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Effect of channel geometry on ion-concentration polarization-based preconcentration and desalination

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F19%3A43958960" target="_blank" >RIV/49777513:23640/19:43958960 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/60461373:22340/19:43919674

  • Výsledek na webu

    <a href="https://aip.scitation.org/doi/10.1063/1.5124787" target="_blank" >https://aip.scitation.org/doi/10.1063/1.5124787</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1063/1.5124787" target="_blank" >10.1063/1.5124787</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Effect of channel geometry on ion-concentration polarization-based preconcentration and desalination

  • Popis výsledku v původním jazyce

    Polarization of the ion-selective systems results in the formation of ion-depleted and ion-concentrated zones in the electrolyte layers adjacent to the system. One can employ ion-concentration polarization for the removal of chargedlarge molecules and small ions from the flowing liquid. Removal of large molecules from the flowing solution and their local accumulation is often referred to as preconcentration, removal of small ions as desalination. Here, we study the effect of the channel geometry on the removal of charged species from their water solutions experimentally. Straight, converging, and diverging channels equipped with a pair of heterogeneous cation-exchange membranes are compared in terms of their effect on preconcentration of an observable fluorescein dye and on desalination of water solution of potassium chloride. Our results show that preconcentration of the dye is not significantly affected by the channel geometry. The distance of the preconcentration band from one of the membranes was approximately the same in all tested channel geometries. The major difference was in the location of the band within the channel, when the conical channels localized the band at one of the channel walls. The straight channel showed a slightly broader range of applicable flow rates. The semibatch desalination of 0.01M KCl solution turned out to be more efficient in conical channels, which was associated with a larger volume of the channel available for the accumulation of the concentratedsolution. Our results suggest that conical channels can be advantageously used in transforming the ion-concentrationpolarization- based semibatch desalination into a fully continuous one.

  • Název v anglickém jazyce

    Effect of channel geometry on ion-concentration polarization-based preconcentration and desalination

  • Popis výsledku anglicky

    Polarization of the ion-selective systems results in the formation of ion-depleted and ion-concentrated zones in the electrolyte layers adjacent to the system. One can employ ion-concentration polarization for the removal of chargedlarge molecules and small ions from the flowing liquid. Removal of large molecules from the flowing solution and their local accumulation is often referred to as preconcentration, removal of small ions as desalination. Here, we study the effect of the channel geometry on the removal of charged species from their water solutions experimentally. Straight, converging, and diverging channels equipped with a pair of heterogeneous cation-exchange membranes are compared in terms of their effect on preconcentration of an observable fluorescein dye and on desalination of water solution of potassium chloride. Our results show that preconcentration of the dye is not significantly affected by the channel geometry. The distance of the preconcentration band from one of the membranes was approximately the same in all tested channel geometries. The major difference was in the location of the band within the channel, when the conical channels localized the band at one of the channel walls. The straight channel showed a slightly broader range of applicable flow rates. The semibatch desalination of 0.01M KCl solution turned out to be more efficient in conical channels, which was associated with a larger volume of the channel available for the accumulation of the concentratedsolution. Our results suggest that conical channels can be advantageously used in transforming the ion-concentrationpolarization- based semibatch desalination into a fully continuous one.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    20402 - Chemical process engineering

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Ostatní

  • Rok uplatnění

    2019

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Biomicrofluidics

  • ISSN

    1932-1058

  • e-ISSN

  • Svazek periodika

    13

  • Číslo periodika v rámci svazku

    6

  • Stát vydavatele periodika

    US - Spojené státy americké

  • Počet stran výsledku

    11

  • Strana od-do

    "NESTRÁNKOVÁNO"

  • Kód UT WoS článku

    000505984000006

  • EID výsledku v databázi Scopus

    2-s2.0-85074538452