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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Table 3.7. Biosorption data of Pb 2+ , Cd 2+ ,and Ni 2+ by both immobilized with Na-silicate<br />
and free algae (10.0 mL solution of 250.0 mg/L metal ion concentration,<br />
soltion pH of 6.0, sorption time as 60 min)<br />
Sorption (%)<br />
Biosorbents Pb Cd Ni<br />
Na-silicate 100.0 ± 0.0 33.0 ± 2.0 41.0 ± 2.0<br />
Oocystis sp. 67.6 ± 3.4 29.2 ± 1.7 21.7 ± 3.5<br />
Na-silicate+Oocystis sp. 97.0 ± 3.0 47.0 ± 0.0 43.0 ± 3.0<br />
Scenedesmus protuberans 72.3 ± 1.4 31.3 ± 2.8 15.3 ± 2.8<br />
Na-silicate+Scenedesmus protuberans 98.0 ± 1.0 45.0 ± 1.0 41.0 ± 2.0<br />
3.6.2. Immobilization of Oocystis sp. and Scenedesmus protuberans into<br />
Agarose<br />
In Table 3.8., the results correspond to the sorption of Pb 2+ , Cd 2+ , and Ni 2+ by<br />
both agarose immobilized and free algae. The immobilized Oocystis sp. into agarose<br />
appears to not change the sorption ability of Oocystis sp. towards Pb 2+ and Ni 2+ ions so<br />
much. However, in the case of Cd 2+ , the sorption by Oocystis sp seems to be affected,<br />
and the immobilization has a rising effect on the sorption of Cd 2+ by Oocystis sp.. It has<br />
been indicated that agarose immobilized Scenedesmus protuberans shows no change in<br />
the sorption of Pb 2+ and Cd 2+ ions. It can be seen that, from Table 3.8, Ni 2+ sorption was<br />
not altered so much by the agarose immobilization of Scenedesmus protuberans.<br />
Table 3.8. Biosorption data of Pb 2+ , Cd 2+ ,and Ni 2+ by both immobilized with agarose<br />
and free algae (10.0 mL solution of 250.0 mg/L metal ion concentration,<br />
solution pH of 6.0, sorption time as 60 min)<br />
Sorption (%)<br />
Biosorbents Pb Cd Ni<br />
Agarose 57.0 ± 3.0 26.0 ± 1.0 27.0 ± 0.0<br />
Oocystis sp. 67.6 ± 3.4 29.2 ± 1.7 21.7 ± 3.5<br />
Agarose + Oocystis sp. 62.0 ± 5.0 46.0 ± 2.0 27.0 ± 2.0<br />
Scenedesmus protuberans 72.3 ± 1.4 31.3 ± 2.8 15.3 ± 2.8<br />
Agarose + Scenedesmus protuberans 72.0 ± 4.0 28.0 ± 3.0 28.0 ± 1.0<br />
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