Abstract/Details

Study of ion exchange media with impedance spectroscopy


2001 2001

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Abstract (summary)

The ion exchange process is a cost-effective technique that is commonly used to selectively remove detrimental ions from the influent. Typical applications include softening of rural and other water supplies and deionization of water for industrial use. While strong acid cation exchange resins are used to remove the detrimental ions from the urban water supply, the potential of nitrate contamination is still a real concern that can be addressed with strong base anion exchangers. Recent developments have demonstrated that the depletion of an ion exchange bed can be monitored in a water softener or via a remote sensor using impedance measurement techniques. In this study, a frequency of approximately 10 kHz was selected to measure the impedance of the ion exchange bed throughout the regeneration and depletion cycle.

Impedance spectroscopy has been used to characterize the electrical behavior of an ion exchanger and has identified two distinct regions which are representative of the bulk and interfacial behavior of the ion bead. Subsequent equivalent circuit modeling of these results provides insight into the behavior of selected anion and cation resins and identifies resins that exhibit distinct electrical performance suitable for sensor applications. This measurement procedure provides an in-situ technique, which can assess the influence of ion exchange operation or manufacturing variables.

Indexing (details)


Subject
Electrical engineering;
Environmental engineering
Classification
0544: Electrical engineering
0775: Environmental engineering
Identifier / keyword
Applied sciences; Impedance spectroscopy; Ion exchange; Nitrate contamination
Title
Study of ion exchange media with impedance spectroscopy
Author
Eidler, Phillip Alan
Number of pages
118
Publication year
2001
Degree date
2001
School code
0116
Source
DAI-B 62/10, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780493407265, 049340726X
Advisor
Seitz, Martin
University/institution
Marquette University
University location
United States -- Wisconsin
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3028647
ProQuest document ID
304706294
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304706294
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