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      A radiotracer study of the adsorption behavior of aqueous Ba2+ ions on nanoparticles of zero-valent iron

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      Author(s)
      Çelebi O.
      Üzüm, C.
      Shahwan, T.
      Erten H.N.
      Date
      2007
      Source Title
      Journal of Hazardous Materials
      Print ISSN
      0304-3894
      Volume
      148
      Issue
      3
      Pages
      761 - 767
      Language
      English
      Type
      Article
      Item Usage Stats
      209
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      237
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      Abstract
      Recently, iron nanoparticles are increasingly being tested as adsorbents for various types of organic and inorganic pollutants. In this study, nanoparticles of zero-valent iron (NZVI) synthesized under atmospheric conditions were employed for the removal of Ba2+ ions in a concentration range 10-3 to 10-6 M. Throughout the study, 133Ba was used as a tracer to study the effects of time, concentration, and temperature. The obtained data was analyzed using various kinetic models and adsorption isotherms. Pseudo-second-order kinetics and Dubinin-Radushkevich isotherm model provided the best correlation with the obtained data. Observed thermodynamic parameters showed that the process is exothermic and hence enthalpy-driven. © 2007 Elsevier B.V. All rights reserved.
      Keywords
      Adsorption
      Barium
      Nano-zero-valent iron
      Adsorption
      Barium
      Concentration (process)
      Mathematical models
      Reaction kinetics
      Thermal effects
      Kinetic models
      Nano-zero-valent iron
      Nanoparticles
      barium
      iron
      nanoparticle
      tracer
      Adsorption
      Barium
      Concentration (process)
      Mathematical models
      Nanoparticles
      Reaction kinetics
      Thermal effects
      adsorption
      barium
      organic pollutant
      thermodynamics
      tracer
      adsorption
      aqueous solution
      article
      concentration (parameters)
      correlation analysis
      heavy metal removal
      isotherm
      kinetics
      temperature
      thermodynamics
      Adsorption
      Barium
      Iron
      Kinetics
      Microscopy, Electron, Scanning
      Nanoparticles
      Temperature
      Thermodynamics
      X-Ray Diffraction
      Permalink
      http://hdl.handle.net/11693/23373
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.jhazmat.2007.06.122
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      • Department of Chemistry 677
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