Metal biosorption-flotation. Application to cadmium removal.
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. Zeta-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%.
Matis
K A
KA
Laboratory of General and Inorganic Chemical Toxicology, Department of Chemistry, Aristotle University, Thessaloniki, Greece.
Zouboulis
A I
AI
Grigoriadou
A A
AA
Lazaridis
N K
NK
Ekateriniadou
L V
LV
D000327:Adsorption; D018533:Biomass; D002104:Cadmium / Q000302:isolation & purification*; D007692:Diatomaceous Earth; D004785:Environmental Pollutants / Q000302:isolation & purification*; D005374:Filtration; D006112:Gravitation; D007218:Industrial Microbiology / Q000379:methods*; D007220:Industrial Waste; D012037:Refuse Disposal / Q000379:methods*; D012996:Solutions; D013302:Streptomyces / Q000302:isolation & purification; D013535:Suspensions; D014867:Water
D004785:Environmental Pollutants; D007220:Industrial Waste; D012996:Solutions; D013535:Suspensions; D002104:Cadmium; D014867:Water; D007692:Diatomaceous Earth