Substratum influences uptake of radium-226 by plants

Girault, Frédéric; Perrier, Frédéric; Ourcival, Jean‐Marc; Ferry, Roxane; Bourges, François; Didon‐Lescot, Jean‐François

doi:10.1016/j.scitotenv.2020.142655

Cited by 7 publications

(6 citation statements)

References 106 publications

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“…S4 ). This value is consistent with the mean EC Ra value for soils 60 , 61 (≈ 7 Bq kg −1 ; n = 2070). EC Ra values for volcanic rocks from samples collected inside and around the Furnas caldera, i.e.…”

Section: Resultssupporting

confidence: 88%

Radon signature of CO2 flux constrains the depth of degassing: Furnas volcano (Azores, Portugal) versus Syabru-Bensi (Nepal Himalayas)

Girault

Viveiros

Silva

et al. 2022

Sci Rep

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Substantial terrestrial gas emissions, such as carbon dioxide (CO2), are associated with active volcanoes and hydrothermal systems. However, while fundamental for the prediction of future activity, it remains difficult so far to determine the depth of the gas sources. Here we show how the combined measurement of CO2 and radon-222 fluxes at the surface constrains the depth of degassing at two hydrothermal systems in geodynamically active contexts: Furnas Lake Fumarolic Field (FLFF, Azores, Portugal) with mantellic and volcano-magmatic CO2, and Syabru-Bensi Hydrothermal System (SBHS, Central Nepal) with metamorphic CO2. At both sites, radon fluxes reach exceptionally high values (> 10 Bq m−2 s−1) systematically associated with large CO2 fluxes (> 10 kg m−2 day−1). The significant radon‒CO2 fluxes correlation is well reproduced by an advective–diffusive model of radon transport, constrained by a thorough characterisation of radon sources. Estimates of degassing depth, 2580 ± 180 m at FLFF and 380 ± 20 m at SBHS, are compatible with known structures of both systems. Our approach demonstrates that radon‒CO2 coupling is a powerful tool to ascertain gas sources and monitor active sites. The exceptionally high radon discharge from FLFF during quiescence (≈ 9 GBq day−1) suggests significant radon output from volcanoes worldwide, potentially affecting atmosphere ionisation and climate.

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Section: Resultssupporting

confidence: 88%

Radon signature of CO2 flux constrains the depth of degassing: Furnas volcano (Azores, Portugal) versus Syabru-Bensi (Nepal Himalayas)

Girault

Viveiros

Silva

et al. 2022

Sci Rep

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“…Radium is ubiquitous in the environment and can be found in water, rock, soil and vegetation. 226 Ra is a member of the uranium-238 decay series and is an alpha emitter with a half-life of 1600 ± 7 years [ 51 ]. The typical world value for the activity concentration of 226 Ra in soil is given as 35 Bq/kg [ 52 ].…”

Section: Resultsmentioning

confidence: 99%

Do You Know What You Drink? Comparative Research on the Contents of Radioisotopes and Heavy Metals in Different Types of Tea from Various Parts of the World

Grządka,

Bastrzyk,

Orzeł

et al. 2024

Foods

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The aim of this study was to assess the potential health risks of radioactive elements and heavy metals ingested through the consumption of various types of tea imported to the Polish market (black, green, red, oolong and white). The concentrations [Bq/kg] of radionuclides (40K, 137Cs, 226Ra, 210Pb and 228Th) in tea leaves before and after brewing were measured using γ-ray spectrometry with high-purity germanium (HPGe). The concentrations [mg/kg] of the studied elements (Fe, Cr, Cu, Mo, Al, Mn, Ni, P, V, Cd and Pb) were determined using a microwave-induced plasma optical emission spectrometer (MIP-OES). The results presented here will help to expand the database of heavy metals and radioactivity in teas. With regard to the potential health risk, the percentage of leaching of individual elements in different types of tea infusions was determined, and the assessment of the consumption risk was estimated. Since the calculated exposure factors, namely the HQ (Hazard Quotient) and THQ (Target Hazard Quotient), do not exceed critical levels, teas can still be considered health-beneficial products (most of the radionuclides as well as elements remain in the leaves (65–80%) after brewing).

