Separation and Recovery of Eu(III) and Y(III) with Solvent Impregnated Resin Coated by Crosslinked Chitosan
Separation and Recovery of Eu(III) and Y(III) with Solvent Impregnated Resin Coated by Crosslinked Chitosan
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交联壳聚糖包覆溶剂浸渍树脂分离回收Eu(III)和Y(III)
DOI：
10.5182/jaie.25.93
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Yoshizuka
中科院分区：
文献类型：
--
作者：
S. Nishihama;Akane Kawasaki;K. Yoshizuka
研究了戊二醛交联壳聚糖包覆2-乙基己基膦酸单2-乙基己酯溶剂浸渍树脂（SIR）分离铕（Eu）和钇（Y）的性能。SIR的涂层成功地抑制了吸附过程中萃取剂的泄漏。在平衡pH = 2.27时，包覆SIR和未包覆SIR对Eu的吸附均符合Langmuir吸附机理，包覆SIR和未包覆SIR对Eu的最大吸附量分别为0.294 mol/kg和0.310 mol/kg。用聚合物涂覆SIR可以抑制最大吸附量的降低，而不是以前报道的其他涂覆的SIR。并将其应用于铕和钇的柱分离。通过逐渐增加稀硝酸浓度的梯度洗脱可以实现金属的完全分离。涂覆的SIR也可以重复用于重复吸附-洗脱处理。
Separation of europium (Eu) and yttrium (Y), using a solvent impregnated resin (SIR) containing 2ethylhexyl phosphonic acid mono-2-ethylhexyl ester, coated by water-soluble chitosan crosslinked by glutaraldehyde, was investigated. Coating of the SIR successfully suppressed leakage of the extractant during adsorption processing. Adsorption of Eu with both coated and uncoated SIRs was progressed with Langmuir mechanism, and the maximum adsorption amount of Eu at equilibrium pH = 2.27 was 0.294 mol/kg with coated SIR and 0.310 mol/kg with uncoated SIR. Decrease in the maximum adsorption amount by coating SIR with polymer can be suppressed rather than the other coated SIRs previously reported. The coated SIR was then applied to column separation of Eu and Y. Complete separation of the metals could be achieved by gradient elution with a gradual increase in the concentration of a dilute nitric acid. The coated SIR could also be reused for repeated adsorption-elution processing.