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

Figure 3.16. Effect of biosorbent amount on biosorption of Pb 2+ , Cd 2+ , and Ni 2+
by Porphyridium cruentum .................................................................47
Figure 3.17. Effect of biosorbent amount on biosorption of Pb 2+ , Cd 2+ , and Ni 2+
by Scenedesmus protuberans...............................................................48
Figure 3.18. Desorption of Pb 2+ , Cd 2+ , and Ni 2+ from Oocystis sp. ...........................49
Figure 3.19. Desorption of Pb 2+ , Cd 2+ , and Ni 2+ from Scenedesmus protuberans .....50
Figure 3.20. Repetitive biosorption of Pb 2+ , Cd 2+ , and Ni 2+ by Dunaliella salina .....53
Figure 3.21. Repetitive biosorption of Pb 2+ , Cd 2+ , and Ni 2+ by Oocystis sp. .............53
Figure 3.22. Repetitive biosorption of Pb 2+ , Cd 2+ , and Ni 2+ by Porphyridium
cruentum .............................................................................................54
Figure 3.23. Repetitive biosorption of Pb 2+ , Cd 2+ , and Ni 2+ by Scenedesmus
protuberans.........................................................................................54
Figure 3.24. Repetitive biosorption of Cd 2+ by Porphyridium cruentum
(for 10 successive loadings).................................................................55
Figure 3.25. Repetitive biosorption of Ni 2+ by Porphyridium cruentum
(for 10 successive loadings) .................................................................55
Figure 3.26. SEM images of Na-silicate immobilized biosorbents ...........................56
Figure 3.27. Langmuir isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Dunaliella salina............................................................................59
Figure 3.28. Langmuir isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Oocystis sp. ....................................................................................60
Figure 3.29. Langmuir isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Porphyridium cruentum..................................................................61
Figure 3.30. Langmuir isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Scenedesmus protuberans...............................................................62
Figure 3.31. Freundlich isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Dunaliella salina............................................................................63
Figure 3.32. Freundlich isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Oocystis sp. ....................................................................................64
Figure 3.33. Freundlich isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Porphyridium cruentum..................................................................65
Figure 3.34. Freundlich isotherm plot for Pb 2+ , Cd 2+ , and Ni 2+ ions biosorbed
by Scenedesmus protuberans...............................................................66
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