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“…When com par ing ura nium plant-soil con cen tra tion ra tios be tween sites un con tam inated and con tam i nated by ura nium, some dif fer ences for the de cid u ous trees and shrubs leaves were ob served, but were not sig nif i cantly dif fer ent ei ther [5]. Ranges of 226 Ra TF val ues, from the pres ent study, of 0.0026-0.44 at the af fected site and 0.068-0.111 at the back ground site, could be com pared with that ob tained for the tree leaves (Quercus robur, Castanea sativa, Tilia ×europaea, Quercus ilex) col lected ex clu sively at the back ground sites: 0.071-0.231 of gra nitic and meta morphic or i gin and 0.0022-0.137 of cal car e ous and sed i mentary or i gin at sites char ac ter ized as not con tam i nated sandy soils [25].…”

Section: Transfer Factor Vs Soil Ac Tiv Ity Con Cen Tra Tionmentioning

confidence: 88%

“…Op po sitely, in the deeper soil layer with the decrease of coarse soil par ti cles, 222 Rn at oms stayed blocked in the smaller pore spaces of soil which resulted in lower 210 Pb ac tiv ity con cen tra tion in the soil. In the study of Girault et al [25] (and ref er ences therein), there were no sig nif i cant sys tem atic dif ferences of the 222 Rn em a na tion co ef fi cients for soils between dif fer ent soil types (clay, silt, sand, gravel and till) (mean var ied from 0.17 to 0.24) and es pe cially between sands (with a mean 0.242) and even be tween plants that in cluded leaves of mul ti ple broadleaf tree spe cies (range of vari a tion 0.82-0.95). This could lead to the con clu sion that small 210 Pb ac tiv ity con cen tra tion dif fer ences can be ex pected in the leaves of av er age broadleaf trees (if not known to be hyperaccumulator or ex cluder spe cies) grown in soils of dif fer ent tex tures.…”

Section: Ac Tiv Ity Con Cen Tra Tion In Leaves Vs Soil Pa Ram E Tersmentioning

confidence: 96%

“…3 im plied that ac tiv ity con cen tra tions in tree leaves (C leaves ) are a non-lin ear func tion of ac tiv ity con cen trations in the soil (C soil ) of the type: C leaves = a C soil b with pa ram e ter val ues a > 0 and 1 < b < 1. This is a reg u larly ob served power func tion that re flects the non-lin ear ity in the soil to plant trans fer of the es sen tial and non-es sen tial el e ments [11,13,25,27]. To ex trap o late these ob tained re sults, it was ex am ined whether the con cen tra tion in leaves would be zero when the con cen tra tion in the soil is zero.…”

Section: Transfer Factor Val Ues Ver I Fi Ca Tionmentioning

confidence: 99%

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Analysis of 238U, 226Ra, and 210Pb transfer factors from soil to the leaves of broadleaf tree species

Vukašinović

2022

NUCL TECH RAD PROT

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This analysis of 238U, 226Ra and 210Pb transfer factors from the soil to the leaves of different native broadleaf trees at sites previously modified by uranium presence and at the site of background radioactivity levels, was conducted using data from a few available studies from the literature. The broadleaf tree species Quercus ilex, Quercus suber, Eucalyptus camaldulensis, Quercus pyrenaica, Quercus ilex rotundifolia, Populus sp. and Eucalyptus botryoides Sm. at the affected sites and Tilia spp. and Aesculus hippocastanum L. at the back ground site were in cluded in the study regardless of the deciduous or evergreen origins of the leaves. In the papers cited here, data about basic soil parameters: pH, total Ca [gkg-1], sand [%], and silt + clay [%] fractions were also available. All the collected data of activity concentration [Bqkg-1] dry weight in the soil (n=14) which was in the range: 22-6606 for 238U, 38-7700 for 226Ra, and 37-7500 for 210Pb, and the tree leaves in the range: 2.7-137.6 for 238U (n=10), 2.6-134.2 for 226Ra (n=14), and 27-77.2 for 210Pb (n=14), indicated that it was normally distributed after log-transformation. The present study was conducted under the hypothesis that biological differences between the examined broadleaf tree species have a lesser influence on the transfer factors of the investigated radionuclides from soil to tree leaves compared to the impact of the soil parameters and radionuclides activity concentrations in the soil. Consequently, it was examined whether 238U, 226Ra, and 210Pb soil-to-leaves transfer factor values for average broadleaf species could be predicted statistically in the first approximation based on their activity concentration in the soil and at least one basic soil parameter using multiple linear regression.

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Substratum influences uptake of radium-226 by plants

Cited by 7 publications

References 106 publications

Radon signature of CO2 flux constrains the depth of degassing: Furnas volcano (Azores, Portugal) versus Syabru-Bensi (Nepal Himalayas)

Radon signature of CO2 flux constrains the depth of degassing: Furnas volcano (Azores, Portugal) versus Syabru-Bensi (Nepal Himalayas)

Do You Know What You Drink? Comparative Research on the Contents of Radioisotopes and Heavy Metals in Different Types of Tea from Various Parts of the World

Analysis of 238U, 226Ra, and 210Pb transfer factors from soil to the leaves of broadleaf tree species

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