Soil-to-plant halogens transfer studies 2. Root uptake of radiochlorine by plants

Kashparov, V.; Colle, C.; Zvarich, S.I.; Yoschenko, Vasyl; Levchuk, S.; Lundin, S.M.

doi:10.1016/j.jenvrad.2004.07.001

Cited by 36 publications

(33 citation statements)

References 9 publications

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“…A field study on agriculture crop uptake of 36 Cl during three vegetation seasons showed a retention of 36 Cl in the soil system based on observations that 36 Cl is taken up by vegetation through root uptake. 27 No mineral sorption was observed. Kashparov et al 28 showed that 36 Cl taken up by the biota is released quickly from dry vegetation without decomposition.…”

Section: ■ Introductionmentioning

confidence: 95%

“…Extensive Cl − uptake by plants and high betweenspecies differences in uptake rates have been confirmed for various agricultural plants (e.g., radish, lettuce, bean, and wheat). 27 The soil-plant concentration ratio (CR) varied greatly between studied crops with lowest for radish and highest for wheat straw. Based on previous literature, a significant uptake in the plant biota is clear, however the information regarding trees and especially canopy exchange is much more scattered.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

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Experimental Evidence of Large Changes in Terrestrial Chlorine Cycling Following Altered Tree Species Composition

Montelius

Thiry

Marang³

et al. 2015

Environ. Sci. Technol.

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Organochlorine molecules (Cl org ) are surprisingly abundant in soils and frequently exceed chloride (Cl − ) levels. Despite the widespread abundance of Cl org and the common ability of microorganisms to produce Cl org , we lack fundamental knowledge about how overall chlorine cycling is regulated in forested ecosystems. Here we present data from a long-term reforestation experiment where native forest was cleared and replaced with five different tree species. Our results show that the abundance and residence times of Cl − and Cl org after 30 years were highly dependent on which tree species were planted on the nearby plots. Average Cl − and Cl org content in soil humus were higher, at experimental plots with coniferous trees than in those with deciduous trees. Plots with Norway spruce had the highest net accumulation of Cl − and Cl org over the experiment period, and showed a 10 and 4 times higher Cl − and Cl org storage (kg ha −1 ) in the biomass, respectively, and 7 and 9 times higher storage of Cl − and Cl org in the soil humus layer, compared to plots with oak. The results can explain why local soil chlorine levels are frequently independent of atmospheric deposition, and provide opportunities for improved modeling of chlorine distribution and cycling in terrestrial ecosystems.

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Section: ■ Introductionmentioning

confidence: 95%

Section: Environmental Science and Technologymentioning

confidence: 99%

Experimental Evidence of Large Changes in Terrestrial Chlorine Cycling Following Altered Tree Species Composition

Montelius

Thiry

Marang³

et al. 2015

Environ. Sci. Technol.

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“…Se tiene por ejemplo que el Cl -tiene un alto TF, debido a su flujo en la planta muestra alta correlación con el flujo hídrico del xilema, se ha calculado un valor TF= 785 para el Cl -en Lolium perene (Ashworth y Shaw, 2006). En contraste los valores de TF para yodo suelen ser muy bajos: 0.00034 para pastos (IAEA, 1994), 0.0005-0.02 para cereales en Austria (Shinonaga et al, 2001), 0.024-0.19 para maíz, betabel y calabaza (Sheppard et al, 1993) y 0.01-0.03 para rábanos y lechuga (Kashparov et al, 2005).…”

Section: (Figura 2)unclassified

“…For example Cl -has a high TF, due to its flow in the plant shows high correlation with xylem water flow, it has been calculated a TF = 785 value for Cl -in Lolium perene (Ashworth and Shaw, 2006). In contrast TF values for iodine are usually very low: 0.00034 for forage (IAEA, 1994), 0.0005-.02 for cereals in Austria (Shinonaga et al, 2001), 0.024-0.19 for corn, beets and pumpkin (Sheppard et al, 1993) and 0.01-0.03 for radishes and lettuce (Kashparov et al, 2005).…”

