Modelling of Organic Acid Transport in Unsaturated Subsurface System

2020 ◽  
pp. 25-35
Author(s):  
Berlin Mohanadhas ◽  
G. Suresh Kumar
Keyword(s):  
Organic Acid ◽  
Acid Transport ◽  
Organic Acid Transport

scholarly journals Imidazolium-type anion exchange membranes for improved organic acid transport and permselectivity in electrodialysis

2022 ◽  
Author(s):  
Matthew Jordan ◽  
Tanmay Kulkarni ◽  
Dodangodage Senadheera ◽  
Revati Kumar ◽  
Yupo Lin ◽  
...  
Keyword(s):  
Organic Acid ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Acid Transport ◽  
Acid Anion ◽  
Imidazolium Cations ◽  
Organic Acid Anion ◽  
2D Noesy ◽  
Organic Acid Transport

Abstract Most commercial anion exchange membranes (AEMs) deploy quaternary ammonium moieties. Alternative cation moieties have been explored in AEMs for fuel cells, but there are no studies focused examining alternative tethered cations in AEMs for ionic separations – such as organic acid anion transport via electrodialysis. H-cell and conductivity experiments demonstrate that tethered benzyl 1-methyl imidazolium groups in polysulfone AEMs enhance lactate conductivity by 49% and improved lactate anion flux by 24x when compared to a quaternary benzyl ammonium polysulfone AEM. An electrodialysis demonstration with the imidazolium-type AEM showed a 2x improvement in lactate anion flux and 20% improvement in permselectivity when benchmarked against the quaternary ammonium AEM. Molecular dynamics and 2D NOESY NMR revealed closer binding of lactate anions to the imidazolium cations when compared to the quaternary ammonium cation. It is posited that this closer binding is responsible to greater flux values observed with imidazolium-type AEM.

Organic Acid Transport to the Blood from the Corpus Striatum, the Thalamus and the Cerebellum of the Rat

2009 ◽  
Vol 54 (3) ◽  
pp. 177-182 ◽  
Author(s):  
Maria Grabowska-Andén ◽  
Nils-Erik Andén ◽  
Ernst Bárány ◽  
Anneli Magnusson
Keyword(s):  
Organic Acid ◽  
Corpus Striatum ◽  
Acid Transport ◽  
Organic Acid Transport
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