Vol 64 No 1 (2019): Journal of the Chilean Chemical Society
Original Research Papers


Merve Duran
Ege University Faculty of Science, Department of Chemistry
Özgür Arar
Ege University Faculty of Science, Department of Chemistry
Müşerref Arda
Faculty of Science, Department of Chemistry, Ege University
Published March 27, 2019
  • Finex AS510GC,
  • Ion exchange,
  • Isophthalic acid,
  • Phthalic acid,
  • Regeneration
How to Cite
Duran, M., Arar, Özgür, & Arda, M. (2019). REMOVAL OF PHTHALIC ACID AND ISOPHTHALIC ACID FROM AQUEOUS SOLUTION BY ANION EXCHANGE RESIN. Journal of the Chilean Chemical Society, 64(1). Retrieved from


This study investigated the efficiency of a strongly basic anion exchange resin for the removal of phthalic acid (also known as orto-phthalic acid) and isophthalic acid in aqueous solutions. Uptake behavior of resin towards phthalic acid and isophthalic acid has been assessed as a function of resin dose, initial solution pH, and temperature. The pseudo-second-order rate equation fitted well kinetic profiles for such sorbates. Phthalic acid and isophthalic acid loading isotherm studies have been performed and experimental data were analyzed by Freundlich, Langmuir and Dubinin–Radusckevich (D-R) equations. The maximum sorption capacity of the resin predicted by the Langmuir model were 397.8 mg g−1 for the phthalic acid and 331.3 mg g−1 for isophthalic acid. The mean free sorption energies through the D-R model suggest that sorption takes place mainly through an ion exchange mechanism. The experimental results illustrated that the sorption of phthalic acid onto anion exchange resin is feasible, spontaneous and exothermic however, sorption of isophthalic acid is endothermic. The successful phthalic acid-loaded resin regeneration in a batch system revealed the higher efficiency of the 2.0 M HCl solution compared to 1.0 M HCl and 1.0 M NaOH as desorbing agents. In the case of isophthalic acid-loaded resin, 2.0 M NaCl solution found to be most efficient regenerant.


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