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Zeolite, Ion-exchange Beds, Water Purification, Soil Treatment

Posted at: Offers to Sell and Export | Posted on: Wed 24 Sep, 2008 9:28 am |
zeolite ion exchange beds water purification soil treatment
Products Photos CatalogZeolite Ion Exchange Photos Catalog

Zeolites (Greek, zein, "to boil"; lithos, "a stone") are minerals that have a micro-porous structure.

"stone that boils," They are basically hydrated alumino-silicate minerals with an "open" structure that can accommodate a wide variety of cations, such as Na+, K+, Ca2+, Mg2+ and others. Natural zeolites form where volcanic rocks and ash layers react with alkaline groundwater. 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. The maximum size of the molecular or ionic species that can enter the pores of a zeolite is controlled by the diameters of the tunnels. These are conventionally defined by the ring size of the aperture, where, for example, the term "8ring" refers to a closed loop that is built from 8 tetrahedrally coordinated silicon (or aluminium) atoms and 8 oxygen atoms. These rings are not always perfectly flat and symmetrical due to a variety of effects, including strain induced by the bonding between units that are needed to produce the overall structure, or coordination of some of the oxygen atoms of the rings to cations within the structure. Therefore, the pore openings for all rings of one size are not identical.


Commercial and Domestic

Zeolites are widely used as ion-exchange beds in domestic and commercial water purification, softening, and other applications. In chemistry, zeolites are used to separate molecules, as traps for molecules so they can be analyzed.

Zeolites have the potential of providing precise and specific separation of gases including the removal of H2O, CO2 and SO2 from low-grade natural gas streams. Other separations include: noble gases, N2, freon and formaldehyde.

Petrochemical industry

Synthetic zeolites are widely used as catalysts in the petrochemical industry, for instance in fluid catalytic cracking and hydro-cracking. Zeolites confine molecules in small spaces, which causes changes in their structure and reactivity.

Nuclear Industry

Zeolites have uses in advanced reprocessing methods, where their micro-porous ability to capture some ions while allowing others to pass freely allow many fission products to be efficiently removed from nuclear waste and permanently trapped. Equally important are the mineral properties of zeolites. Their alumino-silicate construction is extremely durable and resistant to radiation even in porous form. Additionally, once they are loaded with trapped fission products, the zeolite-waste combination can be hot pressed into an extremely durable ceramic form, closing the pores and trapping the waste in a solid stone block. This is a waste form factor that greatly reduces its hazard compared to conventional reprocessing systems.


In agriculture, clinoptilolite (a naturally occurring zeolite) is used as a soil treatment. It provides a source of slowly released potassium. If previously loaded with ammonium, the zeolite can serve a similar function in the slow release of nitrogen. Cuban studies in the emerging field of "zeoponics" suggest that some crops may be grown in 100% zeolite or zeolite mixtures in which the zeolite is previously loaded or coated with fertilizer and micronutrients. Zeolites can also act as water moderators, in which they will absorb up to 55% of their weight in water and slowly release it under plant demand. This property can prevent root rot and moderate drought cycles.

A potting soil with 12% clinoptilolite was shown to harvest morning dew and return it to the plant roots for reuse. The same bed was able to grow a Jerico strain of leaf lettuce in a sub tropical climate without external water and daytime temperatures exceeding 85 °F. This produce did not bolt and went full term before setting seeds. It also has been shown that certain zeolites can reduce nitrates and nitrites to more plant usable free nitrogen by ion exchange.


SiO2 70.19-75.90

Al2O3 9.90-11.81

Fe2O3 1.55-4.90

CaO 2.35-3.30

K2O 0.10-3.10

Na2O 2.00-2.26

C.E.C 150-160

PH(H2O) 7.5-7.6

Company Contact:

Ivyvleon photo
Contact Name: Ivy Chen
Company Name: Changsha Xianshanyuan Agriculture & Technology Co., Ltd
Email: Email
Tel: 86-731-4464008
Fax: 86-731-4460498
Street Address: Room17-22 28/f Centre
Of City, 235 Wuyi Rd, Changsha, Hunan,
Website: http://www.teaseedpowder.cn
Member name: Ivyvleon
Country: China-CN China
Member Since: 24 September 2008
Total Leads: 13 Ivyvleon Import Export Business Leads
Business focus: Saponin Powder, Glyphosate, Potassium Humate, Humic Acid, Fulvic Acid, Sodium Humate, Monosultap, Bisultap, Zeolite, Spirulina, Peptone, Teaseed Mea
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