LEWATIT® MonoPlus SR 7

Summary

Product identification

• Product Name: LEWATIT® MonoPlus SR 7
• Product Type: Macroporous, monodisperse, polystyrene-based anion exchange resin for selective adsorption of nitrate.
• Edition: 2020-01-21

Applications

LEWATIT® MonoPlus SR 7 is suitable for:

• Removal of nitrate from waste and process water
• Removal of nitrate from aquarium and fish farming water
• Removal of nitrite (NO₂⁻) from water
• Removal of iodide and bromide from water
• Removal of perchlorate (ClO₄⁻), chlorate (ClO₃⁻), and bromate (BrO₃⁻) from water
• Removal of chlorate (ClO₃⁻) from concentrated caustic (NaOH)

Operating limits

• Stability pH range: 0-14
• Stability temperature range: 1-80 °C
• Operating temperature: Max. 80 °C
• Operating pH range during exhaustion: 0-10

Feed water

• Selectivity: Three times higher selectivity for nitrates compared to standard commercial anion exchange resins, enabling safe nitrate removal from sulfate-containing waters without nitrate dumping.

Product water

• Not specified.

Electrical

• Not specified.

Mechanical / hydraulic

Specified Data

• Common Description:
  • Delivery form: Cl⁻
  • Functional group: Quaternary amine
  • Matrix: Styrenic
  • Structure: Macroporous
  • Appearance: White, opaque
• Uniformity coefficient: max. 1.1
• Mean bead size (d₅₀): 0.62 mm (± 0.05 mm)
• Total capacity (delivery form): min. 0.6 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment (± 5%): 630 g/L
• Density: approx. 1.02 g/mL
• Water retention (delivery form): approx. 59-64 % by weight
• Volume change (during exhaustion): max. approx. 5 %

Operation

• Bed depth for single column: min. 800 mm
• Backwash bed expansion (at 20°C): 18 % per m/h
• Specific pressure loss (at 15°C): 1.3 kPa·h/m²
• Max. pressure loss during operation: 250 kPa
• Specific flow rate: max. 20 BV/h
• Freeboard during backwash: min. 80-100 vol. %

Regeneration

• NaCl regeneration concentration: approx. 8-10 wt. %
• NaCl regeneration quantity (co-current): min. 80-300 g/L resin
• Regeneration contact time: min. 20 minutes
• Slow rinse (at regeneration flow rate): min. 5 BV
• Fast rinse (at service flow rate): min. 5 BV

Storage

• Recommended storage temperature: Above freezing point of water, dry conditions, without direct sunlight.
• Storage temperature range: -20 to +40 °C
• Storage time: max. 2 years from delivery. Packaging stability is limited to 24 months under recommended storage conditions.
• Frozen resin: Thaw gradually at ambient temperature; do not mechanically handle while frozen.

Safety and Disposal

• Safety: Strong oxidants (e.g., nitric acid) can cause violent reactions. Observe the safety data sheet.
• Disposal: Dispose according to European waste nomenclature within the European Community.

---

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror