Heterogeneity of soil contamination by 90Sr and its absorption by herbaceous plants in the East Ural Radioactive Trace area

Mikhailovskaya, L. N.; Modorov, M. V.; Pozolotina, V. N.; Антонова, Е. В.

doi:10.1016/j.scitotenv.2018.10.119

Cited by 15 publications

(6 citation statements)

References 14 publications

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“…This aligns with established knowledge on plant nutrient uptake, as reported by Rinaldi et al [13] and Burger and Lichtscheidl [32], who documented efficient Cs/Sr absorption from the soil. While natural soil and water harbor low Cs/Sr levels, posing no visible toxicity threats, elevated concentrations become detrimental to plant growth [3][4][5]. The primary mechanism for this growth inhibition likely involves competitive exclusion.…”

Section: Discussionmentioning

confidence: 99%

“…Long-lived radioisotopes cesium-137 (¹³⁷Cs) and strontium-90 (⁹⁰Sr) pose environmental threats due to their persistence in the biosphere (half-lives > 30 yrs) and potential food chain entry via plant uptake from contaminated soils and water [1][2][3]. While natural levels are innocuous, elevated ¹³⁷Cs and ⁹⁰Sr in the soil can significantly alter plant growth and development [3][4][5]. Cs and Sr compete with their chemical analogs potassium (K) and calcium (Ca) for plant uptake through shared transport mechanisms [1,[6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Cs and Sr compete with their chemical analogs potassium (K) and calcium (Ca) for plant uptake through shared transport mechanisms [1,[6][7][8][9]. While increased soil K and Ca generally decrease Cs and Sr uptake, respectively [5,[10][11][12][13][14], the relationship is complex, with some studies reporting variable effects of K concentration on Cs uptake [15,16]. Therefore, Cs and Sr accumulation likely depends on plant species and environmental conditions [5,17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Growth Responses of Holcus lanatus L. (Velvet Grass) in Soils Contaminated with Cesium or Strontium

Khan,

Alam,

Begum

et al. 2024

Soil Systems

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Radiocesium (r-Cs) and radiostrontium (r-Sr) released from nuclear accidents (e.g., Chornobyl, Fukushima) and routine operations (reactors, reprocessing) pose environmental and health concerns. Their primary pathway to humans is through plant uptake and subsequent bioaccumulation within the food chain. While soil amendments with potassium (K) and calcium (Ca) are known to mitigate r-Cs and r-Sr uptake, respectively, the impact on plant growth remains unclear. This study investigates the effects of Cs and Sr on the growth of Holcus lanatus L. seedlings under hydroponic and soil conditions with varying Cs and Sr concentrations. Stable isotopes of Cs and Sr served as non-radioactive analogs. Seedling growth was assessed across a range of Cs and Sr concentrations (≤1 and ≥4 mg L⁻¹). The impact of the addition of K and Ca on Cs/Sr uptake in amended soils was also evaluated. Additionally, this study examined how Cs and Sr amendments affected the influx rates of other nutrients in H. lanatus. Higher Cs and Sr concentrations (≥4 mg L⁻¹) significantly inhibited seedling growth, while lower concentrations had no effect. Notably, H. lanatus exhibited moderate Cs tolerance and strong Sr tolerance. Furthermore, K and Ca supplementation in Cs/Sr-amended soils demonstrably reduced plant uptake of these elements. This study also observed alterations in the uptake rates of other nutrients within H. lanatus due to Cs/Sr addition. This study suggests that H. lanatus exhibits moderate tolerance to Cs and Sr contamination, potentially making it suitable for revegetation efforts in contaminated grasslands. Additionally, K and Ca amendments show promise as a strategy to mitigate plant uptake of these radioisotopes further. These findings contribute to the development of safer revitalization strategies for areas impacted by nuclear accidents.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Growth Responses of Holcus lanatus L. (Velvet Grass) in Soils Contaminated with Cesium or Strontium

Khan,

Alam,

Begum

et al. 2024

Soil Systems

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“…Despite the fact that more than 60 years (about two half-lives of 90 Sr) have passed since the radiation accident, a large part of the EURT territory is still heavily contaminated. For example, in 2001-2012 the local concentration of 90 Sr in a 10 cm layer of the soil reached 20 Bq g -1 (Molchanova et al 2009;Molchanova et al 2014;Mikhailovskaya et al 2019). Many studies of radiation effects in EURT rodents have already been published (Ilyenko 1974;Gileva 2002;Orekhova and Modorov 2017;Orekhova et al 2019) and continue to be carried out.…”

