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"Characterization of U(VI) Sorption and Leaching on Clay Supported Biomass Sorbents"
Melisa Soledad Olivelli, Daniel Di Gregorio, Hugo Huck, Jorge Fernández Niello, Rosa María Torres Sánchez and Gustavo Curutchet
Proc. of the "20th International Biohydrometallurgy Symposium" (IBS 2013), Antofagasta, Chile, October 8-11, 2013. Ed. N. Guiliani, C. Demergasso, R. Quatrini, F. Remonsellez, C. Davis-Belmar, G. Levican, P. Parada, C. Barahona and R. Zale
Adv. Mat. Res. 825 (2013) 532-535
In previous studies was demonstrated that matrixes generated from fungal biomass and a montmorillonite (BMMTs) are efficient as biosorbentes in batch uranium removal systems. The objective of this article is to evaluate the U(VI) sorption capacity of BMMT in continuous systems for its removal from effluents and to determine the reusability of the sorbent and the recovery of the uranium testing different leaching solutions. Upflow BMMT columns were performed in order to optimize the system for continuous sorption techniques. For upflow columns, the maximum total amount of U(VI) retained was 75 mg U(VI) / g BMMT. Treatment of U(VI) loaded BMMTs with leaching solutions allowed calculating U(VI) extraction percentages. These results indicated the possibility of recycling the sorbent after processes of U(VI) sorption and that the use of clay supported biomass sorbents in upflow columns presented strong potential for uranium retention.
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