Journal of Inorganic Materials, Volume. 35, Issue 3, 367(2020)
137Cs is one of the most intractable β-emitters which is commonly generated from nuclear weapons test and nuclear power station. Due to the nature of high solubility and mobility, the effective sequestration of 137Cs + from radioactive waste solution is considered as a long-term challenge. In this work, a two-dimensional layered anion framework material (SZ-6) was synthesized through conventional solvothermal reaction and the Cs + removal properties were systematically investigated. Single Crystal X-ray Diffraction (SCXRD) analysis revealed that SZ-6 adopts layer packed structure with large tetramethylammonium cations loaded between the layers which is greatly beneficial to cation exchange process. Powder X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) confirmed the material with high purity and excellent hydrolytic stability. Batch experiments were used to investigate the adsorption behavior towards Cs + in aqueous solutions. The adsorption kinetics of SZ-6 could be achieved within 5 min, which is currently one of the fastest sorbents for the removal of Cs +. Meanwhile, SZ-6 exhibits superior decontamination capability over a wide pH range from 4 to 12. Furthermore, it possesses marked selectivity in the presence of large excess of Na +, K +, Ca 2+ competing cations.
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Guodong LI, Guoxun JI, Xinli SUN, Wei DU, Wei LIU, Shuao WANG.
Category: RESEARCH PAPER
Received: Aug. 16, 2019
Accepted: --
Published Online: Jan. 27, 2021
The Author Email: JI Guoxun (ji_guoxun@sina.com), LIU Wei (wliu@alu.suda.edu.cn)