title: Metal biosorption-flotation. Application to cadmium removal.
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. 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%.
authors.affiliation: Laboratory of General and Inorganic Chemical Toxicology, Department of Chemistry, Aristotle University, Thessaloniki, Greece.
authors.forename: K A
authors.initials: KA
authors.lastname: Matis
authors.forename: A I
authors.initials: AI
authors.lastname: Zouboulis
authors.forename: A A
authors.initials: AA
authors.lastname: Grigoriadou
authors.forename: N K
authors.initials: NK
authors.lastname: Lazaridis
authors.forename: L V
authors.initials: LV
authors.lastname: Ekateriniadou
mesh_terms: 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
chemical_list: D004785:Environmental Pollutants; D007220:Industrial Waste; D012996:Solutions; D013535:Suspensions; D002104:Cadmium; D014867:Water; D007692:Diatomaceous Earth