info:eu-repo/semantics/article
MicroPIXE analysis of removal of aqueous U(VI) by S. intermedia and P. stratiotes in the presence of Th(IV)
Fecha
2020-08Registro en:
de la Fourniere, Emanuel María; Vega, Nahuel Agustín; Müller, Nahuel Agustín; Debray, Mario Ernesto; MicroPIXE analysis of removal of aqueous U(VI) by S. intermedia and P. stratiotes in the presence of Th(IV); Elsevier; Beam Interactions with Materials and Atoms; 477; 8-2020; 87-90
0168-583X
CONICET Digital
CONICET
Autor
de la Fourniere, Emanuel María
Vega, Nahuel Agustín
Müller, Nahuel Agustín
Debray, Mario Ernesto
Resumen
In this work, Spirodela intermedia and Pistia stratiotes, autochthonous floating macrophytes, were used to remove aqueous UO22+ (1 and 10 mg.L−1) under laboratory conditions. The influence of Th4+(1 mg.L−1) was studied for the highest concentration of U(VI). All the parameters of the bioremediation process, bioconcentration factors (BCFs) in roots and leaves and translocation factors (TFs), were achieved by microPIXE quantification. This analysis was carried out using a 50-MeV 16O5+ beam with the aid of the heavy-ion microprobe at the TANDAR Laboratory in Buenos Aires. High resolution 2D maps of the in vivo elemental distribution in macrophytes for different conditions were obtained. Both plants have the ability to accumulate a large amount of U(VI) yielding BCFs > 500. Only S. intermedia can additionally uptake Th(IV) reaching a high BCF (>300 at 96 h) but the plant does not survive; Th was detected within the chlorenchyma ([Th] ≅ 30 µg.g−1).