Plant uptake of radionuclides in lysimeter experiments

Gerzabek, Martin H.; Strebl, F.; Temmel, B.

doi:10.1016/s0269-7491(97)00167-x

Cited by 74 publications

(39 citation statements)

References 12 publications

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“…Geralmente, o 226 Ra é adsorvido por meio da formação de complexos de esfera externa, onde forças eletrostáticas são predominantes (Langmuir, 1997). Muito pouco se conhece sobre a transferência de radionuclídeos das cadeias de decaimento primordiais (radionuclídeos naturais); a maioria das investigações refere-se ao 226 Ra, embora determinações ocasionais de 228 Ra, 210 Pb e 238 U possam ocorrer (Gerzabek et al, 1998;Wasserman et al, 2000Wasserman et al, , 2002aWasserman & Lauria, 2002;Ewers et al, 2003). O 226 Ra é o isótopo mais importante de ocorrência na natureza, devido à sua meia-vida longa (1622 anos), associada à abundância do seu precursor ( 238 U) (Molinari & Snodgras, 1990).…”

Section: Introductionunclassified

Geoquímica de radionuclídeos naturais em solos de áreas circunvizinhas a uma Unidade de Mineração e Atividade de Urânio

Cardoso¹,

Sobrinho

Wasserman

et al. 2009

Rev. Bras. Ciênc. Solo

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Section: Introductionunclassified

Geoquímica de radionuclídeos naturais em solos de áreas circunvizinhas a uma Unidade de Mineração e Atividade de Urânio

Cardoso¹,

Sobrinho

Wasserman

et al. 2009

Rev. Bras. Ciênc. Solo

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“…Soil pH has an important influence on their solubility (Bergeijk et al, 1992). For a more realistic description of the transfer of radionuclides from soil to plant material Gerzabek et al (1998) introduced the calculation of "fluxes" using additional information like yield and growth time.…”

Section: Methodsmentioning

confidence: 99%

Availability of radiocasium in plant from soil: facts, mechanism and modelling

2013

Global NEST Journal

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Radiocaesium is an isotope that can enter the food chain after having been absorbed by plants from soil. Our ability to predict the consequences of an accidental release of 137 Cs depends mainly on the level of understanding of the mechanisms involved in 137 Cs interactions with different components of agricultural and natural ecosystems and their formalization into predictive models. In this study the impact of some environmental and physiological factors, such as root density and presence of AM (Arbuscular mycorrhizal) fungal hyphae, on the ability of plants to uptake and accumulate radiocaesium through the roots was investigated. Three plant species were used: pea, soybean and oats. Experimental data suggested that, as roots explore new volumes of soil during growth, the plant will continue to accumulate this radionuclide at high rates in the early stages of ontogenesis. If plants are established on a contaminated site they may not be able to remove all of this radionuclide from soil, especially if a substantial amount of the radionuclide has been leached below the root zone which is commonly 30-40 cm in depth. Laboratory experiments indicate that certain plants may be able to remove radionuclides, especially 137 Cs, from soil over a time period of 5-20 years.

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“…The transfer factor (TF) is the ratio between the activity concentration in the whole plant (Bq kg −1 dry mass of a plant) and the activity concentration in soil (Bq kg −1 dry mass of soil) and is used as parameter describing the accumulation of radionuclides [15]. Transfer factors were calculated as ratios of the activity concentration in the pooled plant samples (about 50 plants) and the mean activity concentration in the soils.…”

Section: Transfer Factorsmentioning

confidence: 99%

Radioecology studies in the vicinity of a closed uranium mine

Smodiš

Štrok

Černe

2012

EPJ Web of Conferences

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Although the influential area of the former uranium mine ať Zirovski vrh, Slovenia has been under continuous radiological monitoring, more detailed radioecology studies, focused on assessing mobility and bioavailability of deposited radionuclides, were initiated about five years ago. The mobility of 238 U, 234 U, 230 Th and 226 Ra was studied applying two sequential extraction protocols. The results revealed that both sequential extraction protocols are not comparable as the data obtained are protocol-and radionuclide-dependent. It was found that the most mobile ones were uranium isotopes, followed by 226 Ra and 230 Th. In addition, uptake of particular radionuclides by the wetland plants (Molinia arundinacea, Juncus effusus and Caltha palustris) grown in soils contaminated with seepage waters from the tailings was studied. The plants contained higher levels of 238 U, 226 Ra and 230 Th compared to the plants from the control site. Activity concentration of 226 Ra was the highest for all three plant species. Activity concentration of natural radionuclides in milk collected from the area ofŽirovski vrh was comparable to the reference location, except for uranium where the content was higher. The combined annual effective dose for adults consuming milk from theŽirovski vrh area is 13 ± 2 μSv yr −1 . *

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Plant uptake of radionuclides in lysimeter experiments

Cited by 74 publications

References 12 publications

Geoquímica de radionuclídeos naturais em solos de áreas circunvizinhas a uma Unidade de Mineração e Atividade de Urânio

Geoquímica de radionuclídeos naturais em solos de áreas circunvizinhas a uma Unidade de Mineração e Atividade de Urânio

Availability of radiocasium in plant from soil: facts, mechanism and modelling

Radioecology studies in the vicinity of a closed uranium mine

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