Fe3O4-loaded Ion Exchange Resin for Chromatographic Separation of Boron Isotopes: Experiment and Numerical Simulation

Chemical Engineering Research and Design Pub Date : 2020-08-31 DOI:10.22541/au.159884105.56132261

Qingfeng Wang, Tao Chen, P. Bai, Jiafei Lyu, Xianghai Guo

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引用次数: 7

Abstract

Fe3O4-loaded ion exchange resin composites (Fe3O4@Resin) were optimally constructed through ion exchange and co-precipitation of Fe2+ and Fe3+ on strong acid ion exchange resin. The as-synthesized Fe3O4@Resin composite was sophisticatedly characterized and investigated for 10B/11B separation including effect of pH, kinetics and isotherms through batch adsorption experiments which can be well described by pseudo-second order kinetics and Langmuir model. In the chromatographic column packed with Fe3O4@Resin, 10B was selectively retained with a high dynamic separation factor of 1.312. Considering the consistency between simulated and experimental breakthrough curves within Fe3O4@Resin packed column, chromatographic 10B/11B separation performance was simulated under various conditions which were further optimized by Box-Behnken design. Consequently, the annual yield of 10B reached the maximum of 612 g with feed concentration of 7.567 g·L−1, flow rate of 38.57 mL·min−1, and column size of 2.2×45 cm (I.D. × length). In addition, five-cycle adsorption/regeneration experiments demonstrated its merit of reusability.

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负载fe3o4离子交换树脂用于硼同位素色谱分离:实验与数值模拟

通过离子交换，将Fe2+和Fe3+在强酸离子交换树脂上共沉淀，构建了负载fe3o4的离子交换树脂复合材料(Fe3O4@Resin)。通过批吸附实验对合成的Fe3O4@Resincomposite进行了详细的表征，考察了pH、动力学和等温线对10B/ 11b分离的影响，并采用拟二级动力学和Langmuir模型对其进行了较好的描述。在Fe3O4@Resin填充的色谱柱中，10B被选择性保留，动态分离系数高达1.312。考虑到Fe3O4@Resin填充柱内模拟突破曲线与实验突破曲线的一致性，对不同条件下10B/11B色谱分离性能进行了模拟，并采用Box-Behnkendesign进一步优化。结果表明，在进料浓度为7.567 g·L−1、流速为38.57 mL·min−1、柱尺寸为2.2×45 cm(径×长)的条件下，10B的年产量最高可达612g。此外，五循环吸附/再生实验证明了其可重复使用的优点。

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Chemical Engineering Research and Design

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