Factors affecting interaction of radiocobalt with river sediments: II. Composition and concentration of sediment, temperature

P. Beneš; M. Jurák; M. Černík

doi:10.1007/bf02136082

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 132: Issue 2

Factors affecting interaction of radiocobalt with river sediments

II. Composition and concentration of sediment, temperature

Authors:

P. Beneš

P. Beneš Technical University of Prague Department of Nuclear Chemistry Břehová 7 115 19 Prague Czechoslovakia

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M. Jurák

M. Jurák Technical University of Prague Department of Nuclear Chemistry Břehová 7 115 19 Prague Czechoslovakia

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M. Černík

M. Černík Technical University of Prague Department of Nuclear Chemistry Břehová 7 115 19 Prague Czechoslovakia

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Pages:: 225–239

Online Publication Date:: 16 Sep 2005

Publication Date:: 17 Aug 1989

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02136082

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Abstract

The paper aims at the analysis of principal factors affecting the interaction of radiocobalt with freshwater solids, important for migration of radiocobalt in surface streams. Uptake of radiocobalt by sediment from a small river have been studied as a function of composition of the sediment, of liquid-to-solid ratio (V/m) and of temperature, using laboratory model experiments. The study of the effect of sediment composition was based on selective extraction of the sediment prior to the uptake and indicated that radiocobalt was sorbed on several components of the sediment simultaneously, probably on clay minerals, organic matter and oxidic coatings. Relative importance of these components depends on the pH and composition of the aqueous phase and on the concentration of radiocobalt. Distribution coefficient K_d characterizing the uptake of radiocobalt is nearly independent of the V/m ratio in V/m range typical for rivers, but decreased at V/m<1.7 dm³·g^–1. Increase in temperature from 13°C to 23°C accelerate radiocobalt uptake but did not affect the equilibrium value of the uptake. Results obtained are compared with literature data and conclusions are drawn concerning the importance of the factors studied for modelling of radiocobalt migration in rivers.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)