Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Development of new composite biosorbents from olive pomace wastes |
| Abstract | In this study olive pomace was used as a source of binding substances for the development of composite biosorbents to be used in heavy metal removal from aqueous solutions. The aim was to obtain biosorbent material with an increased concentration of binding sites. The effects of two different extraction procedures (one using only methanol and the other one hexane followed by methanol) on the binding properties of olive pomace were tested by potentiometric titrations and batch biosorption tests for copper and cadmium removal. Titration modelling evidenced that both kinds of extractions generated a solid with a reduced amount of protonatable sites. Biosorption tests were organized according to full factorial designs. Analysis of variance denoted that both kinds of extractions determined a statistically significant negative effect on metal biosorption. In the case of cadmium extractions also determined a significant decrease of selectivity with respect to olive pomace. When the acid-base and binding properties of the substances extracted were determined, they were adsorbed onto a synthetic resin (octadecylsilane) and calcium alginate beads. In this way two kinds of composite biosorbents have been obtained both having an increased concentration of binding substances with respect to native olive pomace, also working more efficiently in metal removal. © 2010 Elsevier B.V. All rights reserved. |
| Source | Applied surface science 256 (17), pp. 5492–5497 |
| Keywords | BiosorptionHeavy metalsModellingOlive pomacePotentiometric titration |
| Journal | Applied surface science |
| Editor | North-Holland, Amsterdam, Paesi Bassi |
| Year | 2010 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.apsusc.2009.12.146 |
| Authors | Pagnanelli, Francesca; Cruz Viggi, Carolina; Toro, Luigi |
| Text | 378955 2010 10.1016/j.apsusc.2009.12.146 Scopus 2 s2.0 77953130873 Biosorption Heavy metals Modelling Olive pomace Potentiometric titration Development of new composite biosorbents from olive pomace wastes Pagnanelli, Francesca; Cruz Viggi, Carolina; Toro, Luigi Universita degli Studi di Roma La Sapienza In this study olive pomace was used as a source of binding substances for the development of composite biosorbents to be used in heavy metal removal from aqueous solutions. The aim was to obtain biosorbent material with an increased concentration of binding sites. The effects of two different extraction procedures one using only methanol and the other one hexane followed by methanol on the binding properties of olive pomace were tested by potentiometric titrations and batch biosorption tests for copper and cadmium removal. Titration modelling evidenced that both kinds of extractions generated a solid with a reduced amount of protonatable sites. Biosorption tests were organized according to full factorial designs. Analysis of variance denoted that both kinds of extractions determined a statistically significant negative effect on metal biosorption. In the case of cadmium extractions also determined a significant decrease of selectivity with respect to olive pomace. When the acid base and binding properties of the substances extracted were determined, they were adsorbed onto a synthetic resin octadecylsilane and calcium alginate beads. In this way two kinds of composite biosorbents have been obtained both having an increased concentration of binding substances with respect to native olive pomace, also working more efficiently in metal removal. © 2010 Elsevier B.V. All rights reserved. 256 Published version http //www.scopus.com/record/display.url eid=2 s2.0 77953130873 origin=inward Articolo in rivista North Holland 0169 4332 Applied surface science Applied surface science Appl. surf. sci. Applied surface science. carolina.cruzviggi CRUZ VIGGI CAROLINA |