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Multiwall carbon nanotubes (MWCNTs) have been pretreated with HNO 3  and used for the adsorption of radionuclide  152+154 Eu(III) from aqueous solutions. The effects of pH (2–12), ionic strength (0.01 M and 0.1 M NaClO 4 ) and radionuclide  152+154 Eu(III) solution concentrations (10 -8 –10 -5  mol/L) on the adsorption of  152+154 Eu(III) on MWCNTs were investigated. The experiments were carried out at 25±2 °C and under atmosphere conditions. Adsorption of  152+154 Eu(III) on MWCNTs increases significantly with increasing pH at pH &lt;6, and over 96%  152+154 Eu(III) are adsorbed on MWCNTs at pH &gt;6. Strong surface complexation and/or chemisorptions are considered as the main adsorption mechanism. The sorption was also characterized by using high resolution XPS spectra. The results show that MWCNTs can be a promising candidate of adsorbent for preconcentration of lanthanides from large volumes in radioactive nuclear waste management.

radiochimica acta

Adsorption and kinetic desorption study of  152+154 Eu(III) on multiwall carbon nanotubes from aqueous solution by using chelating resin and XPS methods