Potentiometric and spectroscopic study of uranyl complexation with humic acids

• Authors: LUBAL Přemysl; FETSCH David; ŠIROKÝ David; LUBALOVÁ Milada; ŠENKÝŘ Jaroslav; HAVEL Josef
• Year of publication: 2000
• Type: Article in Periodical
• Magazine / Source: Talanta
• MU Faculty or unit: Faculty of Science
• Web: http://www.elsevier.com/locate/talanta
• Field: Analytic chemistry
• Keywords: Humic acids; Uranyl; Stability constants; Uranyl ion selective electrode
• Description: 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 immobilzed HA can be used, for example, to remove traces of uranyl from waste waters.

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