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.

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