Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents. The term zeolite was originally coined in 1756 by Swedish mineralogist Axel Fredrik Cronstedt, who observed that upon rapidly heating the material stilbite, it produced large amounts of steam from water that had been adsorbed by the material. Based on this, he called the material zeolite, from the Greek ζέω (zéo̱), meaning “to boil” and λίθος (líthos), meaning “stone”.


Zeolites have a porous structure that can accommodate a wide variety of cations, such as Na+, K+, Ca2+, Mg2+ and others. These positive ions are rather loosely held and can readily be exchanged for others in a contact solution.


Natural zeolites form where volcanic rocks and ash layers react with alkaline groundwater. Zeolites also crystallize in post-depositional environments over periods ranging from thousands to millions of years in shallow marine basins.


Zeolites are the aluminosilicate members of the family of microporous solids known as “molecular sieves.” The term molecular sieve refers to a particular property of these materials, i.e., the ability to selectively sort molecules based primarily on a size exclusion process. This is due to a very regular pore structure of molecular dimensions.

Usage Area


Odor control

Confined animal environmental control

Livestock feed additives



Ammonia filtration in fish hatcheries

Biofilter media



Nurseries, Greenhouses




Tree and shrub transplanting

Turf grass soil amendment

Reclamation, revegetation, landscaping

Silviculture (forestry, tree plantations)

Medium for hydroponic growing

Household Products

Household odor control

Pet odor control

Aquarium Keeping

Cat Litter


Industrial Products

Absorbents for oil and spills

Gas separations


Radioactive Waste

Site remediation/decontamination


Water Treatment

Water filtration

Heavy metal removal

Swimming pools


Wastewater Treatment

Ammonia in municipal sludge

Heavy metal removal

Septic leach fields