Uptake of technetium-99 by food crops under field conditions
Levchuk, Sviatoslav; Howard, Brenda ORCID: https://orcid.org/0000-0002-9698-9524; Kashparov, Valery; Yoschenko, Vasyl; Hurtevent, Pierre. 2024 Uptake of technetium-99 by food crops under field conditions. Journal of Environmental Radioactivity, 276, 107442. 9, pp. 10.1016/j.jenvrad.2024.107442
Full text not available from this repository.Abstract/Summary
Long-term field experiments have been carried out in the Chornobyl Exclusion zone to determine parameters describing technetium (99Tc) transfer into five food plants (Lettuce, Radish, Wheat, Bean, and Potato) from four types of soil, namely Podzoluvisol, Greyzem, Phaeozem, and Chernozem. Technetium was added to the soils under field conditions in a pertechnetate form. In the first two years, soil type had little effect on Tc uptake by plants. In the first and second years after contamination, the concentration ratios (CR), defined as 99Tc activity concentration in the crop (dry weight) divided by that in the soil (dry weight), for radish roots and lettuce leaves ranged from 60 to 210. For potato tubers, the CR was d 0.4–2.3, i.e., two orders of magnitude lower than for radish and lettuce, and for summer wheat grain it was lower at 0.6 ± 0.1. After 8–9 years, root uptake of 99Tc by wheat decreased by 3–7 fold (CR from 0.016 ± 0.005 to 0.12 ± 0.034) and only 13–22 % of the total 99Tc added remained in the upper 20 cm soil layers. The time taken for half of the added 99Tc to be removed from the 20-cm arable soil layer due to vertical migration and transfer to plants was short at c. 2–3 years.
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | 10.1016/j.jenvrad.2024.107442 |
UKCEH and CEH Sections/Science Areas: | UKCEH Fellows |
ISSN: | 0265-931X |
Additional Keywords: | 99Tc, technetium, soil, plant, concentration ratio, root uptake, radioecology |
NORA Subject Terms: | Ecology and Environment Agriculture and Soil Science Physics |
Date made live: | 07 May 2024 15:20 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/537402 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year