Ion Exchange Process In Water Treatment

Ion exchanger in water treatment process the ion exchanger regeneration procedure involves three steps 1 the softener is taken out of service and a swift flow of water is passed upward through the zeolite bed.

Ion exchange process in water treatment. Ion exchange is a water treatment method where one or more undesirable ionic contaminants are removed from water by exchange with another non objectionable or less objectionable ionic substance. In the ion exchange process sodium ions are used to coat an exchange medium in the softener. Although different water treatment products utilize this process in different ways the action itself remains the same. But what exactly is it.

All anions are replaced by hydroxide oh ions. Ion exchange ix systems are used across a variety of industries for water softening purification and separation purposes. Water softeners usually use sodium na as the exchange ion. At the end of the exchange process the resin beads have loaded all cations and anions from the water and released h and oh ions.

Unwanted ions that are dissolved in the water are replaced with new beneficial or harmless ions of an equivalent charge. Sodium ions are supplied from dissolved sodium chloride salt also called brine. Ion exchange is a process used extensively in nuclear facilities industrial processes and medical and pharmaceutical operations to control the purity and ph of water by removing undesirable ions and replacing them with acceptable ones. While the chemistry of individual ion exchange reactions varies from one application to the next ix is a treatment process where dissolved ions are replaced by other more desirable ions of a similar electrical charge.

This is accomplished by exchanging calcium ca 2 and magnesium mg 2 cations against na or h cations see water softening. Both the contaminant and the exchanged substance must be dissolved and have the same type of electrical charge positive or negative. In the first section of the present chapter the kinetics and thermodynamics of ion exchange are presented. The exchange medium can be natural zeolites or synthetic resin beads that resemble wet sand.

Ion exchange is a method widely used in household laundry detergents and water filters to produce soft water. The process of ion exchange is one of the most utilized techniques in water and wastewater treatment as well as in separation processes as chemical synthesis medical research food processing mining agriculture etc.