Foliar contamination of Phaseolus vulgaris with aerosols of 137Cs, 85Sr, 133Ba and 123mTe: influence of plant development stage upon contamination and rain

Madoz-Escande, C.; Henner, Pascale; Bonhomme, T.

doi:10.1016/j.jenvrad.2003.08.001

Cited by 39 publications

(38 citation statements)

References 37 publications

(61 reference statements)

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“…In a comparable experiment, Chadwick and Chamberlain (1970), found the interception of grass to be in a similar range ( 85 Sr: 0.20-0.82), as in the presented study ( 134 Cs: >0.01-0.76; 85 Sr: >0.01-0.80). Similarly, Eriksson et al (1998) and Madoz-Escande et al (2004) found in a comparable experiment on leys and common beans that the highest f for 134 Cs (0.71, ours: 0.76) and for 85 Sr (1.11, ours: 0.80) is 24 h after deposition, with f increasing with the biomass.…”

Section: Calculations Of Interception and Transfersupporting

confidence: 79%

“…One of the most important pathway for the transfer of radionuclides, 90 Sr and 137 Cs, to humans is through milk and meat consumption of animals that feed on contaminated fodder from ley and pasture (Fasenko et al, 2009;Gastberger et al, 2001;UNSCEAR, 2008). Milk obtained from contaminated agricultural fodder is a main source of the total collective dose to humans (Lepicard and Dubreuil, 2001;Madoz-Escande et al, 2004;Middleton, 1958). The levels of milk contamination by radionuclides depends on, among others, the foliar absorption by plant leaves and shoots, the root uptake of radionuclides from soil to crops, the consumption of contaminated soil by animals and the transfer of radionuclides from forage vegetation to milk (Gastberger et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Calculations Of Interception and Transfersupporting

confidence: 79%

Section: Introductionmentioning

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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“…In this conceptual model, the foliage was separated into two different compartments, in which the 2 specific processes took place: a mechanical (wash off) and a physiological (absorption) behaviour [3]. These two processes occurred at the time of the rain event only.…”

Section: Modellingmentioning

confidence: 99%

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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“…radiocaesium and radiostrontium, are taken up by the vegetation directly through leaves. There is limited information on the direct uptake rate of radionuclides and as well the rate of intercepted radionuclides by plants, directly after the occurrence of wet deposition in a growing crop [3]. The level of interception by plant parts depends on climate conditions like precipitation, wind speed, physico-chemical form of the radionuclides, plant morphology and biomass density [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…There is limited information on the direct uptake rate of radionuclides and as well the rate of intercepted radionuclides by plants, directly after the occurrence of wet deposition in a growing crop [3]. The level of interception by plant parts depends on climate conditions like precipitation, wind speed, physico-chemical form of the radionuclides, plant morphology and biomass density [3][4][5]. The proportion of precipitation that can be held by the plant canopy is quickly declining after that the maximum holding capacity of leaves have been reached, which is related to the amount and intensity of the precipitation as well as the plant morphology i.e.…”

Section: Introductionmentioning

confidence: 99%

Interception of wet deposited and transfers of radiocaesium and radiostrontium byBrássica napusL. andTríticum aestívumL.

et al. 2011

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Abstract. The aim of this study is to assess the interception and transfer to edible part of wet deposited 134 Cs and 85 Sr to spring oilseed rape and spring wheat and the dependency of the intercepted fraction on the development stage e.g. the total plant biomass. The radionuclides, 134 Cs and 85 Sr, were deposited at six different development stages using a rainfall simulator. The results showed that there was a positive correlation between the interception fraction for 134 Cs and 85 Sr and the biomass both for spring oilseed rape and spring wheat. The interception fraction and transfer factors were highest at growing stage of senescence (ripening) for both crops.

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Foliar contamination of Phaseolus vulgaris with aerosols of 137Cs, 85Sr, 133Ba and 123mTe: influence of plant development stage upon contamination and rain

Cited by 39 publications

References 37 publications

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

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

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

Interception of wet deposited and transfers of radiocaesium and radiostrontium byBrássica napusL. andTríticum aestívumL.

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Foliar contamination of Phaseolus vulgaris with aerosols of 137Cs, 85Sr, 133Ba and 123mTe: influence of plant development stage upon contamination and rain

Cited by 39 publications

References 37 publications

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

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

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

Interception of wet deposited and transfers of radiocaesium and radiostrontium byBrássica napusL. andTríticum aestívumL.

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