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

Date
2007
Authors
Çelebi O.
Üzüm, C.
Shahwan, T.
Erten H.N.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Journal of Hazardous Materials
Print ISSN
0304-3894
Electronic ISSN
Publisher
Volume
148
Issue
3
Pages
761 - 767
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Series
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.

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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
Citation
Published Version (Please cite this version)