Kinetic and equilibrium studies of cesium adsorption on ceiling tiles from aqueous solutions.
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.
Miah
Muhammed Yusuf
MY
Emergencies Science and Technology Section, Environment Canada, 335 River Road, Ottawa, Ontario, Canada K1A 0H3.
Volchek
Konstantin
K
Kuang
Wenxing
W
Tezel
F Handan
FH
D000327:Adsorption; D002586:Cesium / Q000302:isolation & purification*; D003252:Construction Materials / Q000032:analysis*; D007700:Kinetics; D013058:Mass Spectrometry; D012996:Solutions
D012996:Solutions; D002586:Cesium