Application of modified multiwalled carbon nanotubes as a sorbent for separation and preconcentration trace amounts of Pd(II)

In this study, a solid phase extraction procedure is proposed for separation and preconcentration trace amounts of Pd(II) in aqueous medium by using a column of multiwalled carbon nanotubes (MWCNTs) modified with N,N`-bis (2-hydroxybenzylidene)-2,2`(aminophenylthio) ethane reagent. An implementation, it was found that the sorption is quantitative in the pH range (1.5-4), whereas quantitative desorption occurs instantaneously with 3.0 mL of 0.3 mol L-1 Na2SO3. Various parameters such as the effect of pH, flow rate, type and amount of eluent, breakthrough volume and interference of a large number of ions on the recovery of the palladium ions was studied. The method was successfully applied for separation and determination of palladium ions in water samples.

Keywords:

Multiwalled carbon nanotubes , Preconcentration , palladium determination