The use of Italian "Red Soil" as an alternative low-cost sorbent material has been investigated for heavy metal removal in multicomponent systems. Pb, Cu, Cd, and Ni adsorption was studied at fixed pH (6.0) and constant ionic strength (0.1 mol L-1 by NaNO3) by a flowthrough reactor setup performing monocomponent and binary adsorption tests and sequential extraction. The whole set of experimental data was represented by a competitive model based on the surface complexation concept. High Pb and Cu adsorption was largely due to a surface complexation mechanism, whereas lower Cd and Ni adsorption was due to cation-exchange reactions. Sequential extraction results independently substantiated the different adsorption behavior. Pb and Cu adsorption was not significantly affected by the presence of the other metals, whereas Cd and Ni strongly compete with each other and were displaced in the presence of Pb and Cu. "Red Soil" was effective in the removal of heavy metals from contaminated aqueous streams in competitive conditions if compared with other low-cost sorbents

Modeling the competitive adsorption of Pb, Cu, Cd and Ni onto a natural heterogeneous sorbent material (Italian “Red Soil”) / PETRANGELI PAPINI, Marco; Teresa, Saurini; Annalisa, Bianchi; Majone, Mauro; Beccari, Mario. - In: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. - ISSN 0888-5885. - STAMPA. - 43:17(2004), pp. 5032-5041. [10.1021/ie0341247]

Modeling the competitive adsorption of Pb, Cu, Cd and Ni onto a natural heterogeneous sorbent material (Italian “Red Soil”)

PETRANGELI PAPINI, Marco;MAJONE, Mauro;BECCARI, Mario
2004

Abstract

The use of Italian "Red Soil" as an alternative low-cost sorbent material has been investigated for heavy metal removal in multicomponent systems. Pb, Cu, Cd, and Ni adsorption was studied at fixed pH (6.0) and constant ionic strength (0.1 mol L-1 by NaNO3) by a flowthrough reactor setup performing monocomponent and binary adsorption tests and sequential extraction. The whole set of experimental data was represented by a competitive model based on the surface complexation concept. High Pb and Cu adsorption was largely due to a surface complexation mechanism, whereas lower Cd and Ni adsorption was due to cation-exchange reactions. Sequential extraction results independently substantiated the different adsorption behavior. Pb and Cu adsorption was not significantly affected by the presence of the other metals, whereas Cd and Ni strongly compete with each other and were displaced in the presence of Pb and Cu. "Red Soil" was effective in the removal of heavy metals from contaminated aqueous streams in competitive conditions if compared with other low-cost sorbents
2004
01 Pubblicazione su rivista::01a Articolo in rivista
Modeling the competitive adsorption of Pb, Cu, Cd and Ni onto a natural heterogeneous sorbent material (Italian “Red Soil”) / PETRANGELI PAPINI, Marco; Teresa, Saurini; Annalisa, Bianchi; Majone, Mauro; Beccari, Mario. - In: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH. - ISSN 0888-5885. - STAMPA. - 43:17(2004), pp. 5032-5041. [10.1021/ie0341247]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/239879
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