Transfer pathways of 54Mn, 57Co, 85Sr, 103Ru and 134Cs in rice and radish plants directly contaminated at different growth stages

Choi, Yong-Ho; Lim, Kwang-Muk; Yu, Dawei; Park, H.G; Lee, C.M

doi:10.1016/s0306-4549(01)00048-2

Cited by 27 publications

(20 citation statements)

References 25 publications

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“…Translocation factors (TF) reflected the differences in mobility between the radionuclides inside the plant, as former studies noted for cesium and strontium [5]. In our study, TFs highlighted a very low mobility of tellurium.…”

Section: Rainfall Effect On the Radionuclide Washing Off From The Leavessupporting

confidence: 79%

Foliar contamination of plants with aerosols of¹³⁷Cs,⁸⁵Sr,¹³³Ba and¹²³mTe: Influence of rain

2005

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Abstract. Two types of plants (lettuce and radish) were contaminated by dry deposition of radioactive aerosols ( 137 Cs, 85 Sr, 133 Ba and 123m Te). Due to the rain efficiency in decreasing radiological contamination of crops, a rain scenario was applied on the two types of plants. These experiments aimed at improving the prediction of the consequences on agricultural products of a nuclear accident occurring on a PWR, and at improving the understanding of the different processes occurring between contamination and harvest. For a plant species at a given stage of its growth cycle, the interception of the four radionuclides was found to be identical and varied from 68% for radish to 75% (at the middle of ripeness stage) or 78% (at the mature plant stage). Using a conceptual model, the predominance between the two processes -washing-off the leaves and absorption through the leaves cuticles allowing translocation -was evidenced. For Cs, Sr and Ba, for both the lettuce and the radish, washing-off on the foliar cover was the most significant during the first rain. The absorption process inside the plant became dominant only from the third rain event. Tellurium had a particular behaviour: it was non-mobile and stayed put on the leaves. The values of the washing-off and absorption coefficients were estimated. The global transfer factor values were dependant on both the radionuclides and the plant species; nevertheless, a higher value was obtained for cesium, regardless of the plant and the rainfall (from 0.06 m².kg fresh -1 for radish to 0.1 m².kg fresh -1 for a whole lettuce).

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Section: Rainfall Effect On the Radionuclide Washing Off From The Leavessupporting

confidence: 79%

Foliar contamination of plants with aerosols of¹³⁷Cs,⁸⁵Sr,¹³³Ba and¹²³mTe: Influence of rain

2005

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“…In the 2 nd year, the T ag -values increased even when the interception decreased, and this can be explained by the fact that a lower biomass will contribute to higher T ag -values, even with lower interception (see Table 2 for values on the biomass). Other contributing factors could be the dilution of radionuclide concentration due to the growth of the biomass (Coughtrey and Thorne, 1983), the leaves falling-off during the time between the deposition and sampling occasion (Colle et al, 2009;Eriksson et al, 1998) and the decay rate of the radionuclides (Choi et al, 2002).…”

Section: Activity Concentration Of 134 Cs and 85 Srmentioning

confidence: 99%

Interception and retention of wet-deposited radiocaesium and radiostrontium on a ley mixture of grass and clover

Bengtsson¹,

Gärdenäs²,

Eriksson³

et al. 2014

Science of The Total Environment

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"NOTICE: this is the author's version of a work that was accepted for publication in . Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in SCIENCE OF THE TOTAL ENVIRONMENT, [VOL 497-498 (2014) AbstractThe aims of this study were to assess the potential radioactive contamination of fodder in the case of accidental radionuclide fallout, and to analyse the relationship between interception and retention of radionuclides as a function of biomass and Leaf Area Index (LAI). The interception and the retention of wet deposited 134 Cs and 85 Sr in ley (a mixture of grass and clover) were measured after artificial wet deposition in a field train in Uppsala (eastern central Sweden). The field trial had a randomised block design with three replicates. 134Cs and 85 Sr were deposited at six different growth stages during two growing seasons (20101 and 2011) using a rainfall simulator. The biomass was sampled in the centre of each parcel 2 to 3 h after deposition and at later growth stages (1 to 5) during the growing season. The above ground biomass and LAI were measured as well.The interception of radionuclides by the ley was largest at the late growth stages; the spike and tassel/flowering (code 5:6) in the 1 st year, and at flowering/initial flowering (code 6:5) in the 2 nd year. There was a correlation between radionuclide interception and above ground biomass, as well with LAI, for both radionuclides in both years. The highest activity concentrations of both radionuclides were measured after deposition at the late growth stages and were found to be higher in the 2 nd year. There weathering half-lives were shorter at the earlier growth stages than at the later growth stages for both radionuclides. For the magnitude of deposition chosen in our experiment, it can be concluded that the above ground biomass is a good predictor and the LAI a more uncertain predictor of the interception of radiocaesium and radiostrontium by ley grass and clover.

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“…In this review the translocation factor (FTl) will be expressed as the ratio between the activity of the edible part within 1 m 2 of crops at harvest time (Bq m À2 ) and the foliage activity of 1 m 2 of crops at the time of deposit (Bq m À2 ), (Voigt et al, 1991;Choi et al, 2002a). The translocation factor will be expressed in percentages (%) (Middleton, 1958(Middleton, , 1959Middleton and Squire, 1963;Aarkrog, 1969Aarkrog, , 1972Aarkrog, , 1975Aarkrog, , 1983Aarkrog and Lippert, 1971;Delmas et al, 1969Delmas et al, , 1970Delmas et al, , 1971.…”

Section: Definitionmentioning

confidence: 99%

Foliar transfer into the biosphere: review of translocation factors to cereal grains

Colle¹,

Madoz-Escande²,

Leclerc³

2009

Journal of Environmental Radioactivity

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Transfer pathways of 54Mn, 57Co, 85Sr, 103Ru and 134Cs in rice and radish plants directly contaminated at different growth stages

Cited by 27 publications

References 25 publications

Foliar contamination of plants with aerosols of¹³⁷Cs,⁸⁵Sr,¹³³Ba and¹²³mTe: Influence of rain

Foliar contamination of plants with aerosols of¹³⁷Cs,⁸⁵Sr,¹³³Ba and¹²³mTe: Influence of rain

Interception and retention of wet-deposited radiocaesium and radiostrontium on a ley mixture of grass and clover

Foliar transfer into the biosphere: review of translocation factors to cereal grains

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Transfer pathways of 54Mn, 57Co, 85Sr, 103Ru and 134Cs in rice and radish plants directly contaminated at different growth stages

Cited by 27 publications

References 25 publications

Foliar contamination of plants with aerosols of137Cs,85Sr,133Ba and123mTe: Influence of rain

Foliar contamination of plants with aerosols of137Cs,85Sr,133Ba and123mTe: Influence of rain

Interception and retention of wet-deposited radiocaesium and radiostrontium on a ley mixture of grass and clover

Foliar transfer into the biosphere: review of translocation factors to cereal grains

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Foliar contamination of plants with aerosols of¹³⁷Cs,⁸⁵Sr,¹³³Ba and¹²³mTe: Influence of rain

Foliar contamination of plants with aerosols of¹³⁷Cs,⁸⁵Sr,¹³³Ba and¹²³mTe: Influence of rain