Ion exchange is the process of removing ionic compounds from a water or solvent stream by employing the greater affinity that a particular ion has for the resin than to remain in solution. The result is “capture” of the ion on the resin. When the capacity of the ion exchange resin to hold a particular ion is reached, the resin is “exhausted.” Some designs call for single-use resin; others for the resin to be regenerated. The ion exchange regeneration process involves passing a regenerant solution over the resin to remove the contaminant ions leaving the resin in a form ready for reuse. The regeneration process can involve a salt or an acid or base.
Ion exchange is a proven, well known technology that has been used commercially in a wide variety of applications. It is primarily used to remove dissolved solids, alkalinity, metals, other cations and anions. Ion exchange has been designated as a “Best Available Technology” by the EPA for the removal of arsenic from drinking water sources.
Use ion exchange systems for the removal of soluble ions such as nitrate, arsenic, organics, minerals (deionization), chloride, sulfate, sodium and other alkaline earth metals, nickel, copper, zinc and other base and heavy metals.
Specific applications we can address include:
- Catalyst Recovery
- Closed Loop Cooling Systems
- DI High Purity Water
- Process Water
- Oxyanion Treatment (Nitrates, Arsenate, Chromate)
- Organics removal
- Boiler Make-up Water
- Ground Water Remediation
- Certain metal machining operations e.g. EDM
- Water softening
Further Reading on Ion Exchange