BIOSORPTION OF Pb2+, Cd2+, & Ni2+ FROM WATERS BY ...
BIOSORPTION OF Pb2+, Cd2+, & Ni2+ FROM WATERS BY ...
BIOSORPTION OF Pb2+, Cd2+, & Ni2+ FROM WATERS BY ...
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3.6.1. Immobilization of Oocystis sp. and Scenedesmus protuberans into<br />
Sodium-Silicate.<br />
In this study, Oocystis sp. and Scenedesmus protuberans were immobilized into<br />
sodium-silicate matrix. The SEM images (Figure 3.26) of Na-silicate immobilized<br />
Oocystis sp. Scenedesmus protuberans. It can be observed that the algal cells were fixed<br />
to Na-silicate matrix. From Table 3.7,The results demonstrates that the immobilization<br />
of the Oocystis sp. and Scenedesmus protuberans into sodium silicate appears to<br />
increase the biosorption of Pb 2+ in great manner in comparison to that of Cd 2+ ,and Ni 2+<br />
(In Table 3.7., the results of the sorption of Pb 2+ , Cd 2+ , and Ni 2+ by both Na-silicate<br />
immobilized and free algae).<br />
(a)<br />
(c)<br />
Figure 3.26. SEM images of Na-silicate immobilized biosorbent: (a) Oocystis sp.,<br />
(b) Scenedesmus protuberans, and SEM image of (c) blank Na-silicate<br />
(b)<br />
56