Factors affecting interaction of radiostrontium with river sediments

P. Beneš; R. Poliak

doi:10.1007/bf02060187

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 141: Issue 1

Factors affecting interaction of radiostrontium with river sediments

Authors:

P. Beneš

P. Beneš Technical University of Prague Department of Nuclear Chemistry Brehová 7 115 19 Prague 1 (Czechoslovakia)

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R. Poliak

R. Poliak Technical University of Prague Department of Nuclear Chemistry Brehová 7 115 19 Prague 1 (Czechoslovakia)

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Pages:: 75–90

Online Publication Date:: 14 Aug 2005

Publication Date:: 17 Jul 1990

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02060187

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Abstract

Uptake of radiostrontium by sediments from two small streams was studied as a function of pH and composition of aqueous phase, of the concentration of strontium, of contact time, temperature and liquid-to-solid ratio (V/m), using laboratory model experiments. Between pH 5 and 12 the uptake increased with pH and shifted to higher pH values with increasing V/m ratio. Addition of cations suppressed the uptake in the order Na⁺<K⁺<Ca²⁺. Increase in strontium concentration had negligible effect up to 10^–5–10^–4 mol·dm^–3 concentration due to high concentrations of dissolved and exchangeable strontium present in the systems. The V/m ratio had no influence on K_d in the range of V/m=20–446 cm³ · g^–1 but K_d value for V/m=0.79 cm³ · g^–1 was significantly lower. Two-step kinetics of the uptake was observed in most cases with a rapid first step (<100 min) followed by a slow increase. No difference was found between the uptake at 10°C and 22°C. Adsorbed radiostrontium could be easily desorbed with river water. The easiness of desorption decreased with repeated desorption. Drying of sediment did not affect the first desorption, repeated desorptions slightly decreased. Conclusions were drawn on the mechanism of radiostrontium uptake and on the importance of the factors studied for modelling of radiostrontium 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)