Research Article
Removal of Hardness of Earth Alkaline Metals from Aqueous Solutions by Ion Exchange Method
Table 4
Experimental conditions depend on effect of pH for removal of hardness of calcium and magnesium.
| | pH | Stirring speed
(rpm) | Resin dosage
(g) | Initial hardness of
calcium (FH) | Hardness of calcium in
equilibrium (FH) | Initial hardness of
magnesium (FH) | Hardness of magnesium in
equilibrium (FH) |
| | 2 | 115 | 5 | 79.12 | 36.7
(60 min) | 124.89 | 99.83
(60 min) | | 3 | 115 | 5 | 83.75 | 0.00
(60 min) | 124.89 | 96.80
(60 min) | | 4 | 115 | 5 | 83.75 | 0.00
(60 min) | 118.28 | 100.77
(60 min) | | 5 | 115 | 5 | 85.25 | 0.00
(60 min) | 102.90 | 90.50
(60 min) |
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