Abstract

In recent years, the study on the micro-nanochannel in the microfluidic technology has been made significant progress for which when inner walls charged can function similarly as ion permselective membrane. This article constructed one symmetric model with three parallel microchannels connected with two sets of nanochannel arrays and explained the mechanism of desalination within the channel by using numerical simulation method. For example, when the voltage difference, Vcn, across the nanochannel array is equal to 10 VT, the desalting efficiency can have reached nearly 90%; as the Vcn is increased continuously to 20VT, the desalination rate will definitely exceed 99% and as the Vcn increases the rate increases more slowly.

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