RESIN for NITRATES ANION EXCHANGE Purolite A520E

Purolite A520E – an anion resin for effective nitrate removal

Purolite A520E is a macroporous, strongly basic anion exchange resin in chloride form (Cl-), specifically designed for the selective removal of nitrates from water. The media is made of hard, clear, spherical beads and stands out with high working capacity, which makes it suitable for drinking water denitrification systems and installations intended for contact with food.

The resin is designed for use in domestic and industrial denitrification units whose construction corresponds to typical water softeners. As a result, it can be used in solutions where predictable operation, convenient regeneration, and stable performance parameters of the entire water treatment system are important.

Main benefits

• effective removal of nitrates from water,
• macroporous, strongly basic anion resin with high capacity,
• Cl- ionic form intended for use in denitrification units,
• application in domestic and industrial installations,
• suitable for drinking water treatment and systems in contact with food,
• regeneration with common rock salt (NaCl) solution,
• operation similar to systems working like a standard water softener,
• PZH certification for water treatment intended for consumption purposes,
• 1 liter package – convenient for media replenishment or servicing.

Application

Purolite A520E is used wherever it is necessary to reduce the nitrate content in water. The media performs well in denitrification units used in homes, commercial facilities, and industrial installations. Due to the structural similarity of the devices to classic softeners, the resin can be implemented in proven pressure systems used in modern water filtration systems.

The product can operate as part of a specialized water treatment system where a standard reverse osmosis filter, osmotic filter, reverse osmosis system, or reverse osmosis is not the only or final solution for the entire installation. In practice, A520E is a good choice for dedicated denitrification units requiring a regenerable ion exchange media.

Construction and properties of the media

The resin is based on a macroporous polymer matrix made of styrene with DVB. This structure supports stable operation of the media and enables its use in systems intended for long-term operation. The beads have a spherical, transparent form, and the high sphericity promotes uniform flow through the bed.

Purolite A520E is a high-capacity media in the form of beads. The additional purification process used during production allows this resin to be used in installations intended for drinking water treatment and in systems in contact with food.

Physical and chemical characteristics

• polymer matrix structure: macroporous styrene with DVB,
• functional group: R-N-R3+Cl-,
• ionic form: Cl-,
• appearance and physical form: clear spherical beads,
• sphericity: min. 95%,
• particle size: 16-50 mesh, wet,
• bead size range: +1.2 mm < 5%, -0.3 mm < 1%,
• uniformity coefficient: max. 1.6,
• moisture content, Cl- form: 52-56%,
• bulk density, Cl- form: 680-730 g/l (42-45.5 lbs/cu.ft),
• total ion exchange capacity: 1.0 eq/l min,
• pH range: 0-14.

Operation and regeneration

After the working capacity of the resin is exhausted and nitrates appear in the effluent, the media is renewed by regeneration with a common rock salt solution. This process is analogous to regeneration known from other ion exchange media operating in devices built similarly to softeners. The achieved working capacity depends largely on the amount of salt used for regeneration.

Suggested operating conditions

• maximum temperature: max. 100°C (212°F),
• working ion exchange capacity: ≥ 0.3 meq/l (wet),
• regeneration: NaCl,
• regenerant concentration: 8-10% NaCl; resin vol. = 2-3 : 1,
• flow rate: 4-6 m/h,
• contact time: 30-60 minutes,
• slow rinse flow rate: 15-25 m/h,
• slow rinse time: approx. 25 min.,
• service flow rate: 15-25 m/h.

Package contents

A520E anion resin is packed in bags and contains 1 liter of resin. One package corresponds to 1 liter of ion exchange media.

Technical specification

FAQ