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Europium(III) permeation through a flat sheet supported liquid membrane containing CMPO with iso-decanol phase modifier: Experimental and modeling studies
Chemical Engineering Research and Design ( IF 3.9 ) Pub Date : 2021-02-17 , DOI: 10.1016/j.cherd.2021.02.009
Rohit Kumar , Seraj A. Ansari , Pankaj Kandwal , P.K. Mohapatra

The permeation of Eu3+ ion across a microporous polymeric membrane impregnated with n-octyl(phenyl)-N,N-di-isobutylcarbamoyl methyl phosphine oxide (CMPO) was investigated from a nitric acid feed into a receiver phase of distilled water. A combination of 0.2 M CMPO in 5% iso-decanol + 95% n-dodecane was chosen as the carrier solvent. Here, iso-decanol has a dual role; acts as a phase modifier to avoid third phase formation, and minimizes the acid co-transport. The transport of Eu3+ was mainly driven by its distribution ratio by CMPO at the feed–membrane interface (extraction) and membrane–receiver interface (stripping). The effect of various experimental parameters such as feed acidity, nitrate ion concentration, and ligand concentration on permeation of Eu3+ was investigated. Effect of various stripping solutions was also studied to optimize the permeation efficiency of Eu3+ ions. A mathematical model was derived for predicting the mass transfer from feed phase to the receiver phase through the membrane. The results obtained by the calculations were subsequently validated through the experimental results.



中文翻译:

III(III)通过含CMPO和癸醇相改性剂的平板支撑液膜的渗透:实验和模型研究

Eu的渗透3+跨与浸渍的微孔性聚合物膜离子ñ -辛基(苯基)-N,N --isobutylcarbamoyl甲基氧化膦(CMPO)从硝酸进料进行了研究入蒸馏水的接收机相。 选择在5%癸醇 +  95%十二烷中的0.2 M CMPO的组合作为载体溶剂。在此,癸醇具有双重作用。用作相改性剂,避免形成第三相,并最大程度地减少了酸的共同运输。Eu 3+的运输主要受CMPO在进料-膜界面(萃取)和膜-接收器界面(剥离)的分布比的驱动。研究了进料酸度,硝酸根离子浓度和配体浓度等各种实验参数对Eu 3+渗透的影响。还研究了各种汽提溶液的影响,以优化Eu 3+离子的渗透效率。推导了数学模型,以预测通过膜从进料相到接收相的质量转移。通过计算获得的结果随后通过实验结果进行了验证。

更新日期:2021-03-02
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