Comparative Study of Sc(III) Sorption onto Carbon-based Materials

Quaternization of algal/PEI beads (a new sorbent): Characterization and application to scandium sorption from aqueous solutions

“…Different types of sorbents have been reported for the sorption of scandium from dilute solutions, including (a) biosorbents such as yeast [17], bacteria [18] or algae [19], carbon-based materials [20], resins [21][22][23][24]; impregnated resins [25][26][27]. Recently a new generation of materials has been designed using the interactions of alginate and polyethyleneimine (PEI) for manufacturing bead sorbents [28].…”

Kinetics of scandium ion sorption onto oxidized carbon nanotubes

“…Sorption behavior of Sc(III) onto oxidized carbon nanotubes was investigated at pH 3 as at pH > 4 its removal could be mostly by precipitation [9,17]. It is the advantage in the view of application of CNTs-COOH for the separation of Sc(III) from heavy metal ions as they exhibit very low affinity for carbon nanotubes under these conditions [1][2][3].…”

“…The comparative study of Sc(III) sorption showed that its affinity under acidic conditions was increasing in the order: oxidized activated carbon < Chelex 100 < graphene oxide < CNTs-COOH [17]. Both applied nanosized carbon materials showed superiority over the routinely used chelating resin Chelex-100.…”

“…The chelating resins containing iminodiacetate functional groups exhibit also affinity for alkali and alkaline earth elements, thus the additional washing step with the excess of buffer is required to remove the matrix components [15]. Carbon-based sorbents [16][17][18] have also been proposed for the enrichment of scandium.…”

Adsorption of Scandium and Neodymium on Biochar Derived after Low-Temperature Pyrolysis of Sawdust

“…It has been mentioned in a recent study, investigating sorption of Sc(III) onto carbon-based materials in acidic solutions, that competition between hydrogen and metal ions for the same sites may reduce sorption efficiency. Increase of pH charges the carbon surface more negatively, enhances electrostatic interactions between Sc and the sorbents and results in higher metal retention [78]. Finally, in a study investigating the adsorption of Eu 3+ on Fe 3 O 4 @cyclodextrin magnetic composite at low pH, it was mentioned that at higher pH, precipitation of REE may also take place [79].…”