pH值（2、4和6.5 - 7）下从水环境中对铀和钚的吸附特性。除了去离子水（DI）外，还使用了人工地下水（GW）和海水（SW），每种情况下铀的吸附率都接近100%。已确定PDA聚合物是一种吸附容量极高的材料，在pH值为6.5时约为500 mg/g聚合物，并且对铀具有高选择性。对于钚的吸附也显示出类似的高吸附特性。利用包括傅里叶变换红外光谱（FTIR）、电子显微镜和循环伏安法在内的一系列实验技术，研究了导致观察到的吸附过程的PDA - 铀酰和PDA - 钚相互作用。
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