Fit-for-purpose modelling of radiocaesium soil-to-plant transfer for nuclear emergencies: a review

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Fit-for-purpose modelling of radiocaesium soil-to-plant transfer for nuclear emergencies: a review. / Al Mahaini, Talal; Beresford, Nicholas A.; Crout, Neil M.J.; Sweeck, Lieve.

In: Journal of environmental radioactivity, Vol. 201, 15.02.2019, p. 58-66.

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Al Mahaini, Talal ; Beresford, Nicholas A. ; Crout, Neil M.J. ; Sweeck, Lieve. / Fit-for-purpose modelling of radiocaesium soil-to-plant transfer for nuclear emergencies: a review. In: Journal of environmental radioactivity. 2019 ; Vol. 201. pp. 58-66.

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@article{35df7108bbf846fd8e2d199321a3a8fe,
title = "Fit-for-purpose modelling of radiocaesium soil-to-plant transfer for nuclear emergencies: a review",
abstract = "Numerous radioecological models have been developed to predict radionuclides transfer from contaminated soils to the food chain, which is an essential step in preparing and responding to nuclear emergencies. However, the lessons learned from applying these models to predict radiocaesium (RCs) soil-to-plant transfer following the Fukushima accident in 2011 renewed interest in RCs transfer modelling. To help guide and prioritise further research in relation to modelling RCs transfer in terrestrial environments, we reviewed existing models focussing on transfer to food crops and animal fodders. To facilitate the review process, we categorised existing RCs soil-to-plant transfer models into empirical, semimechanistic and mechanistic, though several models cross the boundaries between these categories. The empirical approach predicts RCs transfer to plants based on total RCs concentration in soil and an empirical transfer factor. The semi-mechanistic approach takes into account the influence of soil characteristics such as clay and exchangeable potassium content on RCs transfer. It also uses ʻbioavailableʼ rather than total RCs in soil. The mechanistic approach considers the physical and chemical processes that control RCs distribution and uptake in soil-plant systems including transport in the root zone and root absorption kinetics. Each of these modelling approaches has its advantages and disadvantages. The empirical approach is simple and requires two inputs, but it is often associated with considerably uncertainty due to the large variability in the transfer factor. The semi-mechanistic approach factorises more soil and plant parameters than the empirical approach; therefore, it is applicable to a wider range of environmental conditions. The mechanistic approach is instrumental in understanding RCs mobility and transfer in soil-plant systems; it also helps to identify influential soil and plant parameters. However, the complexity and the large amount of specific parameters make this approach impractical for nuclear emergency preparedness and response purposes. We propose that the semi-mechanistic approach is sufficiently robust and practical, hence more fit for the purpose of planning and responding to nuclear emergencies compared with the empirical and mechanistic approaches. We recommend further work to extend the applicability of the semi-mechanistic approach to a wide range of plants and soils.",
keywords = "Nuclear emergency, Fukushima, Chernobyl, Radioactive caesium, Soil-to-plant transfer model, Uncertainty",
author = "{Al Mahaini}, Talal and Beresford, {Nicholas A.} and Crout, {Neil M.J.} and Lieve Sweeck",
note = "Score=10",
year = "2019",
month = feb,
day = "15",
doi = "10.1016/j.jenvrad.2019.01.006",
language = "English",
volume = "201",
pages = "58--66",
journal = "Journal of environmental radioactivity",
issn = "0265-931X",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Fit-for-purpose modelling of radiocaesium soil-to-plant transfer for nuclear emergencies: a review

AU - Al Mahaini, Talal

AU - Beresford, Nicholas A.

AU - Crout, Neil M.J.

