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首页> 外文期刊>International Journal of Environmental Science and Technology >Recovery of gadolinium ions based on supported ionic liquid membrane: parametric optimization via central composite design approach
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Recovery of gadolinium ions based on supported ionic liquid membrane: parametric optimization via central composite design approach

机译：基于负载离子液体膜的钆离子回收：通过中央复合设计方法参数优化

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摘要

Gadolinium is a contrast agent in magnetic resonance imaging, and the extraction and purification process has been very much considered due to the importance of its applications. The transport of gadolinium ions was investigated by utilizing the supported liquid membrane with mixtures of extractants as a carrier. The systematic conditions of the process were optimized based on the experimental design approach. At the first time, the effect of mixing of two extractants such as di-(2-ethylhexyl) phosphoric acid, tributyl phosphate extractants and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide as a green environmental solvent was studied on the gadolinium ion transport and the optimal concentration was utilized in the preparation of carrier concentration. In the second time, the main variables such as reaction time, the concentration of gadolinium ions, acidity in the source and stripping phases were optimized equal to 6 h, 200 mg/L, 5 and 1.86 M, respectively. The permeability coefficients were calculated based on the predicted equation for the transport percent of gadolinium ions, and the results were in agreement with the calculated values from the experimental data (coefficient of determination equal to 0.959). Finally, the applicability of gadolinium extraction through the supported liquid membrane was confirmed in the process with the presence of ionic liquids.
机译：钆是磁共振成像中的造影剂，由于其应用的重要性，提取和净化过程非常考虑。通过利用用萃取剂的混合物作为载体来研究钆离子的运输。基于实验设计方法优化了该过程的系统条件。在钆中研究了两种萃取剂如二 - （2-乙基己基）磷酸，磷酸三丁基萃取剂和1-己基-3-甲基咪唑鎓双（三氟甲基磺酰基）酰亚胺的效果，作为绿色环境溶剂，在钆中在制备载体浓度时使用离子传输和最佳浓度。在第二次中，诸如反应时间，钆离子的浓度，源极和汽提相中的酸度等的主要变量优化了6 h，200mg / L，5和1.86m。基于用于钆离子的转运百分比的预测方程来计算渗透系数，结果与从实验数据的计算值（确定系数等于0.959）一致。最后，通过存在离子液体，在该方法中证实了钆萃取通过负载液膜的适用性。

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