Journal of Inorganic Materials, Volume. 34, Issue 1, 17(2019)
Removal of Radionuclides by Metal-organic Framework-based Materials
Figures & Tables(7)
![(1) SEM images, (2) XRD patterns, (3) FT-IR spectra, (4) N2 sorption isotherms[26] of MIL-101 and its amino derivatives, (a) MIL-101; (b) MIL-101-NH2; (c) MIL-101-ED; (d) MIL-101-DETA](/Images/icon/loading.gif){kind=icon}
. (1) SEM images, (2) XRD patterns, (3) FT-IR spectra, (4) N2 sorption isotherms[26] of MIL-101 and its amino derivatives, (a) MIL-101; (b) MIL-101-NH2; (c) MIL-101-ED; (d) MIL-101-DETA
. (a) UV-Vis absorption spectra of TcO4- during the anion exchange; (b) Sorption kinetics of TcO4- by SCU-101 compared with Purolite A530E and A532E; (c) Sorption isotherms of ReO4- by SCU-101, Mg-Al-LDH, and NDTB-1; (d) Effect of competing anions on the removal percentage of TcO4- by SCU-101; (e) Effect of SO42- on the anion exchange of ReO4- by SCU-101; (f) Removal percentage of ReO4- after irradiation as compared with the original SCU-101 sample[28]
. Linear pseudo-first-order kinetic (a), pseudo-second-order (b), intraparticle diffusion (c) and elovich equation (d) for adsorption of Cs+ on MOF/KNiFC and MOF/Fe3O4/KNiFC[44]; (e) Isotherm model of U(VI) adsorption on UiO-66 (inset) and GO-COOH/UiO-66 composites; (f) Langmuir model, (g) Freundlich model, and (h) Dubinin-Radushkevich model[30]
. (a) Comparison of experimental U L3-edge XANES spectra for pristine MIL-101(Cr), and different ED contents grafting ED-MIL-101(Cr) samples after the adsorption of U(VI), (b) Experimental Fourier transform of the U L3-edge EXAFS data for different samples and their corresponding fits[54]
. MD simulations on the process of uranyl sorption into SZ-2. The top (a) and side (b) view of the simulation system-1 (uranyl cation approaching along the c axis); (c) The final snapshot (at t ¼ 100 ns) of run 1 (out of total 6) to show the importance of equatorial water of uranyl cation in mediating its binding to the SZ-2 (the blue dash line indication the hydrogen bond between equatorial water molecules and the dangling hydrogen bond acceptors); (d) Time evolution of the electrostatic and vdW interaction energies of uranyl cation with SZ-2 and water; (e) The number of equatorial water molecules of uranyl cation (pink curve) and the number of hydrogen bonds formed between equatorial coordinating water molecules and other acceptors (including F and O in main framework) as the function of simulation time[58]
Table 1. Radionuclides adsorption on different materials
View tableView in ArticleTable 1. Radionuclides adsorption on different materials
Adsorbents Radionuclides (m/V)/(g·L-1) C0/(mg·L-1) t/h pH Qmax/(mg·g-1) Interaction mechanism Ref. MIL-101 U(VI) 0.4 100 2 5.5 20 Surface complexation [26] MIL-101-NH2 U(VI) 0.4 100 2 5.5 90 Surface complexation [26] MIL-101-ED U(VI) 0.4 100 2 5.5 200 Surface complexation [26] MIL-101-DETA U(VI) 0.4 100 2 5.5 350 Surface complexation [26] GO-COOH/UiO-66 U(VI) 0.5 95 4 8.0 188 Surface complexation and ion exchange [30] SCU-101 Re(IV) 1.0 1000 0.2 - 217 Ion exchange [28] SCU-100 Re(IV) 1.0 28 2 - 541 Ion exchange [29] UiO-66-(COOH)2 Th(IV) 0.4 100 6 3.0 350 Surface complexation [31] MOF-808-SO4 Ba(II) 1.0 42 0.1 5.8 131 Surface complexation [32] UiO-66-Schiff Co(II) 0.1 10 5 8.4 256 Surface complexation [33] FJSM-InMOF Sr(II) 2.5 18 12 - 44 Ion exchange [34] FJSM-InMOF Cs(I) 2.5 90 3 - 199 Ion exchange [34] LDO-C U(VI) 0.1 50 4 5.0 354 Surface complexation and ion exchange [35] CS@LDH U(VI) 0.2 41 3 5.0 157 Surface complexation [36] GO Co(II) 0.1 10 4 5.0 44 Surface complexation [37] LDH U(VI) 0.2 50 6 4.5 69 Surface complexation and electrostatic interaction [38] Na-montmorillonite Ni(II) 0.5 10 6 6.0 13 Surface complexation and ion exchange [39] Fe3O4@TNS U(VI) 0.2 20 8 5.0 83 Ion exchange [40]
Table 2. The main purpose, advantages and disadvantages of main adsorption characterization techniques mentioned above
View tableView in ArticleTable 2. The main purpose, advantages and disadvantages of main adsorption characterization techniques mentioned above
技术 主要目的 优点 缺点 宏观实验 反应达到平衡所需时间, 最大吸附量, 选择性和影响因素[ 30 ]非常直观得到实验结果, 方便和有效 无法得到分子和原子水平上的作用机理 XPS分析 元素氧化态、元素种类和几乎所有元素的键合关系(除了H和He) 定量分析、元素组成分析、高表面灵敏度检测(1~10 nm) 在真空中进行的测量, 可能改变样品的性质; 在元素个数比值高于0.05%~ 1.0%条件下进行, 依赖于元素的性质 XAFS分析 氧化态、配位数、原子间键距离以及目标离子周围的离子状态[ 54 ]特定的元素, 并且总是可以检测到的, 对于研究非晶体材料是有用的; 吸附物种的分析 无法区分原子能相差较小的原子(C、N、O或S、Cl、Mn或Fe)[ 59 ,60 ]FT-IR分析 对微米范围内吸附行为的研究(光密度≥10-5) 灵敏检测官能团和极性键[ 61 ]定性而不是定量, 灵敏度低 DFT计算 键能、键长、轨道和系统电荷密度[ 32 ,62 ]对局部环境的吸附描述和原子级吸附过程的描述[ 63 ]优化结构之间的能量与长时间模拟结果较不准确 分子动力学模拟 位置、势能和宏观现象的预测[ 64 ]吸附过程的快照在几秒内发生[ 27 ]长时间的计算时间, 依赖于计算的性能
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Xiang-Xue WANG, Shu-Jun YU, Xiang-Ke WANG, [in Chinese], [in Chinese], [in Chinese]. Removal of Radionuclides by Metal-organic Framework-based Materials[J]. Journal of Inorganic Materials, 2019, 34(1): 17
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Category: Research Articles
Received: May. 7, 2018
Accepted: --
Published Online: Feb. 4, 2021
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