Page 339 - Water and wastewater engineering

8-8 WATER AND WASTEWATER ENGINEERING

TABLE 8-1
a
Separation factors of ions for resins
b c
Strong acid cation resins Strong base anion resins
Cation, i i/Na Anion, i d
i/ Cl
Ra 2 13.0 UO CO3) 4 3200
2(
3
Ba 2 5.8 ClO e 150
4
2 2
Pb 5.0 CrO 100
4
2 2
Sr 4.8 SeO 17
4
2 2
Cu 2.6 SO 4 9.1
2 2
Ca 1.9 HAsO 4 4.5

Zn 2 1.8 HSO4 4.1
Fe 2 1.7 NO3 3.2

2
Mg 1.67 Br 2.3
2
K 1.67 SeO 1.3
3
2
Mn 1.6 HSO3 1.2

NH 1.3 NO2 1.1
4
Na 1.0 Cl 1.0

H 0.67 BrO3 0.9

HCO3 0.27

CH 3 COO 0.14

F 0.07
a
Above values are approximate separation factors for 0.005–0.010 N solution (TDS 250–
500 mg/L as CaCO 3 ).
b
SAC resin is polystyrene divinylbenzene matrix with sulfonate functional groups.
c
SBA resin is polystyrene divinylbenzene matrix with N (CH 3 ) 3 functional groups (i.e., a
Type 1 resin).
d
Separation factors are approximate and are based on various literature sources and on
experiments performed at the University of Houston.
e
ClO /Cl separation factor is for polystyrene SBA resins; on polyacrylic SBA resins, the
4
ClO 4 /Cl separation factor is approximately 5.0.
( Source: Clifford, 1999.)