Development of iron oxide/activated carbon nanoparticle composite for the removal of Cr(VI), Cu(II) and Cd(II) ions from aqueous solution

Monika Jain, Mithilesh Yadav, Tomas Kohout, Manu Lahtinen, Vinod Kumar Garg, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

240 Citations (Scopus)

Abstract

Iron oxide (Fe3O4) and iron oxide/activated carbon (Fe3O4/AC) were fabricated by co-precipitation method for the removal of Cr(VI), Cu(II) and Cd(II) ions from aqueous solution in batch mode. These nanoparticles were characterized by BET, FTIR, XRD, SEM/TEM and VSM. The optimum conditions for the removal of ions were pH = 2 for Cr(VI) and 6 for Cu(II) and Cd(II), initial metal ion concentration = 50 mg L-1, nanoparticle dose = 50 mg/10 mL, temperature = 25 ± 1 °C, shaking speed = 180 rpm and contact time = 3 h. The equilibrium data of ions sorption were well described by Langmuir, Freundlich, Redlich-Peterson and Intraparticle Diffusion model. The R2 values obtained by Langmuir model were highest by Fe3O4/AC for Cr(VI) = 0.9994,Cu(II) = 0.9998 and Cd(II)= 0.9750. The temperature dependent study in the range of 288-328 K confirmed that the adsorption process was endothermic in nature. Desorption studies with 0.1 M HCl stated that these nanoparticles can be regenerated effectively and can be used after four adsorption-desorption cycles without any mass loss.

Original languageEnglish
Pages (from-to)54-74
Number of pages21
JournalWater Resources and Industry
Volume20
DOIs
Publication statusPublished - Dec 2018
Externally publishedYes

Keywords

  • Activated carbon
  • Iron oxide nanoparticles
  • TEM
  • XRD
  • pH

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology

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