Bliznyuk Valery N, Kołacińska Kamila, Pud Alexander A, Ogurtsov Nikolay A, Noskov Yuriy V, Powell Brian A, DeVol Timothy A
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.
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。
