Removal of radionuclides by metal oxide materials and mechanism research

Abstract

With the development of civil nuclear industry, "radioactive contamination" has aroused worldwide public attention increasingly. The study on the interaction of radionuclides at solid-liquid interfaces can lead to a more profound comprehension of its diffusion, migration and transformation in the natural environment, which would make the disposal and control of radioactive wastes more effectively. The metal oxide materials have shown great potential applications in the field of radionuclides' removal, which are mainly attributed to their multiple advantages, such as the sufficiency, the low cost, the environmental friendliness and the large sorption capacity. Herein, we reviewed the application of commonly used metal oxide materials (such as iron oxides, layered double oxides, aluminum oxides and titanium dioxides) in the sorption of radionuclides from large volumes of aqueous solutions in the last five years. The sorption properties and the main interaction mechanism were investigated and discussed through batch experiments, surface complexation models, spectroscopic techniques and theoretical calculations. Moreover, the application of the metal oxide materials in environmental radioactive pollution cleanup was also discussed. Therefore, we hope that this work would be helpful to further investigation and application of metal oxide materials in environmental radionuclide pollution management.

Removal of Radionuclides from Aqueous Solution by Manganese Dioxide-Based Nanomaterials and Mechanism Research: A Review

“…Under different conditions, the adsorption effect of MnO 2 -based adsorbents on crucial radionuclides is summarized in Table . Upon comparison of the reported effects of layered double hydroxide-based materials, metal oxide-based materials, and MOFs/COFs − on radionuclide removal, it can be found that MnO 2 -based nanomaterials are simpler to synthesize and more environmentally friendly, have more types and more stable properties, and have no inferior removal performance at the same time. Above, we summarized the effects of environmental conditions on the adsorption of radionuclides by MnO 2 -based nanomaterials: with the increase of time and temperature, the removal ability of materials was improved; under neutral conditions, because of surface coordination, electrostatic adsorption, and coprecipitation, the material had higher removal efficiency; additionally, as the amount of adsorbent increased, the removal rate increased and the adsorption amount declined.…”

Research progress of MXene materials in radioactive element and heavy metal ion sequestration

“…x MXene相似. Zhang等 [50] 计算结果表明, 铀酰离 [52] (网络版彩图) 、 碳基纳米材料 [65] 、金属氧化物材料 [66] 、四氧化三铁 基纳米材料 [67] 以及金属有机骨架化合物(MOFs) [5] [50] .…”

Adsorption of U(VI) by boron nitride-supported iron phosphotungstate: an experimental and mechanism study

“…料如Fe 3 O 4 -GO复合材料(69.49 mg/g) [31] 、Fe 3 O 4 @SiO 2 (105.0 mg/g) [29] 、GO-LDH (159.7 mg/g) [29] 等, 证明了…”