Electrodialysis of various electrolytes using heterogeneous and homogeneous membranes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F16%3AN0000075" target="_blank" >RIV/28676092:_____/16:N0000075 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Electrodialysis of various electrolytes using heterogeneous and homogeneous membranes

Original language description

Aim of this work was to investigate electrodialysis desalination of monovalent and divalent ions with different types of ion exchange membranes. Since properties of membranes determine the performance of electrodialysis, two types of membranes were used – homogeneous and heterogeneous. Heterogeneous Ralex® membranes and homogeneous Fujifilm membranes were used in tested ED stacks. Electrodialysis of four different electrolytes was performed. As salts were used Na2SO4, NaNO3, Ca(NO3)2 and MgSO4. Solutions of each one of these salts in demineralized water were prepared with conductivity 20 mS.cm-1. Electrodialysis of solutions was done on laboratory ED stacks with 10 membrane pairs with voltage 10 V. Recirculation batch mode has been applied with flow rates of diluate, concentrate and electrode solution 50 l.h-1. Firstly, desalination characteristics of the stack with heterogeneous membranes were measured and then measurements with homogeneous membranes took place. Conductivity of diluate on input and output side of the stack and conductivity of concentrate on the output side were recorded in regular intervals. Process was stopped after the diluate conductivity on the input fell below 1 mS.cm-1. Analysis of results confirmed that homogeneous membranes remove some types of ions faster in comparison to heterogeneous membranes due to their lower electrical resistance and better permselectivity. However, worse selectivity of Fujifilm homogeneous membranes had been proved for divalent cations.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JP - Industrial processes and processing

OECD FORD branch

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Project

<a href="/en/project/LO1418" target="_blank" >LO1418: Progressive development of the Membrane Innovation Centre</a><br>

Continuities

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

Publication year

2016

Confidentiality

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.

Article name in the collection

Proceedings 43rd International Conference of Slovak Society of Chemical Engineering

ISBN

978-80-89597-35-2

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

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Publisher name

Slovak Society of Chemical Engineering

Place of publication

Bratislava

Event location

Tatranské Matliare

Event date

May 23, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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