One of the more common water treatment methods is the use of demineralizers and ion exchange. This method will be discussed in this chapter.

EO 1.2DEFINE the following terms:

a. Ion exchange e. Polymer

b. Demineralize f. Mixed-bed demineralizer

c. Cation g. Affinity

d. Anion h. Decontamination factor

EO 1.3DESCRIBE the following:

a. Resin bead

b. Cation resin

c. Anion resin

EO 1.4DISCUSS the following factors of ion exchange:

a. Relative affinity

b. Decontamination factor

EO 1.5WRITE the reaction for removal of NaCl and CaS0₄ by a mixed-bed ion exchanger such as one containing HOH resin.