Removal of Pb(II) ions from aqueous solutions using functionalized cryogels

Mi Young Kim, Tai Gyu Lee

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


In this study, a poly(allylamine-co-methacrylamide-co-acrylic acid) (p(AA-co-MA-co-AAc)) cryogel containing amine and carboxyl groups was prepared and subsequently functionalized with thiourea using methyl isothiocyanate. The functionalized p(AA-co-MA-co-AAc) cryogel was then applied to the adsorption of lead (Pb) ions from aqueous solution, and the amount of Pb adsorption was measured. The functionalized p(AA-co-MA-co-AAc) cryogel was analyzed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and its chemical structure, pore shape, pore distribution and specific surface area were confirmed. To determine the effect of the solution pH and initial concentration on Pb adsorption by the functionalized p(AA-co-MA-co-AAc) cryogel, Pb adsorption tests were performed. The functionalized p(AA-co-MA-co-AAc) cryogel exhibited the highest adsorption amount at pH 7 and 400 mg L−1. The Pb adsorption process was determined to occur through chemical adsorption because the experimental data were fit well by a pseudo-second-order model. In addition, the equilibrium isotherm data fit the Langmuir isotherm better than the Freundlich model, indicating that the functionalized p(AA-co-MA-co-AAc) cryogel surfaces were uniform and that a lead adsorbate monolayer formed at equilibrium.

Original languageEnglish
Pages (from-to)423-429
Number of pages7
Publication statusPublished - 2019 Feb

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2017R1D1A1B03030722 ).

Publisher Copyright:
© 2018 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis


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