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E-Journal of Chemistry
Volume 5, Issue 2, Pages 291-301

Preparation and Analytical Properties of Amphoteric Chelating Resin

Bhavna A. Shah,1 Ajay V. Shah,1 and Pathik M. Shah2

1Department of Chemistry, Veer Narmad South Gujarat University, Surat, India
2Science and Humanity Department, Polytechnic, Vidhyabharati Trust, Umarakh, Bardoli, India

Received 5 October 2007; Accepted 3 December 2007

Copyright © 2008 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The chelating ion exchange resin AFM was synthesized by condensation of anthranilic acid with formaldehyde and m-cresol in DMF media at 100 oC ± 6°C. The identification of resin structure was performed by elemental and FTIR analysis. The thermodynamic parameters such as activation energy (Ea), entropy (S*), enthalpy (H*) and free energy (G*) for thermal decomposition were calculated from thermal data. The morphology of AFM resin shows transition material between crystalline and amorphous phase. The rate of exchange was rapid. i.e. t1/2 < 22 min for Pb(II) and pH dependence of exchange of metal ions on the resin has been determined for several metal ions [Ni(II), Cu(II), Zn(II), Cd(II) and Pb(II)]. Successive separations and recovery of some pair of metal ions [Pb(II)-Cd(II), Pb(II)-Zn(II) and Zn(II)- Cu(II)] have been performed by using distribution coefficient (Kd).