BIOSORPTION OF Pb2+, Cd2+, & Ni2+ FROM WATERS BY ...

Sorption (%)
100.00
80.00
60.00
40.00
20.00
0.00
-20.00
1 2 3 4 5 6 7 8 9 10
successive loadings
10 ppm Cd
100 ppm Cd
Figure 3.24. Percent biosorption of Cd 2+ by Porphyridium cruentum (10.0 mL solution
of 10.0-100.0 mg/L metal ion concentrations, solution pH of 6.0, sorption
time of 30 min., and 10 successive loadings)
Sorption (%)
100.00
80.00
60.00
40.00
20.00
0.00
-20.00
1 2 3 4 5 6 7 8 9 10
successive loadings
10 ppm Ni
100 ppm Ni
Figure 3.25. Percent biosorption of Ni 2+ by Porphyridium cruentum (10.0 mL solution
of 10.0-100.0 mg/L metal ion concentrations, solution pH of 6.0, sorption
time of 30 min., and 10 successive loadings)
3.6. Immobilization Studies
Biosorption studies were carried on with immobilized algae, Oocystis sp. and
Scenedesmus protuberans into Na-silicate and agarose.
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