Çelebi O.Üzüm, C.Shahwan, T.Erten H.N.2016-02-082016-02-0820070304-3894http://hdl.handle.net/11693/23373Recently, 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.EnglishAdsorptionBariumNano-zero-valent ironAdsorptionBariumConcentration (process)Mathematical modelsReaction kineticsThermal effectsKinetic modelsNano-zero-valent ironNanoparticlesbariumironnanoparticletracerAdsorptionBariumConcentration (process)Mathematical modelsNanoparticlesReaction kineticsThermal effectsadsorptionbariumorganic pollutantthermodynamicstraceradsorptionaqueous solutionarticleconcentration (parameters)correlation analysisheavy metal removalisothermkineticstemperaturethermodynamicsAdsorptionBariumIronKineticsMicroscopy, Electron, ScanningNanoparticlesTemperatureThermodynamicsX-Ray DiffractionArticle10.1016/j.jhazmat.2007.06.122