Izquierdo, M.; Bailey, E.; Crout, N. ; Sanders, H. ; Young, S.; Shaw, G.
Technetium-99 (99Tc) transformations in aerobic soils following experimental addition of the radioactive anion 99TcO4-
Cite this dataset as:
Izquierdo, M.; Bailey, E.; Crout, N. ; Sanders, H. ; Young, S.; Shaw, G. (2019). Technetium-99 (99Tc) transformations in aerobic soils following experimental addition of the radioactive anion 99TcO4-. NERC Environmental Information Data Centre. https://doi.org/10.5285/4622f906-e28a-4210-aa03-d2e4169b1be8
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This dataset is available under the terms of the Open Government Licence
https://doi.org/10.5285/4622f906-e28a-4210-aa03-d2e4169b1be8
The data comprise measurements of the 'soluble', 'adsorbed' and 'organically bound' 99Tc concentrations in a diverse set of soils following experimental addition of 99TcO4- and incubation in the laboratory under controlled temperature conditions for 897 days.
The long term behaviour of 99Tc in aerobic soils was studied by conducting a laboratory-based experiment in which a set of 20 topsoils from central England with contrasting properties (e.g. pH, organic matter content, land use) were contaminated with 99TcO4- and incubated in the dark, in a moist but aerobic condition, at a temperature of 10 deg C for 2.5 yr. The physico-chemical transformations of 99Tc in each soil microcosm were periodically monitored by means of a three-step sequential extraction procedure conducted on subsamples of incubated soil.
The resulting dataset enabled quantification of the kinetics of 99Tc transformation in aerobic soils as a function of soil properties and land uses (arable, grassland and moorland/woodland). The data will be useful in developing models of long-term 99Tc bioavailability in aerobic soils under temperate conditions.
The long term behaviour of 99Tc in aerobic soils was studied by conducting a laboratory-based experiment in which a set of 20 topsoils from central England with contrasting properties (e.g. pH, organic matter content, land use) were contaminated with 99TcO4- and incubated in the dark, in a moist but aerobic condition, at a temperature of 10 deg C for 2.5 yr. The physico-chemical transformations of 99Tc in each soil microcosm were periodically monitored by means of a three-step sequential extraction procedure conducted on subsamples of incubated soil.
The resulting dataset enabled quantification of the kinetics of 99Tc transformation in aerobic soils as a function of soil properties and land uses (arable, grassland and moorland/woodland). The data will be useful in developing models of long-term 99Tc bioavailability in aerobic soils under temperate conditions.
Publication date: 2019-08-27
View numbers valid from 01 June 2023 Download numbers valid from 20 June 2024 (information prior to this was not collected)
Format
Comma-separated values (CSV)
Spatial information
Study area
Spatial representation type
Tabular (text)
Spatial reference system
WGS 84
Temporal information
Temporal extent
2014-11-01 to 2017-05-31
Provenance & quality
At each sampling time, a portion of ca. 4 g soil from each microcosm was subjected to a three-step sequential extraction procedure devised to quantify (i) the ‘soluble’ 99Tc, which was extracted with 0.01 M KNO3; (ii) the ‘specifically adsorbed’ 99Tc, extracted with 0.16 M KH2PO4; and (iii) the ‘organically bound’ 99Tc associated with humic and fulvic acids, dissolved with 10% tetra methyl ammonium hydroxide (TMAH) solution. Soil extracts were analysed using a Thermo Fisher Scientific iCAP-Q ICP-MS operating with a collision cell using He with kinetic energy discrimination. The Radioactive Standard NIST SRM 4288B (31.55 kBq g-1 of 99TcO4- in 0.001M KOH) was used for calibration.
Licensing and constraints
This dataset is available under the terms of the Open Government Licence
Cite this dataset as:
Izquierdo, M.; Bailey, E.; Crout, N. ; Sanders, H. ; Young, S.; Shaw, G. (2019). Technetium-99 (99Tc) transformations in aerobic soils following experimental addition of the radioactive anion 99TcO4-. NERC Environmental Information Data Centre. https://doi.org/10.5285/4622f906-e28a-4210-aa03-d2e4169b1be8
© Natural Environment Research Council
© University of Nottingham
© Environment Agency
© Radioactive Waste Management
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Correspondence/contact details
Authors
Sanders, H.
University of Nottingham
Other contacts
Custodian
NERC EDS Environmental Information Data Centre
info@eidc.ac.uk
Publisher
NERC Environmental Information Data Centre
info@eidc.ac.uk