Transport properties and ion binding in aqueous solutions of alkali metal salts of poly(thiophen-3-ylacetic acid)

2014 ◽  
Vol 198 ◽  
pp. 173-180 ◽  
Author(s):  
Gregor Hostnik ◽  
Dmitrij Bondarev ◽  
Jiří Vohlídal ◽  
Sašo Čebašek ◽  
Ema Žagar ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Aqueous Solutions ◽  
Transport Properties ◽  
Metal Salts ◽  
Ion Binding ◽  
Alkali Metal Salts ◽  
Ylacetic Acid

Self-assembly properties of polyphenylsulphonic acids and their alkali metal salts in aqueous solutions

1998 ◽  
Vol 136 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Jan Czapkiewicz ◽  
Jose L. del Castillo ◽  
Piotr Milart ◽  
Julio R. Rodriguez ◽  
Bożena Tutaj
Keyword(s):  
Alkali Metal ◽  
Aqueous Solutions ◽  
Self Assembly ◽  
Metal Salts ◽  
Alkali Metal Salts

scholarly journals Separation of ethylene glycol and alkali metal salts on carbon nanotubes and mosaic membranes

2018 ◽  
Vol 84 (6) ◽  
pp. 11-17
Author(s):  
N. V. Belyakova ◽  
E. V. Butyrskaya ◽  
V. F. Selemenev ◽  
V. A. Shaposhnik
Keyword(s):  
Carbon Nanotubes ◽  
Alkali Metal ◽  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Potassium Chloride ◽  
Solid Phase ◽  
Chromatographic Determination ◽  
Metal Salts ◽  
Alkali Metal Salts ◽  
Alkali Metal Chloride

A method for separation of ethylene glycol (EG) and alkali metal salts in aqueous solutions is developed using solid-phase extraction on carbon nanotubes (CNT) and dialysis with a domestic mosaic membrane AK-45. Both methods enable effective separation of the components of EG + NaCl (KCl) aqueous solution which is necessary for gas chromatographic determination of EG in the mixtures. Hydrophobic-hydrophilic interactions in the EG – water – CNT system provide efficient sorption of EG and almost zero sorption of potassium chloride by CNT. Coefficients of EG and KCl separation on Dealtom carbon nanotubes range within 7 – 15 (for 0.001 ≤C0 EG≤ 0.1, 0.001 ≤C0 KCl≤ 0.1 mol/liter), EG extraction rate is 86 – 94% for single extraction. CNT practically do not absorb potassium chloride. High and low permeability of mosaic membranes for metal salts EG, respectively, is a basis for separation of EG and alkali metal salts by dialysis. During a 4-hour dialysis, 96% and 87% of NaCl (C0= 0.001 mol/dm3andC0= 0.01 mol/dm3, respectively), are transferred as NaCl through the AK-45 membrane (86% and 82% for KCl). At the same time an amount of less than 3% EG (C0= 0 mol/dm3) is transferred during dialysis through AK-45 membrane. Mosaic membrane AK-45 appeared to be the most effective one regarding the transfer of alkali metal salts from low-mineralized aqueous solutions, unlike traditional ion-exchange membranes in the absebce of such transfer due to the Donnan phenomenon. Coefficients of alkali metal chloride and EG separation by dialysis with an AK-45 membrane range within 13 – 38, which indicates to their rather efficient separation.

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