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-

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 10oC 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

Get the data

This dataset is available under the terms of the Open Government Licence

Format of the dataset : Comma-separated values (CSV)

You must cite: 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

Where/When

Study area
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.

Correspondence/contact details

Prof. George Shaw
University of Nottingham
 george.shaw@nottingham.ac.uk

Authors

Izquierdo, M.
University of Nottingham
Bailey, E.
University of Nottingham
Crout, N.
University of Nottingham
Sanders, H.
University of Nottingham
Young, S.
University of Nottingham
Shaw, G.
University of Nottingham

Other contacts

Custodian
Environmental Information Data Centre
 eidc@ceh.ac.uk
Publisher
NERC Environmental Information Data Centre
 eidc@ceh.ac.uk

Additional metadata

Topic categories
Environment
Keywords
Aerobic soils,  Chernobyl,  Incubation,  Radioecology Soil Technetium
INSPIRE Theme
Soil
Funding
Natural Environment Research Council
Spatial representation type
Tabular (text)
Spatial reference system
WGS 84
Last updated
2019-09-18