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Self-Regulated Ion Permeation through Extraction Membranes
Langmuir ( IF 3.7 ) Pub Date : 2017-09-14 00:00:00 , DOI: 10.1021/acs.langmuir.7b02256 Jean Duhamet 1 , Helmuth Möhwald 2 , Maximilian Pleines 3 , Thomas Zemb 3
Langmuir ( IF 3.7 ) Pub Date : 2017-09-14 00:00:00 , DOI: 10.1021/acs.langmuir.7b02256 Jean Duhamet 1 , Helmuth Möhwald 2 , Maximilian Pleines 3 , Thomas Zemb 3
Affiliation
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Separation of rare earth compounds from water into an organic phase in practical cases requires the use of specific ion binding ligands in high concentrations. These tend to form complex liquid crystalline phases preferentially at ion-rich locations inside a pertraction membrane. They form a blocking layer above an ion concentration threshold, which is experimentally characterized. It is shown to limit the flux through the membrane, which is studied for the application of rare earth recycling, an example being the phase transfer of Nd from water into organic phase. This feedback leads to a stationary membrane permeation rate that can be modeled without any free parameters in very good agreement with experiment. The ion-specific formation and dissolution of the blocking layer, a feature found also in nature, and its control suggest further studies to enhance permeation as well as its selectivity control.
中文翻译：
通过萃取膜自我调节的离子渗透
在实际情况下，将稀土化合物从水中分离成有机相需要使用高浓度的特定离子结合配体。这些倾向于优先在吸引膜内部的离子富集的位置形成复杂的液晶相。它们在离子浓度阈值之上形成阻挡层，该阻挡层在实验上得到了表征。它被证明可以限制通过膜的通量，这是为稀土循环应用而研究的，其中一个例子是Nd从水到有机相的相转移。该反馈导致固定的膜渗透速率，该速率可以在没有任何自由参数的情况下与实验非常吻合地进行建模。阻挡层的离子特异性形成和溶解，这也是自然界发现的特征，
更新日期：2017-09-14
中文翻译：
通过萃取膜自我调节的离子渗透
在实际情况下，将稀土化合物从水中分离成有机相需要使用高浓度的特定离子结合配体。这些倾向于优先在吸引膜内部的离子富集的位置形成复杂的液晶相。它们在离子浓度阈值之上形成阻挡层，该阻挡层在实验上得到了表征。它被证明可以限制通过膜的通量，这是为稀土循环应用而研究的，其中一个例子是Nd从水到有机相的相转移。该反馈导致固定的膜渗透速率，该速率可以在没有任何自由参数的情况下与实验非常吻合地进行建模。阻挡层的离子特异性形成和溶解，这也是自然界发现的特征，
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