Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10386368 | Desalination | 2005 | 9 Pages |
Abstract
A purification process of making use of electret technology for efficient but cost effective deionization was discussed in this paper. Douglas MacGregor claimed that PTFE electret works as a means of ions separation for desalination due to the polarization of an electrolyte and ions migration under a permanent electrostatic field generated by a pair of electrets with opposite polarities. The electrostatic field attracts counter-ions to the charged solid surface, and thus generates a purified effluent in the mainstream. Theoretical and experimental analyses were made to investigate the practicality of desalination by electret technology. It is found that MacGregor's design is meaningful only for a dilute electrolyte or a system with very high surface charge density because the number of the counter-ions attracted to the surface is limited and cannot exceed that of the surface charges at the electret.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Haifeng Ni, Robert C. Amme, Yan Jin,