Abirhire, Oghenemise , Dr.(Mrs). Kadiri, Medina. O .
Bioaccumulation of heavy metals in micro algae.
A study was carried out on the bioaccumulation of zinc, iron, copper, cadmium and aluminum by Chlorella vulgaris, Phacus curvicauda, Euglena acus and Oscillatoria bornettia for four weeks in the laboratory. On the basis of uptake rate, the algae could be separated into four groups. Those with long continuous uptake of heavy metals at the beginning of the experiment were Phacus curvicauda (Zn and Al), Chlorella vulgaris (Fe and Cd), Euglena acus (Zn, Fe and Cu) and Oscillatoria bornettia (Zn and Al). Short time uptake towards the end of the experiment occurred in Phacus curvicauda (Zn, Al and Fe), Chlorella vulgaris (Cd), Euglena acus (Zn, Fe and Cu) and Oscillatoria bornettia (Zn and Al). Algae with long continuous uptake throughout the experiment were Phacus curvicauda (Fe, Cu and Cd), Chlorella vulgaris (Zn, Cu and Al), Euglena acus (Cd) and Oscillatoria bornettia (Fe, Cu and Cd). Others with short time uptake at the first two weeks of the experiment include Chlorella vulgaris (Cu and Al). A “mean metal concentration factor” was used to quantify the absorption capacity of the algae. Oscillatoria bornettia had the highest absorption for Zn (0.3056), Fe (0.3016), Cu (0.0917) and Cd (0.2761) while Phacus curvicauda and Euglena acus had the same absorption capacity (0.5663) for Al
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1 - University of Benin, Botany, University of Benin, PMB 1154 Ugbowo, Benin city, Edo state, 234, Nigeria
Presentation Type: Oral Paper:Papers for Sections
Date: Monday, July 28th, 2008
Time: 10:00 AM