Ion exchange - Principles of Chemical Separations with Environmental Applications - page 228

E

D

E

E

D

C

J

E

I

D

K

B

G

A

H

F

K

K

Figure 8.8 Asahi moving packed bed. A, adsorption section; B, elution section;
C, fluidized resin backwash; D, resin collection hoppers with screen top and
non-return valve outlet for resin; E, transfer and backwash water overflow;
F, feed; G, barren effluent; H, eluant; I, eluate product; J, backwash supply;
K, resin flow [1]. Copyright 1987 John Wiley & Sons, Inc. This material is used
by permission of John Wiley & Sons, Inc.

When a pilot column is to be used to determine the breakthrough data, it is important to
remember that it should be operated at the same flowrate as the full-size column in terms
of bed volumes per hour.

Example 8.1: ion exchange in waste treatment

Problem:
An industrial wastewater with 100 mg LofCu 2 + (3.2 meq

L) is to be treated by
an ion-exchange column. The allowable effluent concentration, C a ,is5%of C 0 .A
breakthrough curve has been obtained from an experimental laboratory column on the
sodium cycle. Data concerning the column are: mass of resin

/ /

= 41.50 g on a moist