Affecting monovalent selectivity of ion-exchange membranes: effect of surface modification and applies voltage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F16%3AN0000066" target="_blank" >RIV/28676092:_____/16:N0000066 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Affecting monovalent selectivity of ion-exchange membranes: effect of surface modification and applies voltage

Popis výsledku v původním jazyce

Today, reduction of nitrates content is a great challenge not only in potable water production but also in food industry, especially in dairy products. In many applications it is neither necessary nor desirable to remove all present ions from treated solution, but e.g. only as said nitrates. Nowadays, attention is paid to electrodialysis as a promising technique for selective demineralization. In this work we deal with selectivity adjustment of heterogeneous anion-exchange membranes (AEMs) AM(H)-PES Ralex® using surface modification with polymer film based on perfluorosulfonic acid. In the next step the influence of applied voltage on course of electrodialysis was investigated. For individual AEMs the batch desalination process of mixed equimolar solution containing NaNO3, NaCl, NaH2PO4 and Na2SO4 was evaluated as well as selective transport of individual anions. The measurements suggest that there was a time extension in the case of modified AM(H)-PES. With respect to selectivity, all AEMs show slight decline of selectivity eventually unchanged values with higher applied voltage besides to lower voltage. Any AEM appeared to have no selectivity for same charged ions with similar size, regardless applied voltage. However, it was confirmed that it is possible to increase somewhat the selectivity of mono and divalent ions as well as selectivity of H2PO4− and Cl− or NO3− by voltage lowering.

Název v anglickém jazyce

Affecting monovalent selectivity of ion-exchange membranes: effect of surface modification and applies voltage

Popis výsledku anglicky

Today, reduction of nitrates content is a great challenge not only in potable water production but also in food industry, especially in dairy products. In many applications it is neither necessary nor desirable to remove all present ions from treated solution, but e.g. only as said nitrates. Nowadays, attention is paid to electrodialysis as a promising technique for selective demineralization. In this work we deal with selectivity adjustment of heterogeneous anion-exchange membranes (AEMs) AM(H)-PES Ralex® using surface modification with polymer film based on perfluorosulfonic acid. In the next step the influence of applied voltage on course of electrodialysis was investigated. For individual AEMs the batch desalination process of mixed equimolar solution containing NaNO3, NaCl, NaH2PO4 and Na2SO4 was evaluated as well as selective transport of individual anions. The measurements suggest that there was a time extension in the case of modified AM(H)-PES. With respect to selectivity, all AEMs show slight decline of selectivity eventually unchanged values with higher applied voltage besides to lower voltage. Any AEM appeared to have no selectivity for same charged ions with similar size, regardless applied voltage. However, it was confirmed that it is possible to increase somewhat the selectivity of mono and divalent ions as well as selectivity of H2PO4− and Cl− or NO3− by voltage lowering.

Druh

D - Stať ve sborníku

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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Projekt

<a href="/cs/project/LO1418" target="_blank" >LO1418: Progresivní rozvoj Membránového inovačního centra</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Název statě ve sborníku

Book of Abstracts PERMEA & MELPRO 2016

ISBN

978-80-904517-6-6

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

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Název nakladatele

Czech Membrane Platform

Místo vydání

Pardubice

Místo konání akce

Praha

Datum konání akce

15. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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