In:
Radiochimica Acta, Walter de Gruyter GmbH, Vol. 88, No. 9-11 ( 2000-9-1), p. 717-723
Abstract:
Sorption coefficients of Am(III) and Cm(III) on kaolinite were determined at pH from 3.5 to 10 and humic acid (HA) concentrations of 0 to 20 ppm at ionic strength of 0.1 M (NaClO 4 ) at 298 K with N 2 bubbling. The sorption ratio of HA on kaolinite was also measured under the same experimental conditions. The sorption coefficients of Am(III) and Cm(III) in the absence of HA increased with pH over the whole pH range. The presence of HA enhanced sorption coefficients at pH values up to around 5, above which the sorption coefficients were lowered by introducing HA. The effects of HA on sorption coefficients were interpreted by the use of a linear additive model, modified for metal-humate complex formation in the aqueous phase. The model was found to be in fairly good agreement with the experimental data.
Type of Medium:
Online Resource
ISSN:
2193-3405
,
0033-8230
DOI:
10.1524/ract.2000.88.9-11.717
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2000
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