Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 183, Issue 1-3, Pages 712-717Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2010.07.084
Keywords
Cesium adsorption; Construction materials; Adsorption equilibrium; Adsorption kinetics
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Funding
- Chemical, Biological, Radiological, Nuclear, and Explosive Research and Technology Initiative (CRTI) [06-0156RD]
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A series of experiments were performed to quantify the adsorption of cesium on ceiling tiles as a representative of urban construction materials. Adsorption was carried out from solutions to mimic wet environmental conditions. Non-radioactive cesium chloride was used as a surrogate of the radioactive Cs-137. The experiments were performed in the range of initial cesium concentrations of 0.114-23.9 mg L-1 at room temperature (21 degrees C) around three weeks. Solution samples were taken after set periods of time and analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The quantity of adsorbed Cs was calculated by mass balance as a function of time. Two kinetic and three equilibrium models were employed to interpret the test results. Determination of kinetic parameters for adsorption was carried out using the first-order reaction model and the intra-particle diffusion model. Adsorption equilibrium was studied using Langmuir, Freundlich and three-parameter Langmuir-Freundlich adsorption isotherm models. A satisfactory correlation between the experimental and the predicted values was observed. Crown Copyright (c) 2010 Published by Elsevier B.V. All rights reserved.
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