Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Isolation and quantification of cadmium removal mechanisms in batch reactors inoculated by sulphate reducing bacteria: Biosorption versus bioprecipitation |
| Abstract | Biosorbing properties of sulphate reducing bacteria were tested to distinguish the amount of cadmium removed by bioprecipitation from that bound onto biomass surface (biosorption). Experimental results of cadmium abatement in batch growth tests (bioprecipitation tests) were then compared with metabolism-independent binding properties of SRB cell wall surface (biosorption tests performed with dead biomass). Experimental results showed that SRB inoculum removed 59 ± 5% of sulphates in 21 days even in presence of cadmium (0-36 mmol L-1), while non-monotonous kinetic effects were observed for increasing Cd concentrations. Comparison between bioprecipitation and biosorption tests denoted a significant contribution of biosorption (77%) in total Cd removal (0.40 ± 0.01 mmol g-1). Characterisation of bacterial acid-base surface properties by potentiometric titrations and mechanistic modelling denoted that carboxylic, phosphate and amino groups of cell wall are the main responsible of metal removal by biosorption mechanism. |
| Source | Bioresource technology 101 (9), pp. 2981–2987 |
| Keywords | BioprecipitationBiosorptionCadmiumModellingSulphate reducing bacteria |
| Journal | Bioresource technology |
| Editor | Elsevier Applied Science,, Barking, Regno Unito |
| Year | 2010 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.biortech.2009.12.009 |
| Authors | Pagnanelli, Francesca; Cruz Viggi, Carolina; Toro, Luigi |
| Text | 378959 2010 10.1016/j.biortech.2009.12.009 Scopus 2 s2.0 74749100257 Bioprecipitation Biosorption Cadmium Modelling Sulphate reducing bacteria Isolation and quantification of cadmium removal mechanisms in batch reactors inoculated by sulphate reducing bacteria Biosorption versus bioprecipitation Pagnanelli, Francesca; Cruz Viggi, Carolina; Toro, Luigi Universita degli Studi di Roma La Sapienza Biosorbing properties of sulphate reducing bacteria were tested to distinguish the amount of cadmium removed by bioprecipitation from that bound onto biomass surface biosorption . Experimental results of cadmium abatement in batch growth tests bioprecipitation tests were then compared with metabolism independent binding properties of SRB cell wall surface biosorption tests performed with dead biomass . Experimental results showed that SRB inoculum removed 59 ± 5% of sulphates in 21 days even in presence of cadmium 0 36 mmol L 1 , while non monotonous kinetic effects were observed for increasing Cd concentrations. Comparison between bioprecipitation and biosorption tests denoted a significant contribution of biosorption 77% in total Cd removal 0.40 ± 0.01 mmol g 1 . Characterisation of bacterial acid base surface properties by potentiometric titrations and mechanistic modelling denoted that carboxylic, phosphate and amino groups of cell wall are the main responsible of metal removal by biosorption mechanism. 101 Published version http //www.scopus.com/record/display.url eid=2 s2.0 74749100257 origin=inward Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. carolina.cruzviggi CRUZ VIGGI CAROLINA |