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ArsenXnp is a nano-particle based selective resin designed to remove arsenic (arsenate and arsenite) from water. ArsenXnp combines a unique chemistry based on hydrous iron oxide nanoparticles that have a very high affinity for arsenic with a durable, non-friable, spherical polymer substrate. This ideal combination of selectivity and substrate durability means that ArsenXnp can effortlessly remove arsenic by using a lead-lag or parallel design configuration.

Water treatment systems incorporating ArsenXnp are designed and operated using the same engineering guidelines as conventional ion exchange resins. Superior bead strength means fines will not be generated nor will pressure drop be a concern throughout long-term performance. Bead sphericity also ensures plug flow of the raw water through the bed thereby maximizing the arsenic loading per vessel and complete capacity utilization. ArsenXnp is ideal for municipal water treatment plants as well as pointof-
entry (POE) and pointof- use (POU) devices.

ArsenXnp is an ANSI/NSF 61 certified, iron oxide based media that utilizes
nanotechnology to modify the surface chemistry to produce a sorbent media with exceptional affinity and capacity for arsenic – both arsenate and arsenite.

ArsenXnp is built on a traditional ion exchange resin matrix with the following

  • Operates at conventional well head pressures (up to 120 psi)
  • ArsenXnp beads have superior crush strength
  • ArsenXnp product handles like conventional ion exchange resins
  • No fines generation during service or regeneration cycles
  • No need to backwash ArsenXnp during service due to pressure drop concerns
  • ArsenXnp offers minimal pressure drop through resin bed
  • Spherical beads facilitates “plug-flow” through the media
  • High columnar efficiencies and loading
  • Minimal labor needed for operation or change-outs due to very high capacity
  • Ideal for municipal systems and for residential POE & POU devices
  • Currently 12 ArsenXnp pilot plants in operation at municipal and bottled
    water sites
  • Cost effective treatment


  • Whole Beads: 95% min.
  • Service Flow Rates: 20 - 32 BV/h
  • Service Flow Rates: 2.5 - 4 gpm/ft3
  • Bead Size Range: 0.300 - 1.2 mm
  • Bulk Density: 790 - 820 g/l
  • Arsenic Capacity: 0.5 - 4.0 As/l
  • Recommended contact time: 2.5 - 3.0 minutes
  • Temp Limit (Stability): 80 °C
  • Temp Limit (Stability): 176 °F
  • pH Limits: 4.5 - 8.5 (Operating)