: The recovering of trivalent Lanthanides from aqueous solutions, by biosorption process onto Galdieria sulphuraria lifeless cells, was investigated. Potentiometry, UV-Vis, FTIR-ATR spectroscopy and SEM-EDS analysis were used. All the experiments were performed at 25 °C, in 0.5 M NaCl. Ln3+ biosorption is greater in the 5-6 pH range with values ranging from 80 μmol/g to 130 μmol/g (dry weight). The adsorbed Ln3+ ions can be recovered at higher acidity (pH < 1) and the biosorbent can be reused. Specific molecular interactions between Ln3+ ions and the functional groups on G. sulphuraria surface were highlighted. Particularly, proteins are involved if Ln3+ = Pr3+, Sm3+, Eu3+, Tb3+, Dy3+, Tm3+, while Ce3+, Ho3+, Er3+ form bonds with carbohydrates. Finally, both protein and carbohydrate are involved if Gd3+ and Yb3+. A Surface Complexation approach, with a good graphical fitting to potentiometric experimental collected data, was used to describe the biosorption mechanism. This study could be of great applicative utility for removing of trivalent actinides, from waste aqueous solutions, by biosorption. As well known the lanthanides were used. as model to simulate the chemical behaviour of actinides in the same oxidation state.

Selective biosorption of lanthanides onto Galdieria sulphuraria / Manfredi, C; Amoruso, A J; Ciniglia, C; Iovinella, M; Palmieri, M; Lubritto, C; El Hassanin, A; Davis, S J; Trifuoggi, M. - In: CHEMOSPHERE. - ISSN 0045-6535. - 317:(2023), p. 137818. [10.1016/j.chemosphere.2023.137818]

Selective biosorption of lanthanides onto Galdieria sulphuraria

Manfredi, C
;
Amoruso, A J;El Hassanin, A;Trifuoggi, M
2023

Abstract

: The recovering of trivalent Lanthanides from aqueous solutions, by biosorption process onto Galdieria sulphuraria lifeless cells, was investigated. Potentiometry, UV-Vis, FTIR-ATR spectroscopy and SEM-EDS analysis were used. All the experiments were performed at 25 °C, in 0.5 M NaCl. Ln3+ biosorption is greater in the 5-6 pH range with values ranging from 80 μmol/g to 130 μmol/g (dry weight). The adsorbed Ln3+ ions can be recovered at higher acidity (pH < 1) and the biosorbent can be reused. Specific molecular interactions between Ln3+ ions and the functional groups on G. sulphuraria surface were highlighted. Particularly, proteins are involved if Ln3+ = Pr3+, Sm3+, Eu3+, Tb3+, Dy3+, Tm3+, while Ce3+, Ho3+, Er3+ form bonds with carbohydrates. Finally, both protein and carbohydrate are involved if Gd3+ and Yb3+. A Surface Complexation approach, with a good graphical fitting to potentiometric experimental collected data, was used to describe the biosorption mechanism. This study could be of great applicative utility for removing of trivalent actinides, from waste aqueous solutions, by biosorption. As well known the lanthanides were used. as model to simulate the chemical behaviour of actinides in the same oxidation state.
2023
Selective biosorption of lanthanides onto Galdieria sulphuraria / Manfredi, C; Amoruso, A J; Ciniglia, C; Iovinella, M; Palmieri, M; Lubritto, C; El Hassanin, A; Davis, S J; Trifuoggi, M. - In: CHEMOSPHERE. - ISSN 0045-6535. - 317:(2023), p. 137818. [10.1016/j.chemosphere.2023.137818]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/909172
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