Ion Exchange In Drinking Water Treatment

Ion exchange is a water treatment process commonly used for water softening or demineralization but it also is used to remove other substances from the water in processes such as dealkalization deionization and disinfection.

Ion exchange in drinking water treatment.

Security s new ion exchange facility is based on a treatment system pioneered by widefield water and sanitation district that works at the atomic level to cleanse water. Ion exchange resins are made up of highly porous polymeric material that is acid base and water insoluble. But what exactly is it. Biological ion exchange biex has proved to remove natural organic matter nom better than biological activated carbon bac.

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. Ion exchange ix is a method of removing undesirable metallic salt ions from water by exchanging them with other ions attached to a media or resin. Both the contaminant and the exchanged substance must be dissolved and have the same type of electrical charge positive or negative. These resins are insensitive to ph in the range 6 5 to 9 0.

In many cases these substances cause no problem. Arsenic removal is accomplished by continuously passing water under pressure through one or more columns packed with strong base anion sba exchange resin. In drinking water treatment this technology is commonly used for softening and nitrate removal. The tiny beads that make up the resin are made from hydrocarbons.

This chemical process occurs because ions have differing affinities for the resin and these ions will replace ions with less attraction as they flow over the media. Ion exchange is also used for the removal of uranium. Ion exchange beads are used on smaller water supply systems to soften water by replacing calcium ions ca2 and magnesium ions mg2 ions with sodium ions na. Liquid disposal options may include direct discharge discharge to a sewer system discharge to a wastewater treatment plant or disposal to an underground injection control uic well.

There are two broad categories of ion exchange resins. Drinking water containing some salinity is much better for health than ultra pure water. In this process about 95 percent of the radium is also removed. The beads are usually reused rather than being.

Rohm and haas ion exchange ion exchange introduction 3 fd sep 2008 ion exchange impurities in water water as we have seen contains small amounts of foreign substances. Treatment residuals generated by ion exchange may include brine backwash rinse water and aged ineffective resins.