Abstract
Sorption is often quantified by a distribution coefficient, K d , which is the equilibrium ratio between species sorbed to the rock and species in solution. Traditionally K d -values are determined in batch experiments from equilibrium concentrations.
In this work we describe an approach to determine rate constants for sorption and desorption from data obtained in ordinary batch sorption experiments. By varying the surface area to solution volume ratio in experiments where the dynamics for sorption equilibration is monitored, the rate constants (and consequently the K d -value, which is the quota between forward and backward reactions) can be determined.
To demonstrate the method, sorption of strontium to crushed granite was studied. The K d -value obtained with the kinetic approach was in good agreement with that obtained from equilibrium concentrations.
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Al-Qunaibit, M.H., Mekhemer, W.K., Zaghloul, A.A.: The adsorption of Cu(II) ions on bentonite—a kinetic study. J. Colloid Interface Sci. 283(2), 316–321 (2005)
Benjamin, M.M., Leckie, J.O.: Multiple-site adsorption of Cd, Cu, Zn and Pb on amorphous iron oxyhydroxide. J. Colloid Interface Sci. 79(1), 209–221 (1981)
Crawford, J., Neretnieks, I., Malmström, M.: Data and uncertainty assessment for radionuclide Kd partitioning coefficients in granitic rock for use in SR-Can calculations. Swedish Nuclear Fuel and Waste Management Co., SKB R-06-75 (2006)
Dzombak, D.A., Morel, F.M.M.: Surface Complexation Modelling; Hydrous Ferric Oxide. Wiley-Interscience, New York (1990)
Jonsson, M.: Radiation induced processes at solid-liquid interfaces. In: Wishart, J.F., Rao, B.S.M. (eds.) Recent Trends in Radiation Chemistry, pp. 301–323. World Scientific, Singapore (2010)
Lee, K.Y., Yoon, Y.Y., Lee, S.G., Lee, D.-H., Kim, Y.J., Woo, N.C.: Sorption of radionuclides on the container wall during batch migration studies. J. Radioanal. Nucl. Chem. 249(2), 271–278 (2001)
Montes-Hernandez, G., Rihs, S.: A simplified method to estimate kinetic and thermodynamic parameters on the solid–liquid separation of pollutants. J. Colliod Interf. Sci. 299, 49–55 (2006)
Rügner, H., Kleneidam, S., Grathwohl, P.: Long term sorption kinetics of phenanthrene in aquifer materials. Environ. Sci. Technol. 33(10), 1645–1651 (1999)
Strawn, D.G., Scheidegger, A.M., Sparks, D.L.: Kinetics and mechanisms of Pb(II) sorption and desorption at the aluminum oxide-water interface. Environ. Sci. Technol. 32, 2596–2601 (1998)
Stumm, W., Morgan, J.J.: Aquatic Chemistry, 3rd edn. Wiley, New York (1996), p. 571
Sverjensky, D.A.: Linear free energy relations for predicting dissolution rates of solids. Nature 358, 310–313 (1992)
Sverjensky, D.A.: Physical surface-complexation models for sorption at the mineral-water interface. Nature 364, 776–780 (1993)
Sverjensky, D.A., Molling, P.A.: A linear free energy relationship for crystalline and aqueous ions. Nature 356, 231–234 (1992)
Trivedi, P., Axe, L.: Modeling Cd and Zn sorption to hydrous metal oxides. Environ. Sci. Technol. 34(11), 2215–2223 (2000)
Trivedi, P., Axe, L.: Predicting divalent metal sorption to hydrous Al, Fe, and Mn oxides. Environ. Sci. Technol. 35(9), 1779–1784 (2001)
Wehrli, B., Ibric, S., Stumm, W.: Adsorption kinetics of vanadyl (IV) and chromium (III) to aluminum oxide: Evidence for a two-step mechanism. Colloids Surf. 51, 77–88 (1990)
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Jansson, M., Jonsson, M. & Mohlén, J. Kinetic evaluation of sorption and desorption. Adsorption 16, 155–159 (2010). https://doi.org/10.1007/s10450-010-9208-3
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DOI: https://doi.org/10.1007/s10450-010-9208-3