Codeposition Modification of Cation Exchange Membranes with Dopamine and Crown Ether To Achieve High K+ Electrodialysis Selectivity

2019 ◽  
Vol 11 (19) ◽  
pp. 17730-17741 ◽  
Author(s):  
Shanshan Yang ◽  
Yuanwei Liu ◽  
Junbin Liao ◽  
Huawen Liu ◽  
Yuliang Jiang ◽  
...  
Keyword(s):  
Crown Ether ◽  
Cation Exchange ◽  
High K

A model of Na-K-2Cl cotransport based on ordered ion binding and glide symmetry

1998 ◽  
Vol 274 (2) ◽  
pp. C299-C309 ◽  
Author(s):  
Christian Lytle ◽  
Thomas J. McManus ◽  
Mark Haas
Keyword(s):  
Simple Model ◽  
Blood Cell ◽  
Cation Exchange ◽  
Red Blood Cell ◽  
Ion Binding ◽  
K Cells ◽  
Ion Movement ◽  
High K

In the duck red blood cell, Na-K-2Cl cotransport exhibits two modes of ion movement: net cotransport and obligate cation exchange. In high-K cells, the predominant exchange is K/K (or K/Rb). In high-Na cells, it becomes Na/Na (or Na/Li). Both represent partial reactions in which a fully loaded carrier releases part of its cargo, rebinds fresh ions, and returns back across the membrane fully loaded. Net cotransport occurs when the carrier unloads completely and returns empty. This mode has a fixed stoichiometry of 1Na:1K:2Cl under all conditions tested. The ion requirements of the two exchanges differ: K/K exchange requires only K and Cl outside but all three ions inside. Na/Na exchange requires all three ions outside but only Na inside. We propose a simple model in which the carrier can only move when either fully loaded or completely empty and in which the ions bind in a strictly ordered sequence. For example, externally, a Na binds first and then a Cl, followed by a K and a second Cl. Internally, the first on is the first off (glide symmetry), so the Na is released first and then the first Cl, followed by the K and finally by the second Cl. Only then can the empty form return to the outside to start a new cycle.

EXTRACTION OF Mn(II) FROM NITRIC ACID BY CROWN ETHER-SYNERGIZED CATION EXCHANGE EXTENDED EQUILIBRIUM AND INFRARED ANALYSIS*

1993 ◽  
Vol 11 (5) ◽  
pp. 889-921 ◽  
Author(s):  
Bruce A. Moyer** ◽  
Laelitia H Delmau† ◽  
Gregg J. Lumetta†† ◽  
C. F. Baes
Keyword(s):  
Nitric Acid ◽  
Crown Ether ◽  
Cation Exchange ◽  
Infrared Analysis

Synthesis of crown ether modified cation exchange polymer particles for 90Sr urinalysis

2012 ◽  
Vol 72 (5) ◽  
pp. 295-302 ◽  
Author(s):  
Amy Hrdina ◽  
Edward Lai ◽  
Chunsheng Li ◽  
Baki Sadi ◽  
Gary H. Kramer
Keyword(s):  
Crown Ether ◽  
Cation Exchange ◽  
Polymer Particles

Synthesis of poly(arylene ether ketone)s bearing skeletal crown ether units for cation exchange membranes

2015 ◽  
Vol 53 (23) ◽  
pp. 2786-2793 ◽  
Author(s):  
Bram Zoetebier ◽  
Sinem Tas ◽  
G. Julius Vancso ◽  
Kitty Nijmeijer ◽  
Mark A. Hempenius
Keyword(s):  
Crown Ether ◽  
Cation Exchange ◽  
Arylene Ether ◽  
Ether Ketone
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