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Related Experiment Video

Updated: Oct 10, 2025

Small Volume 1-3L Filtration of Coastal Seawater Samples

Small Volume 1-3L Filtration of Coastal Seawater Samples

Published on: June 19, 2009

Semi-Continuous Desalination and Concentration of Small-Volume Samples.

David Tichý¹, Zdeněk Slouka^1,2

¹Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, 16628 Prague, Czech Republic.

International Journal of Molecular Sciences

|December 10, 2021

Summary

This study introduces a microfluidic electrodialysis system for efficient ion separation. The versatile platform achieves high desalination rates, offering adjustable modes for diverse sample processing.

Keywords:

cation-exchange membranes desalination ion concentration polarization ion separation microfluidics

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Last Updated: Oct 10, 2025

Small Volume 1-3L Filtration of Coastal Seawater Samples

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Published on: June 19, 2009

A Small Volume Procedure for Viral Concentration from Water

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Published on: February 3, 2015

Large Volume 20L+ Filtration of Coastal Seawater Samples

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Published on: June 18, 2009

Area of Science:

Electrochemistry
Separation Science
Microfluidics

Background:

Electrodialysis utilizes electric fields and ion-exchange membranes for ion separation.
Ion-exchange membranes create ion-depleted zones under DC polarization.
Microfluidic systems offer precise control for separation processes.

Purpose of the Study:

To develop and evaluate a microfluidic electrodialysis system for ion separation.
To investigate different operational modes for desalination and concentration.
To demonstrate the system's versatility for processing various aqueous solutions.

Main Methods:

Construction of a microfluidic device incorporating electrodialysis principles.
Testing with a model KCl solution spiked with fluorescein for visual and conductivity analysis.
Manipulation of control parameters to achieve different operational modes: continuous desalination, desalination by accumulation, and unsuccessful desalination.

Main Results:

Successful ion separation demonstrated visually and through conductivity measurements.
Desalination factors ranging from 80% to 100% achieved, depending on the operational mode.
Infinite water recovery observed in 'desalination by accumulation' mode due to zero concentrate production.
Independent control over flow rates and voltage allows for versatile sample processing.

Conclusions:

The developed microfluidic electrodialysis system is a versatile platform for ion separation.
Adjustable operational modes enable tailored desalination and concentration strategies.
The system shows significant potential for efficient water treatment and sample processing applications.