Pedogenic Fractionation and Bioavailability of Uranium and Thorium in Naturally Radioactive Spodosols

Autor:	L. S. Morton, G. Harbottle, C. V. Evans, G. O. Estes
Rok vydání:	2001
Předmět:	Radionuclide chemistry.chemical_compound Pedogenesis chemistry Environmental chemistry Extraction (chemistry) Soil water Soil Science Fractionation Ammonium oxalate Podzol Nuclear chemistry Bioavailability
Zdroj:	Soil Science Society of America Journal. 65:1197-1203
ISSN:	0361-5995
DOI:	10.2136/sssaj2001.6541197x
Popis:	Plant uptake of radionuclides into the human food chain is one of many vectors used for calculating exposure rates and performing risk assessment. This study provides a pedogenic assessment of soil-plant relationships in terms of their relationships to nuclide bioavailability. The objectives of this study were (i) to identify assodations of U and Th with pedogenic fractions and with soil properties, and (ii) to evaluate U and Th bioavailability in terms of soil processes. We collected composite samples of leaves, stems, AE and Bs horizons from 10 plots containing a Spodosol with naturally high levels of 238 U and 232 Th. Additional replicate subsamples of fine (
Databáze:	OpenAIRE
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