Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Olive husk: an alternative sorbent for removing heavy metal from aqueous streams |
| Abstract | Sorption properties of olive husk were investigated under equilibrium (batch tests) and dynamic (column tests) conditions in order to assess the possibility of using such a waste material for removing heavy metals from aqueous streams. Husk samples were contacted, at 25°C, with aqueous solutions of nitric salts of Pb, Cd, Cu, and Zn. Sorption isotherms obtained from equilibrium data were fitted and interpreted by the Freundlich model. Metals-saturated husk samples resulting from column tests were air-dried and incinerated to simulate combustion in order to assess the fate of sorbed metals. The results demonstrated that, under both equilibrium and dynamic conditions, metal sorption capacity of the husk was in the sequence Pb>Cd>Cu>Zn. For all the metals, calculated Freundlich constants decreased by increasing initial metal concentration or decreasing solution pH. In dynamic tests, a significant reduction of sorption capacity was recorded (except for copper) when a metal was fed simultaneously to the others: Pb (77%); Cd (93%); Zn (68%). Combustion tests carried out on metals-saturated husk samples showed that the average losses of lead and cadmium, as volatile species, were always three to four times greater than the losses of copper and zinc, in both single-metal- and multimetal-saturated samples |
| Source | Applied biochemistry and biotechnology 110(3, pp. 137–149 |
| Keywords | Heavy metalssorptionolive huskwastewater |
| Journal | Applied biochemistry and biotechnology |
| Editor | Humana Press,, Clifton, N.J., Stati Uniti d'America |
| Year | 2003 |
| Type | Articolo in rivista |
| Authors | Volpe, A.(1), Lopez A.(2), Pagano M.(3) |
| Text | 42073 2003 Heavy metals sorption olive husk wastewater Olive husk an alternative sorbent for removing heavy metal from aqueous streams Volpe, A. 1 , Lopez A. 2 , Pagano M. 3 1,2,3 CNR Ist. di ricerca sulle Acque Sorption properties of olive husk were investigated under equilibrium batch tests and dynamic column tests conditions in order to assess the possibility of using such a waste material for removing heavy metals from aqueous streams. Husk samples were contacted, at 25°C, with aqueous solutions of nitric salts of Pb, Cd, Cu, and Zn. Sorption isotherms obtained from equilibrium data were fitted and interpreted by the Freundlich model. Metals saturated husk samples resulting from column tests were air dried and incinerated to simulate combustion in order to assess the fate of sorbed metals. The results demonstrated that, under both equilibrium and dynamic conditions, metal sorption capacity of the husk was in the sequence Pb>Cd>Cu>Zn. For all the metals, calculated Freundlich constants decreased by increasing initial metal concentration or decreasing solution pH. In dynamic tests, a significant reduction of sorption capacity was recorded except for copper when a metal was fed simultaneously to the others Pb 77% ; Cd 93% ; Zn 68% . Combustion tests carried out on metals saturated husk samples showed that the average losses of lead and cadmium, as volatile species, were always three to four times greater than the losses of copper and zinc, in both single metal and multimetal saturated samples 110 3 Olive husk an alternative sorbent for removing heavy metal from aqueous streams 61.pdf Articolo in rivista Humana Press, 0273 2289 Applied biochemistry and biotechnology Applied biochemistry and biotechnology Appl. biochem. biotechnol. Applied biochemistry and biotechnology. Applied biochemistry and biotechnology. Part A, Enyzme engineering and biotechnology Enzyme engineering and biotechnology angela.volpe VOLPE ANGELA antonio.lopez LOPEZ ANTONIO michele.pagano PAGANO MICHELE |