Section: Conclusionesmentioning

confidence: 99%

Biofortificación con yodo en plantas para consumo humano

Leija-Martínez

Benavides-Mendoza

Rocha-Estrada

et al. 2017

Remexca

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ResumenEn el presente trabajo se describe la problemática de salud debido al consumo insuficiente del yodo, así como las alternativas que han sido empleadas para mitigar este problema global, tanto las tradicionales como la yodatización de sal de mesa hasta las nuevas tendencias de biofortificación con yodo en las principales plantas de consumo humano. Se incluyen los mecanismos de absorción, volatilización y transporte del yodo en las plantas, distinguiendo entre especies marinas y terrestres. Se mencionan asimismo los resultados obtenidos en algunos estudios de biofortificación, citando las diferentes formas de aplicación y las diferencias obtenidas entre los sistemas de cultivo en suelo y sin suelo.Palabras clave: absorción de yodo, desorden por deficiencia de yodo, fortificación con yodo, haloperoxidasas, yodatización. IntroducciónEl consumo insuficiente de los micronutrientes través de los alimentos causa una malnutrición mineral en humanos. Hasta ahora se han determinado 11 elementos traza que son AbstractThis paper describe health problems due to insufficient iodine intake, thus the alternatives that have been used to alleviate this global problem, both traditional and iodization of table salt to new trends of iodine biofortification in the main plants for human consumption. The mechanisms of absorption, volatilization and transport of iodine in plants, distinguishing between marine and terrestrial species are included. The results of some biofortification studies are also mentioned, citing the different forms of application and the differences obtained between cropping systems in soil and soilless.

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“…As the objective of these experiments is to obtain "pure" translocation factors, we shall avoid soil contamination from contamination stage until harvest because of the importance of root transfer factors for chloride [39] and for selenite [40], but also rain washing of leaf surfaces during cultural cycle. That's why soil protection and rain protection features respectively under and above canopy will be built with an adapted design permitting recovery of rain amounts for irrigation and allowing daylight spectrum reaching the canopy (cf.…”

Section: Prospects: Protocol Developed For Next Experimental Studiesmentioning

confidence: 99%

Role and uncertainty of foliar transfer in radiological impact assessments: State of the art and future actions

et al. 2009

Self Cite

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Abstract. Sensitivity analyses have shown major role of foliar transfer for many radionuclides in the context of radiological impact assessments. A review of the published literature about foliar transfer focusing on translocation factors was carried out in order to constitute an updated database on one hand and to use the appropriate existing values of translocation parameters for modeling on the other. Translocation describes the distribution of radionuclides within the plant after foliar deposition and radionuclide absorption onto the surface of leaves. It mainly depends on elements and the plant growth stage. The collected data was derived from both in-field and greenhouse experiments. It was analysed to select those coming from a contamination simulating sprinkling irrigation or rain. This work not only allowed us to carry out a diagnosis on the values themselves but also enabled us to ascertain missing data needs. In order to compensate for the lack of data on important radionuclides concerning radioactive waste ( 129 I, 36 Cl, 79 Se), experimental studies have been launched. CONTEXT AND DEFINITIONTransfer of radionuclides to plants by sprinkling irrigation with contaminated water in standard agricultural conditions is usually modelled for radiological impact assessments of radioactive waste disposals. Ingestion exposures from irrigated agricultural land are often a few times higher than those of drinking water. The deposition of radionuclides on vegetation and soil represents the starting point for their transfer in the terrestrial environment and in food chains. Interception is the second parameter entering the model and is defined as the fraction of a radionuclide deposited by wet deposition that is initially retained by the vegetation. Although the activity retained is subsequently removed by weathering to the soil and, the fraction that is initially intercepted is a very important quantity in all radioecological models. This is because direct deposition may cause relatively high activity concentrations in feed and foods. Once deposited on vegetation, radionuclides are lost from plants due to removal by wind and rain, either through leaching or by cuticular abrasion. Translocation describes the systemic transport of radionuclides in the plant subsequent to foliar uptake. Translocation has no or very little influence on the long-term-fate of radioactivity in the environment, since it describes only the distribution of radionuclides within the plant subsequent to foliar deposition and absorption by the leaves. However, for estimating radionuclide concentrations in foods and for the assessment of doses to man, the systemic transport of radionuclides is a key issue. It is especially important for plants from which only specific parts are used as food or feed, such as cereals and potatoes. For plants that are used whole, such as leafy vegetables or maize silage, translocation is relevant only in that it may reduce the amount of activity that is lost by weathering processes.Translocation is the phenomenon le...

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Soil-to-plant halogens transfer studies 2. Root uptake of radiochlorine by plants

Cited by 36 publications

References 9 publications

Experimental Evidence of Large Changes in Terrestrial Chlorine Cycling Following Altered Tree Species Composition

Experimental Evidence of Large Changes in Terrestrial Chlorine Cycling Following Altered Tree Species Composition

Biofortificación con yodo en plantas para consumo humano

Role and uncertainty of foliar transfer in radiological impact assessments: State of the art and future actions

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