Water and Wastewater: Ion Exchange Application

Authored by: Sven Erik Jørgensen

Encyclopedia of Environmental Management

Print publication date:  December  2012
Online publication date:  December  2012

Print ISBN: 9781439829271
eBook ISBN: 9781351235860
Adobe ISBN:

10.1081/E-EEM-120048394

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Abstract

The basic knowledge about the ion exchange process is presented in the first section: 1) the mass equation is valid; 2) we distinguish between cation and anion exchangers and between strong, medium, and weak acidic and alkaline ion exchanger; 3) the capacity of the ion exchanger is expressed either as eqv/L or as the number of bed volumes that can be tratee before saturation; 4) the selectivity coefficient is defined, and its applicability is shown; and 5) possibilities of regeneration and recovery of the removed ions. The second section gives a short overview of the application of the ion exchange process for treatment of water and wastewater: for removal of calcium, nitrate, ammonium, and metal ions in general, and particularly, heavy metal ions, including silver, mercury, and proteins.

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