Separation Ability

One of the most important uses of ion exchange membranes is the selective separation of solutes. This can be performed because of the differences in the rates at which solutes permeate through the membrane. The size of this difference depends on the separation system, i.e. on the composition of feed solution and the membrane. The criterion of separation is that the composition of the mixture emerging from the membrane cell should be different from that entering on the feed side. Consequently, the separation factor aA measures the extent of selective transport of A in relation to B:


where JA and JB are the fluxes (transport rates expressed as numbers of moles issuing from the membrane per unit area and time) and XA and XB are the mole fraction of A and B in the feed.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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