AU - Sweeck, Lieve

N1 - Score=10

PY - 2019/2/15

Y1 - 2019/2/15

N2 - Numerous radioecological models have been developed to predict radionuclides transfer from contaminated soils to the food chain, which is an essential step in preparing and responding to nuclear emergencies. However, the lessons learned from applying these models to predict radiocaesium (RCs) soil-to-plant transfer following the Fukushima accident in 2011 renewed interest in RCs transfer modelling. To help guide and prioritise further research in relation to modelling RCs transfer in terrestrial environments, we reviewed existing models focussing on transfer to food crops and animal fodders. To facilitate the review process, we categorised existing RCs soil-to-plant transfer models into empirical, semimechanistic and mechanistic, though several models cross the boundaries between these categories. The empirical approach predicts RCs transfer to plants based on total RCs concentration in soil and an empirical transfer factor. The semi-mechanistic approach takes into account the influence of soil characteristics such as clay and exchangeable potassium content on RCs transfer. It also uses ʻbioavailableʼ rather than total RCs in soil. The mechanistic approach considers the physical and chemical processes that control RCs distribution and uptake in soil-plant systems including transport in the root zone and root absorption kinetics. Each of these modelling approaches has its advantages and disadvantages. The empirical approach is simple and requires two inputs, but it is often associated with considerably uncertainty due to the large variability in the transfer factor. The semi-mechanistic approach factorises more soil and plant parameters than the empirical approach; therefore, it is applicable to a wider range of environmental conditions. The mechanistic approach is instrumental in understanding RCs mobility and transfer in soil-plant systems; it also helps to identify influential soil and plant parameters. However, the complexity and the large amount of specific parameters make this approach impractical for nuclear emergency preparedness and response purposes. We propose that the semi-mechanistic approach is sufficiently robust and practical, hence more fit for the purpose of planning and responding to nuclear emergencies compared with the empirical and mechanistic approaches. We recommend further work to extend the applicability of the semi-mechanistic approach to a wide range of plants and soils.

AB - Numerous radioecological models have been developed to predict radionuclides transfer from contaminated soils to the food chain, which is an essential step in preparing and responding to nuclear emergencies. However, the lessons learned from applying these models to predict radiocaesium (RCs) soil-to-plant transfer following the Fukushima accident in 2011 renewed interest in RCs transfer modelling. To help guide and prioritise further research in relation to modelling RCs transfer in terrestrial environments, we reviewed existing models focussing on transfer to food crops and animal fodders. To facilitate the review process, we categorised existing RCs soil-to-plant transfer models into empirical, semimechanistic and mechanistic, though several models cross the boundaries between these categories. The empirical approach predicts RCs transfer to plants based on total RCs concentration in soil and an empirical transfer factor. The semi-mechanistic approach takes into account the influence of soil characteristics such as clay and exchangeable potassium content on RCs transfer. It also uses ʻbioavailableʼ rather than total RCs in soil. The mechanistic approach considers the physical and chemical processes that control RCs distribution and uptake in soil-plant systems including transport in the root zone and root absorption kinetics. Each of these modelling approaches has its advantages and disadvantages. The empirical approach is simple and requires two inputs, but it is often associated with considerably uncertainty due to the large variability in the transfer factor. The semi-mechanistic approach factorises more soil and plant parameters than the empirical approach; therefore, it is applicable to a wider range of environmental conditions. The mechanistic approach is instrumental in understanding RCs mobility and transfer in soil-plant systems; it also helps to identify influential soil and plant parameters. However, the complexity and the large amount of specific parameters make this approach impractical for nuclear emergency preparedness and response purposes. We propose that the semi-mechanistic approach is sufficiently robust and practical, hence more fit for the purpose of planning and responding to nuclear emergencies compared with the empirical and mechanistic approaches. We recommend further work to extend the applicability of the semi-mechanistic approach to a wide range of plants and soils.

KW - Nuclear emergency

KW - Fukushima

KW - Chernobyl

KW - Radioactive caesium

KW - Soil-to-plant transfer model

KW - Uncertainty

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/33742610

U2 - 10.1016/j.jenvrad.2019.01.006

DO - 10.1016/j.jenvrad.2019.01.006

M3 - Article

VL - 201

SP - 58

EP - 66

JO - Journal of environmental radioactivity

JF - Journal of environmental radioactivity

SN - 0265-931X

ER -

ID: 5102135