title: Kinetic and equilibrium studies of cesium adsorption on ceiling tiles from aqueous solutions.
abstract: 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 (137)Cs. The experiments were performed in the range of initial cesium concentrations of 0.114-23.9 mg L(-1) at room temperature (21°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.
authors: Emergencies Science and Technology Section, Environment Canada, 335 River Road, Ottawa, Ontario, Canada K1A 0H3.
authors: Muhammed Yusuf
authors: MY
authors: Miah
authors: Konstantin
authors: K
authors: Volchek
authors: Wenxing
authors: W
authors: Kuang
authors: F Handan
authors: FH
authors: Tezel
mesh_terms: D000327:Adsorption; D002586:Cesium / Q000302:isolation & purification*; D003252:Construction Materials / Q000032:analysis*; D007700:Kinetics; D013058:Mass Spectrometry; D012996:Solutions
chemical_list: D012996:Solutions; D002586:Cesium