Clinoptilolite Zeolite Filter Media (Ammonia Removal & Softening)
Natural clinoptilolite zeolite is a hydrated aluminosilicate (Si/Al ~5) with high cation-exchange capacity (CEC 130-180 meq/100 g) selective for NH₄⁺, Cs⁺, Pb²⁺, and Ca²⁺. Used as a polishing filter media for ammonia-nitrogen removal in municipal sewage tertiary treatment, aquaculture water, and as a softening medium replacing or supplementing ion-exchange resins. Major Chinese deposits in Henan, Jilin, Zhejiang.
Especificaciones Técnicas
| appearance | Light green to white angular granules |
| Si/Al ratio | 4.5-5.5 |
| mesh ranges | 8-16, 16-30, 30-60 (commonly stocked) |
| bulk density | 0.85-0.95 g/cm³ |
| Mohs hardness | 3.5-4.0 |
| particle size | 0.25-2.4 mm (mesh-dependent) |
| clinoptilolite content | ≥ 80 wt% (premium); ≥ 65 wt% (standard) |
| CEC (cation exchange capacity) | 130-180 meq / 100 g |
Aplicaciones
- Ammonia-nitrogen (NH₃-N) removal in municipal sewage polishing (1-5 mg/L → <0.5 mg/L)
- Aquaculture water filtration (fish farms, shrimp ponds) — removes toxic NH₃
- Drinking water softening — Ca²⁺ / Mg²⁺ exchange for hard water
- Heavy metal capture in industrial wastewater (Pb²⁺, Cd²⁺, Cu²⁺)
- Radionuclide capture (Cs⁺, Sr²⁺) in nuclear wastewater treatment
- Soil amendment and slow-release fertilizer carrier
Características Principales
- High selectivity for NH₄⁺ vs Na⁺/K⁺ — works in moderate hardness water without saturation
- Regenerable with NaCl brine (10-15%, same as IX resin) — multi-cycle service
- Lower cost per kg than synthetic IX resin for the same NH₃-N capacity
- Non-toxic, food-safe — approved for aquaculture and drinking water polishing
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