Potentiometric and spectroscopic study of uranyl complexation with humic acids

By potentiometric study using a specific uranyl ion-selective electrode, the formation of 1:1 and 1:2 (metal:ligand) complexes of uranyl with various humic acids (HAs) was found. The conditional stability constants were calculated using the LETAGROP-ETITR program. Possible structures of the complexe...

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Bibliographic Details
Published in:Talanta (Oxford) 2000-04, Vol.51 (5), p.977-991
Main Authors: Lubal, P., Fetsch, D., Široký, D., Lubalová, M., Šenkýr, J., Havel, J.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Geochemistry
Geochemistry: general, methodology, regional studies
Humic acids
Pollution, environment geology
Stability constants
Uranyl
Uranyl ion selective electrode
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Summary:By potentiometric study using a specific uranyl ion-selective electrode, the formation of 1:1 and 1:2 (metal:ligand) complexes of uranyl with various humic acids (HAs) was found. The conditional stability constants were calculated using the LETAGROP-ETITR program. Possible structures of the complexes are proposed. Stability constants were found to be rather high indicating that immobilized HA can be used, for example, to remove traces of uranyl from waste waters.
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(00)00281-2