Ion exchange replaces (or exchanges) unwanted minerals in water with less objectionable ones. Chloride and hydroxide ions are the most commonly used materials on the resin beads. As water passes through the device, the resin adsorbs anions such as sulfate, nitrate, arsenic and bicarbonates and releases chloride into the water. The exchange occurs in a fiberglass tank or plastic-lined steel tank filled with either the resin or a synthetic zeolite.
Capacity of an anion exchange unit
Before installing an anion exchange unit, consider the requirements of the treatment system. Nitrate and sulfate are odorless, colorless and non-staining, so only drinking and cooking water may require treatment. The amount of water an anion exchange device can treat depends on the contaminant being removed. If removing nitrate, the removal capacity will depend on both the nitrate and the sulfate concentration in the water, as anion exchange resins preferentially adsorb sulfate. The sulfate will bump nitrate from the resin and into the treated water when all the exchange sites are filled. The size of the unit needed and the time between regeneration also depend on daily water use and flow rate.
Maintenance of anion exchange units
When all chloride has been exchanged, the resin beads are said to be exhausted. They are regenerated with brine. The brine solution releases the adsorbed contaminants and replaces them with chloride. The released anions are washed out with the waste brine. Maintaining an anion exchange unit also includes stocking the salt supply. Anion exchange treats water contaminants that can have negative health effects. It is crucial to monitor the treated water for these contaminants to verify that the unit is working properly. Home test kits are available to estimate nitrate and sulfate concentrations. If testing shows that contaminant concentrations exceed an acceptable level, regenerate the unit.
Lanlang ® TA213D
Macroporous type I strong anion exchange resin
Used for water demineralization, organic scavenger, sugar decolorization.
Lanlang ® TA213D Is a premium grade macroporous type I strong anion exchange resin with polyacrylic matrix and quaternary amine (Trimethylamine) function group in standard Gaussian size distribution. Its macroporous structure makes it can adsorb soluble organic molecules and provides good performance to resist to osmotic & mechanical shock and oxidation. The acrylic structure makes TA213D has excellent desorption of organics during regeneration. TA213D is used in multi bed demineralization to prevent resins from organic fouling. It (or combining with TA201D) also could be used for sugar decolorization.
Complete data sheet feel free contact us!