Separation of sodium and calcium chloride using electrodialysis with monovalent-ion-selective membranes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F19%3AN0000098" target="_blank" >RIV/28676092:_____/19:N0000098 - isvavai.cz</a>

Výsledek na webu

<a href="https://sscheconference.sk/papers/list/2" target="_blank" >https://sscheconference.sk/papers/list/2</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Separation of sodium and calcium chloride using electrodialysis with monovalent-ion-selective membranes

Popis výsledku v původním jazyce

With recent environmental legislation, selective separation of monovalent and divalent ions from industrial brines represents a subject of growing concern, because it enables recovery of salts and water reuse, thus reducing operating costs as well as amount of waste brines. Although removal of divalent ions from reverse osmosis concentrates can be achieved by electrodialysis (ED) using monovalent-ion-selective membranes, its applicability at higher concentrations of divalent ions needs further research, as this method could be less energy demanding than nanofiltration coupled with conventional ED. Laboratory-scale ED stack with monovalent-ion-selective membranes was used to perform a series of experiments in order to separate sodium chloride from a model solution, which represented an effluent brine produced by industrial water softening plants. Firstly, transport of sodium chloride was studied in a single solution ED. Secondly, experiments with the model solution of calcium chloride (16 wt. %) and sodium chloride (5 wt. %) were undertaken. The experiments revealed that the transfer of calcium and sodium ions through cation exchange membranes was similar and, moreover, the presence of calcium ions decreased sodium ions flux by approximately 30%. Therefore monovalent selective ED is not viable for managing such brines.

Název v anglickém jazyce

Separation of sodium and calcium chloride using electrodialysis with monovalent-ion-selective membranes

Popis výsledku anglicky

With recent environmental legislation, selective separation of monovalent and divalent ions from industrial brines represents a subject of growing concern, because it enables recovery of salts and water reuse, thus reducing operating costs as well as amount of waste brines. Although removal of divalent ions from reverse osmosis concentrates can be achieved by electrodialysis (ED) using monovalent-ion-selective membranes, its applicability at higher concentrations of divalent ions needs further research, as this method could be less energy demanding than nanofiltration coupled with conventional ED. Laboratory-scale ED stack with monovalent-ion-selective membranes was used to perform a series of experiments in order to separate sodium chloride from a model solution, which represented an effluent brine produced by industrial water softening plants. Firstly, transport of sodium chloride was studied in a single solution ED. Secondly, experiments with the model solution of calcium chloride (16 wt. %) and sodium chloride (5 wt. %) were undertaken. The experiments revealed that the transfer of calcium and sodium ions through cation exchange membranes was similar and, moreover, the presence of calcium ions decreased sodium ions flux by approximately 30%. Therefore monovalent selective ED is not viable for managing such brines.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

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

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 46th International Conference of SSCHE

ISBN

978-80-8208-011-0

ISSN

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e-ISSN

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Počet stran výsledku

3

Strana od-do

174

Název nakladatele

Slovak Society of Chemical Engineering

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare, Slovenská Republika

Datum konání akce

20. 5. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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