An investigation of possible processes of radiocaesium release from organic upland soils to water bodies

J. Hilton, P. Spezzano

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Abstract

A series of samples taken during a rain storm from two streams feeding into a small lake were analysed for major ions and radiocaesium. Changes in137Cs content in both streams showed no relationship to ammonia or dissolved organic carbon concentrations, suggesting that neither competition at illitic frayed-edge sites nor chelation of radiocaesium were important remobilization processes. One stream contained significantly higher dissolved radiocaesium concentrations than the other. In the former stream, peaks and troughs in radiocaesium concentrations corresponded with changes in calcium, pH and alkalinity. However the pH was related directly with the radiocaesium, whereas the proposed mechanism of humic mediated sorption to solids would infer an inverse relationship with pH. The positive Ca and pH relationships with radiocaesium implied that, in the flooded fibrous-peat soils (peat bogs) encountered in its subcatchment, radiocaesium was sorbed to the soils by simple ion exchange processes. © 1994.
Original languageEnglish
Pages (from-to)975 - 983
Number of pages9
JournalWater Research
Volume28
Issue number4
DOIs
Publication statusPublished - 1994
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Earth-Surface Processes

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