Tailoring Abundant Active-Oxygen Sites of Prussian Blue Analogues-Derived Adsorbents for Highly Efficient Yb(Iii) Capture

作     者：Zhang, Yi Guo, Weidong Liu, Donghao Ding, Yigang 

作者机构：Key Laboratory of Green Chemical Process of Ministry of Education Hubei Key Laboratory for Novel Reactor and Green Chemical Technology Engineering Research Center of Phosphorus Resources Development and Utilization Ministry of Education School of Chemical Engineering and Pharmacy Wuhan Institute of Technology Wuhan430073 China Key Laboratory of Coal Processing and Efficient Utilization China University of Mining and Technology Ministry of Education Xuzhou221008 China 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Rare earths 

摘      要：The removal of rare earth element in mineral processing wastewater is highly desirable but still challenging. In this study, three bimetallic Prussian blue analogues (PBA) and six corresponding oxides were prepared by co-precipitation and calcination methods, and then utilized to adsorb aqueous Yb(III) solution. Among them, three PBO-800 samples exhibit the superior adsorption capacities (˃250 mg/g). The adsorption processes of Yb(III) are in accordance with the pseudo-second-order kinetic model and Langmuir model, simultaneously showing the spontaneous and endothermic thermodynamics. Moreover, PBO-800 can be reused after alkane solution regeneration with less than 10% degradation after five consecutive adsorption-desorption cycles. More importantly, PBO-800 exhibits the excellent separation selectivity of Yb(III) and most light rare earth ions (i.e., 5.51 of Yb/La, 4.03 of Yb/Pr). According to the characterization analysis before and after the adsorption of Yb(III) by XRD, SEM, Mapping, EDS and XPS, the adsorption mechanism of PBO-800 is mainly attributed to the strong interaction between the abundant active-oxygen sites and Yb(III), as well as the significant electrostatic attraction. © 2022, The Authors. All rights reserved.