کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
637822 | 883695 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cation effect on anion separations by aza-crown ligands in liquid membranes
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
New carriers have been prepared based on the aza-18-crown-6 structure to facilitate membrane transport of ions. One of these incorporates four aza-18-crown-6 molecules bonded to a resorcinarene ring. The other, aza-18-crown-6 bonded to an undecyl chain, was studied as a monomeric analog. These carriers have been included in dichloromethane bulk liquid membranes (BLMs) to assess cation influence on competitive transport among anions (ReO4â, NO3â, ClO4â). ReO4â was investigated as a non-radioactive analog of the pertechnetate anion, which is of interest in nuclear waste separations. The permeability values and selectivity for ReO4â and ClO4â were the greatest when neutral source and receiving phases were used with K+ as the co-transported cation. The carriers also showed selectivity for ReO4â and ClO4â over NO3â with K+ and Na+ as the co-transported cations using neutral and basic aqueous phase solutions. It was also found that some cations inhibit anion transport.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 321, Issue 1, 1 August 2008, Pages 15-21
Journal: Journal of Membrane Science - Volume 321, Issue 1, 1 August 2008, Pages 15-21
نویسندگان
John D. Lamb, Cheryl A. Morris, Jeremiah N. West, Kirk T. Morris, Roger G. Harrison,