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首页> 外文期刊>Colloids and Interfaces >Fabrication of Mesoporous NaZrP Cation-Exchanger for U(VI) Ions Separation from Uranyl Leach Liquors
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Fabrication of Mesoporous NaZrP Cation-Exchanger for U(VI) Ions Separation from Uranyl Leach Liquors

机译:用于U(VI)离子的中孔NaZRP阳离子交换剂的制备从铀酰浸渍液中分离

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As the demand for uranium production-based energy worldwide has been increasing in the last decades to maintain nuclear growth for electricity production, there are great efforts towards developing an easy and inexpensive method for uranium extraction and separation from its ores. For this purpose, mesoporous inorganic cation exchangers provide an efficient separation technology that can help streamline production and lower overall cost. This study describes the development of nano-structured mesoporous sodium zirconium phosphate (NaZrP-CEX) for separation and extraction of uranyl ions from real samples. The fabricated NaZrP-CEX was well characterized by various techniques such as X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM), N2 adsorption/desorption, Dynamic light scattering (DLS) and zeta potential). The kinetics/thermodynamic behaviors of uranyl ion adsorption into NaZrP-CEX from an aqueous solution were minutely studied. The kinetic studies showed that the pseudo-second order model gave a better description for the uptake process. The negative value of ΔG indicate high feasibility and spontaneity of adsorption. Finally, mesoporous NaZrP-CEX can be regenerated using both of HNO3 (0.05 M) or HCl (1 M) up to seven cycles of operation.
机译:随着对基于铀生产的能源的需求在过去几十年来维持电力生产核增长的情况下,在维持核增长的情况下,努力为铀提取和与矿石分离开发一种简便而廉价的方法。为此目的,中孔无机阳离子交换剂提供了一种有效的分离技术,可以帮助简化生产和降低总体成本。本研究描述了纳米结构介孔磷酸钠(NaZrp-Cex)的发展,用于与真实样品分离和提取铀酰离子。由X射线衍射(XRD),傅里叶变换红外(FTIR),扫描电子显微镜(SEM),N2吸附/解吸,动态光散射(DLS)和Zeta电位等各种技术具有很好的特征在于诸如X射线衍射(XRD),傅立叶变换红外(FTIR),扫描电子显微镜(SEM),N2 。小巧地研究了来自水溶液中铀酰离子吸附到NaZrp-Cex中的动力学/热力学行为。动力学研究表明,伪二次阶模型对吸收过程提供了更好的描述。 ΔG的负值表示吸附的高可行性和自发性。最后,可以使用HNO3(0.05M)或HCl(1M)的HNO 3(0.05M)或HCl(1M)再生介孔NaZrp-Cex。

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