Uptake of Europium(III) from Water using Magnetite Nanoparticles
authors Carvalho, RS; Daniel-da-Silva, AL; Trindade, T
nationality International
journal PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
keywords IRON-OXIDE NANOPARTICLES; RARE-EARTH IONS; AQUEOUS-SOLUTION; ADSORPTION BEHAVIOR; CARBON NANOTUBES; WASTE-WATER; DYE REMOVAL; EU(III); SORPTION; SEPARATION
abstract It is demonstrated that colloidal magnetite nanoparticles can be used as nanosorbents for lanthanide ions dissolved in water. In particular, a series of experiments are performed for the removal of Eu(III) in distinct analytical conditions and by applying an external magnet to collect the sorbents previously dispersed in water samples. Furthermore, strategies for surface chemistry functionalization are also investigated, aiming to investigate the effect of this parameter on the removal capacity of the Fe3O4 nanoparticles. The supernatant solutions are monitored for the remaining amount of Eu(III) by fluorescence emission measurements in the presence of 2,6-pyridinedicarboxylic acid as a sensitizer. The results demonstrate that neat Fe3O4 nanoparticles are capable of capturing lanthanide ions (III) from aqueous solutions (pH 7), without need of surface modification, and for subsequent removal by magnetic separation. During the removal, efficiency is increased after modifying the particles' surfaces with silica and 3-aminopropyltrimethoxysilane; in alkaline medium (pH 10), there is complete removal regardless the type of nanosorbent used. This has been explained by the formation of insoluble Eu(III) species that adsorb strongly to the nanosorbents surfaces allowing their subsequent magnetic separation.
publisher WILEY-V C H VERLAG GMBH
issn 0934-0866
year published 2016
volume 33
issue 3
beginning page 150
ending page 157
digital object identifier (doi) 10.1002/ppsc.201500170
web of science category Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000372956600004
  ciceco authors
  impact metrics
times cited (wos core): 4
journal impact factor (jcr 2016): 4.474
5 year journal impact factor (jcr 2016): 3.776
category normalized journal impact factor percentile (jcr 2016): 77.333
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