Metal biosorption-flotation. Application to cadmium removal |
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| Authors: | K A Matis A I Zouboulis A A Grigoriadou N K Lazaridis L V Ekateriniadou |
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| Institution: | (1) Laboratory of General and Inorganic Chemical Technology, Department of Chemistry, Aristotle University, GR-540 06 Thessaloniki, Greece;(2) Laboratory of Biochemistry, Department of Chemistry, Aristotle University, Thessaloniki, Greece |
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| Abstract: | Biosorption, using suspended non-living biomass, and flotation (for consequent solid/liquid separation of the metal-loaded biomass) have been studied in the laboratory as a possible combined process, for the removal of toxic metals (i.e. cadmium) from dilute aqueous solutions. The various parameters of the process were investigated in depth, including re-use of biosorbent. A filter aid (contained in the biomass industrial waste used) was found not really to interfere.  -potential measurements of the aforementioned system were also carried out. Promising results were obtained during continuous-flow experiments. A flotation residence time of 4 min was achieved. Metal removal and suspended biomass recovery were generally over 95%. |
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