Synthesis of iron-based adsorbents and their application in the adsorption of molybdenum ions in nitric acid solution

Gjergj Dodbiba, Toyohisa Fujita, Takahiro Kikuchi, Jayappa Manjanna, Seiji Matsuo, Hideyuki Takahashi, Kazuyuki Tohji

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

A series of " easy-to-prepare" powders was synthesized and their application in the adsorption of Mo ions in 3. mol/L nitric acid solution was investigated. The powders were also calcinated at various temperatures, which effect was investigated as a function of the dissolved Fe concentration in the solution. In addition, the equilibrium sorption isotherm of Mo onto Fe-based adsorbent was analyzed by the Langmuir, Freundlich and Redlich-Peterson sorption models, whereas the adsorption kinetic was analyzed using the intraparticle diffusion model and the pseudo-second order kinetic model. The overall adsorption process was described well by the pseudo-second order kinetic model. It was found that the amount of Mo(VI) ion sorbed at equilibrium was 8.3126. mg/g, with 83% of Mo adsorption occurring the first 10. min and attaining equilibrium was at ca. 150. min. This behavior suggests that the sorption takes place rapidly on the external surface of the adsorbent where the binding may be through interaction with the functional groups located on the surface of the adsorbent.

Original languageEnglish
Pages (from-to)496-503
Number of pages8
JournalChemical Engineering Journal
Volume166
Issue number2
DOIs
Publication statusPublished - 2011 Jan 15

Keywords

  • Adsorption
  • Fe-based adsorbent
  • HLLW
  • Molybdenum
  • Nitric acid solution

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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