LEWATIT MONOPLUS SR-7

Lewatit® MonoPlus SR 7 – High-Selectivity Anion Exchange Resin for Nitrate Removal

Appearance: White to yellowish, opaque spherical beads

• Polymer Matrix: Polystyrene crosslinked with divinylbenzene

• Functional Group: Quaternary ammonium

• Ionic Form as Supplied: Chloride (Cl ⁻ )

• Type: Macroporous, monodisperse anion exchange resin

Application:

• Selective nitrate (NO ₃⁻ ) removal from potable, waste, and process water

• Used in small municipal water systems and residential cartridge filters

• Removes nitrite, iodide, bromide, perchlorate, chlorate, and bromate

• Suitable for aquarium and fish farming water purification

• Effective in chlorate removal from concentrated caustic solutions

Description:  
Lewatit® MonoPlus SR 7 is a highly selective, macroporous anion exchange resin based on monodisperse polystyrene beads. Engineered for superior nitrate adsorption, it offers three times the selectivity of conventional resins—making it ideal for removing nitrate from sulfate-containing waters without the risk of nitrate dumping. The resin ensures safe and efficient performance in both residential and small-scale municipal systems.

It also shows strong affinity for other problematic anions, including perchlorate, nitrite, and bromate, offering broad-spectrum contaminant control in diverse water treatment environments.

Key Features:

• Exceptional nitrate selectivity vs. sulfate

• Monodisperse beads ensure low pressure drop and high flow uniformity

• No nitrate dumping, even in high sulfate waters

• Ideal for point-of-use and point-of-entry systems

• Certified for potable water use (country-specific certifications available)

• Requires special start-up procedure when used in drinking water applications (available on request)

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