Testing of selectivity of anion exchange membranes depending on the ion exchange groups

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F17%3AN0000045" target="_blank" >RIV/28676092:_____/17:N0000045 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Testing of selectivity of anion exchange membranes depending on the ion exchange groups

Original language description

In this work, three different kinds of anion exchange membranes with distinct anion exchange resins, AM-SBG1-HP, AM-SBG2-HP and AM-SIR-100-HP, were prepared and their selectivity for nitrate ions were compared by making electrodialysis tests and analyzing the nitrate concentration afterwards. A comparison with the standard anion exchange membrane of the company, AM(H)-PES, have also been made. AM(H)-PES and AM-SBG1-HP contain type 1 anions exchange resins (AERs), which means the functional group of the used AERs is trimethylamine. AM-SBG2-HP contains type 2 of AER, its functional group is dimethylethanolamine. AM-SIR-100-HP has a special type of AER, so called nitrate selective, which is supposed to have a higher selectivity for nitrate ions because of its functional group, the triethylamine. This modification increases the charge separation distance and the resin hydrophobicity [1], making it more difficult for divalent ions such as sulfate to attach themselves to the membrane. After the production, the membranes were put into the demineralized water bath and later, the AM-SIR-100-HP presented a large amount of bubbles, making it impossible to use these membranes in electrodialysis. For AM(H)-PES, AM-SBG1-HP and AM-SBG2-HP, two electrodialysis tests were conducted, one with positive polarity and the other with negative one. The solution used was composed of NaCl, NaNO3, NaH2PO4, Na2SO4, every salt of concentration 0.05 mol L-1. During the electrodialysis tests, samples from the dilute chamber were taken regularly and the ions concentration was measured afterwards by ion chromatography. As expected for nitrate ions removal, all three membranes have a higher selectivity for nitrate ions than for the other ones, although the selectivity for nitrate and chloride ions was very similar for all types of membrane. Therefore, the affinity relationship of the membranes.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

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

2017

Confidentiality

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

Article name in the collection

Workshop of Students’ Presentations 2017, Membranes and Membrane Processes

ISBN

978-80-906831-0-5

ISSN

—

e-ISSN

—

Number of pages

15

Pages from-to

—

Publisher name

Czech Membrane Platforms

Place of publication

Česká Lípa

Event location

Stráž pod Ralskem

Event date

Oct 18, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—