Ion Exchange Medias
Ion-exchange resin is in the form of small (1–2 mm diameter) beads, usually white or yellowish, fabricated from an organic polymer. The material has a highly developed structure of pores on the surface of which are active sites. Ions (such as calcium) are held while other ions (sodium) are released; thus the process is called ion-exchange. There are many different types of ion-exchange resins which are fabricated to selectively prefer one or several different types of ions.
Water softening ion-exchange resins are used to replace the magnesium and calcium ions found in hard water . The resin can be regenerated by washing it with salt (NaCl). The calcium and magnesium ions migrate off the resin, being replaced by sodium ions from the solution until a new equilibrium is reached.
0804014146 Dowex softening resin
0802012899 Purolite C100E softening resin
0802013376 Purolite PFC100E softening resin
Mixed Bed Deionisation Resins
Mixed bed resins contain both cation and anion resins so most minerals are held within the resin and pure water is produced. Typically mixed bed resins can produce water of 1 to 5 uS/Cm while the purer versions can get to 0.5uS/cm.
0801040002 Lewatit NM60 mixed bed
0802041485 Purolite MB400 mixed bed resin
0802048842 Purolite NRW3240 purer mixed bed
Nirate Reduction Resin
Nitrate levels in many waters are often high. Over 60% of nitrate enters water from agricultural land. High concentrations of nitrate in water can cause methaemoglobinaemia in very young children).. The current regulatory standard is 50 mg/l nitrate is derived from the standard in the European Union's Drinking Water Directive.
0802021119 A520E Purolite nitrate resin
Anion & Cation Resins
0803012168 C100H cation resin
0802078856 C107 de alk resin
0900016960 A100 anion resin
0803012167 A200 anion resin
0802053379 A400 anion resin
0802058845 A500P anion resin
0802051144 A850 anion resin
0802058843 A860S anion resin