title: Bioremoval of diethylketone by the synergistic combination of microorganisms and clays: uptake, removal and kinetic studies.
abstract: The performance of two bacteria, Arthrobacter viscosus and Streptococcus equisimilis, and the effect of the interaction of these bacteria with four different clays on the retention of diethylketone were investigated in batch experiments. The uptake, the removal percentages and the kinetics of the processes were determined. S. equisimilis, by itself, had the best performance in terms of removal percentage, for all the initial diethylketone concentrations tested: 200, 350 and 700 mg/L. The uptake values are similar for both bacteria. A possible mechanism to explain the removal of diethylketone includes its degradation by bacteria, followed by the adsorption of the intermediates/sub-products by the functional groups present on the cells' surfaces. The assays performed with bacteria and clays indicated that the uptake values are similar despite of the clay used, for the same microorganism and mass of clay, but in general, higher values are reached when S. equisimilis is used, compared to A. viscosus. Kinetic data were described by pseudo-first- and pseudo-second-order models.
authors: IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal. cquintelas@deb.uminho.pt
authors: Cristina
authors: C
authors: Quintelas
authors: Filomena
authors: F
authors: Costa
authors: Teresa
authors: T
authors: Tavares
mesh_terms: D000042:Absorption; D000538:Aluminum Silicates / Q000378:metabolism*; D001173:Arthrobacter / Q000378:metabolism*; D001546:Bentonite / Q000378:metabolism; D001673:Biodegradation, Environmental; D000077215:Clay; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007616:Kaolin / Q000378:metabolism; D017633:Magnesium Silicates / Q000378:metabolism; D010422:Pentanones / Q000032:analysis / Q000378:metabolism*; D013291:Streptococcus / Q000378:metabolism*; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D000538:Aluminum Silicates; D001546:Bentonite; D000077215:Clay; D007616:Kaolin; D017633:Magnesium Silicates; D010422:Pentanones; D062065:Wastewater; D014874:Water Pollutants, Chemical; C003760:vermiculite; C027452:diethyl ketone; C001671:magnesium trisilicate