Radiotracer study of the kinetics of complexation and decomplexation of Eu(III) with humic acid using ion exchange View Full Text


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Article Info

DATE

2003-10

AUTHORS

K. Štamberg, P. Beneš, J. Mizera, D. Vopálka, Š. Procházková

ABSTRACT

The kinetics of complexation (C) and decomplexation (D) reactions between Eu(III) and Aldrich humic acid (HA) was investigated as a function of pH (pH 4, 5, 6, 7 and 8) in the system Eu(III) - HA - Amberlite IR-120(Na) (I = 0.1). The derivation of the kinetic differential equations was based on the reactions of Eu3+ with, so called, strong (HAS) and weak (HAW) carboxylic groups of HA formulated in accordance with the new complexation model.1 The differential equations determining d[EuaHAS]/dt and d[EubHAW]/dt have the classical form applicable for reversible reactions where the forward reaction is the C-reaction and the reverse one is the D-reaction. Kinetic model used for the evaluation of experimental data includes these differential equations and the film diffusion model of sorption of Eu3+ on Amberlite IR-120(Na). More... »

PAGES

347-360

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1026246006953

DOI

http://dx.doi.org/10.1023/a:1026246006953

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1002137167


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