Magnetite modified with amine polymer to adsorb indium ions

Chyow San Chiou, Kai Jen Chuang, Hua Wei Chen, Yi Chen Chen

Research output: Contribution to journalArticle

7 Citations (Scopus)


Indium is one of the contaminants of the optoelectronics industry, and adsorption is a potential treatment method for this pollutant. A magnetic adsorbent manufactured from magnetite (Fe3O4) can be easily recovered from treated water by magnetic force without requiring further downstream treatment. In this research, the surface of magnetite is modified with oleic acid, methyl methacrylate and ethylenediamine (EDA/MMA/OA/Fe3O4). A magnetic adsorbent (EDA/MMA/OA/Fe3O4) made by magnetite modified with oleic acid, methyl methacrylate and ethylenediamine was used to adsorb indium ions solution in a batch system. The indium ions adsorption behavior by EDA/MMA/OA/Fe3O4 was in good agreement with both the Langmuir and Freundlich adsorption isotherm. The maximum adsorption capacity (qm) and Gibbs free energy of indium ions at 298K was 54.18mgg-1 and -17.94kJmol-1, respectively. A pseudo-second-order model could best describe the adsorption kinetics, and the derived activation energy was 5.96kJmol-1. The optimal condition of indium ions desorption from EDA/MMA/OA/Fe3O4 was provided by 0.01M HNO3 in aqueous solution.

Original languageEnglish
Pages (from-to)247-253
Number of pages7
JournalPowder Technology
Publication statusPublished - Jul 1 2015



  • Adsorb
  • Ethylenediamine
  • Indium ions
  • Magnetic adsorbent

ASJC Scopus subject areas

  • Chemical Engineering(all)

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