Section: Dosimetry Of Rodents Exposed At the East Urals Radioactive T...mentioning

confidence: 99%

Bone marrow dosimetry for mice: exposure from bone-seeking 89,90Sr

Shishkina

Shuiskaya

Sharagin

2022

Radiat Environ Biophys

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Studies of radiobiological effects in murine rodents exposed to internal radiation in the wild or in laboratory experiments require a dosimetric support. The main problem of bone marrow (BM) dosimetry for boneseeking β-emitters is dosimetric modeling due to the fact that the bone is a heterogeneous structure with complex microarchitecture. To date, there are several approaches to calculating the absorbed dose in BM, which mostly use rough geometric approximations. Recently, in the framework of studies of people exposed to 90 Sr in the Urals, a new approach (SPSD) has been developed. The aim of current study was to pilot test the possibility of extension of the SPSD-approach elaborated for humans to mice. The computational phantoms of femur bones of laboratory animals (C57BL/6, C57BL/6J, BALB/c, BALB/cJ) aged 5-8 weeks (growing) and >8 weeks (adults) were created. The dose factors to convert the 89,90 Sr activity concentrations in a bone tissue into units of the dose rate absorbed in the bone marrow were estimated as follows: DFSr-90(BMTBV+CBV) is equal to 1.75±0.42 and 2.57±0.93 (μGy day -1 ) per (Bq g -1 ) for growing and adults, respectively; DFSr-89(BMTBV+CBV) is equal to 1.08±0.27 and 1.66±0.67 (μGy day -1 ) per (Bq g -1 ) for growing and adults, respectively. These results are about 2.5 times lower than skeleton-average DF, calculated assuming the homogenous bone, where source and target coincide. The study demonstrates the possibility of application of the SPSD-approach elaborated for humans to non-human mammals.

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“…There are increasing concerns over the exposure of the human population to enhanced ionizing radiations emanating from natural and anthropogenic sources [1][2][3][4][5][6][7][8]. In the terrestrial environment, humans are mainly exposed to ionizing radiations through medical applications [9], accidents or emergency occurrence at nuclear power plants (NPPs), tests of nuclear weapons and radiotoxic radionuclides from refurbished nuclear plants [8].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Radiological Hazard Indices from Exposures to Background Ionizing Radiation Measurements in South-South Nigeria

Ekong¹,

Akpa²,

Umaru³

et al. 2019

IJEMA

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Radioactivity in the environment from sources of natural and human activities resulting in planned, emergency and existing exposure to human population, environment and other biota has led to growing apprehensions in Nigeria and the world. The existing exposure situations mainly from natural radionuclides, present in the earth crust from creation emits background ionizing radiation leading to gamma dose exposures. The objective of this study was to assess the background ionizing radiation and associated radiological hazard indices in Itu, Nigeria located at 5010'0" N 7059'0" E, and establish an eco-radiological baseline data prior to the construction of any nuclear fission reaction facility in the area. A systematic random method of measurement was employed within demarcated monitoring zones of entire geological map of Itu, Nigeria. The global positioning system finder (GARMIN Etrex 10) was used for data point location, while RDS-31S/R Multipurpose survey meter was used for dose rate measurement. The background ionizing radiation measurement obtained ranged from 0.041 ± 0.002-0.045 ± 0.002 µSv/hr with overall mean of 0.042 ± 002 µSv/hr, which was lower than the world mean of 0.2 µSv/hr. Radiological hazard indices arising from the background ionizing radiation measurement were also evaluated. The mean estimated Gamma Dose Rate was 9.312 nGy/hr, the terrestrial outdoor Annual Effective Dose Rate arising from gamma was 6.83 mSv/yr, that of indoor was 21.85 mSv/yr and Excess Life Cancer Risk was 0.05 × 10-3. The mean evaluated radiological hazard indices were found to be below admissible limits, and thus poses no significant radiological health threat to the populace. Therefore, the assessment demonstrates that there is no elevated level of dose rate, which is makes it safe for human habitation, but care should be taken to avoid increase radiation level from human activities. It is recommended that constant radiological monitoring be encourage, and the data considered as radiological baseline in Itu, Nigeria.

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Heterogeneity of soil contamination by 90Sr and its absorption by herbaceous plants in the East Ural Radioactive Trace area

Cited by 15 publications

References 14 publications

Growth Responses of Holcus lanatus L. (Velvet Grass) in Soils Contaminated with Cesium or Strontium

Growth Responses of Holcus lanatus L. (Velvet Grass) in Soils Contaminated with Cesium or Strontium

Bone marrow dosimetry for mice: exposure from bone-seeking 89,90Sr

Assessment of Radiological Hazard Indices from Exposures to Background Ionizing Radiation Measurements in South-South Nigeria

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