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Updated: Jan 27, 2026

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing
Published on: February 13, 2016
Fractionation of mono- and divalent ions by capacitive deionization with nanofiltration membrane
Shudi Mao1, Ling Chen1, Yi Zhang1
1Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science, East China Normal University, 3663 North Zhongshan Road, 200062 Shanghai, China.
Abstract:
In this study, we demonstrated the influence of adding nanofiltration membranes to a CDI cell, when desalinating mono- and divalent salt solutions both theoretically and experimentally, and proposed a new procedure for the separation of mono- and divalent ions. It is revealed that the distinction of the diffusion coefficient between mono- and divalent ions is the key to the effective separation. Combined with the appropriate time of adsorption (1.5 h), the concentration ratio of NaCl to MgSO4 can be increased by a factor of 3, from a mixture with equal amount of NaCl and MgSO4.
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