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Statements

Subject Item
n2:RIV%2F28676092%3A_____%2F14%3A%230000337%21RIV15-MPO-28676092
rdf:type
n13:Vysledek skos:Concept
dcterms:description
Selectivity, permselectivity, and conductivity are the main ion-exchange membrane parameters. While permselectivity determines how well the membrane separates cations from anions, the selectivity determines how well the membrane transports uni- and multivalent ions. On the other hand, conductivity determines how fast the ions are transported through the membrane. All these parameters depend on many other factors, especially on the membrane structure. It is difficult to develop highly selective (permselective) and highly conductive heterogeneous ion-exchange membranes. Reason for this is porosity: while the conductivity increases with increasing porosity, the selectivity and permselectivity decreases. This work was focused on increasing the selectivity and, at the same time, the conductivity of heterogeneous ion-exchange membranes. It was found that most of the techniques of modification of homogeneous membranes cannot be used with modification heterogeneous ion-exchange membranes. It appears that the choice of a polymer matrix is a key factor in the preparation of heterogeneous ion-exchange membranes with high selectivity to monovalent ions and also high permselectivity while maintaining the same, even a higher conductivity. Selectivity, permselectivity, and conductivity are the main ion-exchange membrane parameters. While permselectivity determines how well the membrane separates cations from anions, the selectivity determines how well the membrane transports uni- and multivalent ions. On the other hand, conductivity determines how fast the ions are transported through the membrane. All these parameters depend on many other factors, especially on the membrane structure. It is difficult to develop highly selective (permselective) and highly conductive heterogeneous ion-exchange membranes. Reason for this is porosity: while the conductivity increases with increasing porosity, the selectivity and permselectivity decreases. This work was focused on increasing the selectivity and, at the same time, the conductivity of heterogeneous ion-exchange membranes. It was found that most of the techniques of modification of homogeneous membranes cannot be used with modification heterogeneous ion-exchange membranes. It appears that the choice of a polymer matrix is a key factor in the preparation of heterogeneous ion-exchange membranes with high selectivity to monovalent ions and also high permselectivity while maintaining the same, even a higher conductivity.
dcterms:title
Increasing selectivity of heterogeneous ion-exchange membrane Increasing selectivity of heterogeneous ion-exchange membrane
skos:prefLabel
Increasing selectivity of heterogeneous ion-exchange membrane Increasing selectivity of heterogeneous ion-exchange membrane
skos:notation
RIV/28676092:_____/14:#0000337!RIV15-MPO-28676092
n3:aktivita
n10:P
n3:aktivity
P(FR-TI4/507)
n3:cisloPeriodika
2014/1 5
n3:dodaniDat
n16:2015
n3:domaciTvurceVysledku
n9:2537982 n9:9969039 n9:3056090
n3:druhVysledku
n11:J
n3:duvernostUdaju
n15:C
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
21157
n3:idVysledku
RIV/28676092:_____/14:#0000337
n3:jazykVysledku
n6:eng
n3:klicovaSlova
ion-exchange membrane; selectivity; permselectivity
n3:klicoveSlovo
n12:permselectivity n12:ion-exchange%20membrane n12:selectivity
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[B6A6E4817105]
n3:nazevZdroje
Desalination and Watet Treatment
n3:obor
n17:JP
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n8:FR-TI4%2F507
n3:rokUplatneniVysledku
n16:2014
n3:svazekPeriodika
2014/1 5
n3:tvurceVysledku
Křivčík, Jan Neděla, David Brožová, Libuše Hadrava, Jaroslav
s:issn
1944-3986
s:numberOfPages
7