Cationic dye adsorption by poly(N-isopropylacrylamide/maleic acid) copolymeric hydrogels prepared by gamma rays

Betül Taşdelen*, A. Erdal Osmanlioglu, Erol Kam

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

N-isopropylacrylamide/maleic acid hydrogels containing different quantities of maleic acid have been synthesized with γ-radiation. The hydrogels were used in experiments on swelling, diffusion and adsorption of a cationic dye methylene blue. The diffusion of MB into the hydrogels was found to be the non-Fickian type. The factors influencing adsorption capacity of the hydrogel such as gel composition, and irradiation dose were systematically investigated. The equilibrium data for dye adsorption was better described by the Freundlich isotherm than Langmuir isotherm model. The kinetic studies showed that the pseudo-second-order kinetic model fits better than the data obtained from pseudo-first-order model.

Original languageEnglish
Pages (from-to)1469-1476
Number of pages8
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume298
Issue number3
DOIs
Publication statusPublished - Dec 2013
Externally publishedYes

Keywords

  • γ-Rays
  • Copolymers
  • Dye uptake
  • Hydrogel
  • Maleic acid
  • N-isopropylacrylamide

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