Ion Exchange
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| Audience/Grade: | College Freshman-Graduate |
| Discipline(s): |
Environmental Engineering Geological Engineering |
| Special Topic(s): | |
| Learning Resource Type: |
Teaching - Tutorial |
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| Description: | An ion exchange resin is a polymer with electrically charged sites at which one ion may replace another. Natural soils contain solids with charged sites that exchange ions, and certain minerals called Zeolites are quite good exchangers. Ion exchange also takes place in living materials because cell walls, cell membranes, and other structures have charges. In natural waters and in wastewater, there are often undesirable ions and some of them may be worth recovering. For example, cadmium ion is dangerous to health but is not present usually at concentrations that would justify recovery. On the other hand, silver ion in photographic wastes is not a serious hazard, but its value is quite high. In either case, it makes sense to substitute an ion such as sodium for the ion in the wastewater. - Chemistry of ion exchange polymers - Hardness - Relative affinities of ions - Continuous Ion Exchange - Theory - Mixed bed Exchanger - Ion Exchange Resins |
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| Use of Resource: |
Tutorial on ion exchange. |
| Difficulty: |
Medium |
| Interactivity Level: |
Low |
| Version Info | |
| Publication Date: | January 1998 |
| Platform/Format: |
WWW |
| Cost: |
Free |
| Download URL: | http://www.rpi.edu/dept/chem-eng/Biotech-Environ/IONEX/ionex.htm |
| Metadata: |
IEEE LOM Record |
| Collection: |
NEEDS
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