8.  Use of Di-(2-Ethylhexyl) Phosphoric Acid (DEHPA) Impregnated XAD-8 Copolymer Resin for the Separation of Metal Ions from Water

Authors: M. Ciopec, A. Negrea, C.M. Davidescu, P. Negrea, C. Muntean and A. Popa


Abstract:

In the present work, we tested the adsorption of metal ions on solvent impregnated resin (SIR). Di-(2- ethylhexyl)-phosphoric acid (DEHPA) has been chosen as an extractant for the purpose of this study. The Amberlite XAD8 resin was impregnated with DEHPA by dry impregnation method. Adsorption on the XAD8 support macro and interaction between the extractant and support has been emphasized by physicochemical methods of analysis (FTIR spectroscopy, EDAX and SEM). The experimental studies on adsorption of metal ions were carried out on Pb2+, Cu2+, Cd2+, Cr3+, Ni2+, Fe3+, Zn2+ and Ca2+. A separation method was developed for metals ions and was investigated the influence of contact time on the residual concentration of metal ions, on their removal efficiency and on the adsorption capacity of resin towards metal ions.


Keywords: Amberlite XAD8; DEHPA; Solvent impregnated resin (SIR); Metal Ions Removal

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