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Natural zeolites are the least-know treasures for environmental pollution control, separation science and technology. Natural zeolites are volcanic minerals with unique characteristics. Their chemical structure classifiers them as hydrated aluminosilicates, comprised of hydrogen, oxygen, aluminum, and silicon, arranged in an interconnecting lattice structure.The arrangement of these elements in a zeolite crystal gives rise to a honeycomb framework with consistent diameter connecting channels that vary in size from 2.5 to 5.0 angstroms, depending on the type of zeolite mineral.
This unique structure makes zeolites different from “other” aluminosilicates (kaolin, bentonite, etc) due to the following special properties:
| Gas adsorption | : | the ability to selectively adsorb molecules of gases and vapors |
| Water absorption/desorption | : | the ability to reversibly absorb/desorb water without any chemical or physical change in the zeolite matrix |
| Ion exchange | : |
the ability to exchange inherent cations for other a basis of ion selectivity |
