Deposition of Strontium-90 and its Content in Vegetation and in Human Diet in the United Kingdom

Rs, Russell

doi:10.1038/182834a0

Cited by 40 publications

(12 citation statements)

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“…Particles < 50A in diameter are more readily trapped on plant foliage than are particles of larger diameter and these smaller particles are (32) The radionuclides contained in fallout particles may enter plant tissue via roat absorption (29,30) (27,34) (33) , foliar absorption , or stem-base absorption Because these processes are relatively slow or because the amount of activity involved is small in relation to the activity of external deposits, the actual assimilation of radionuclides by plants is of little significance in -regard to the early food-chain kinetics in a fallout-contaminated ecosys tem.…”

Section: Disclaimermentioning

confidence: 99%

Food-Chain Relationships of Radiostrontium in the Sedan Fallout Field

Martin¹,

Turner²

1965

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Section: Disclaimermentioning

confidence: 99%

Food-Chain Relationships of Radiostrontium in the Sedan Fallout Field

Martin¹,

Turner²

1965

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“…137 Cs과 90 Sr의 평균비(Table 2)는 9.67로, 이는 일반적 인 초기 방사성낙진에 의한 농도비(약1.7)보다 훨씬 큰 값이다 [7]. 그 이유로는 토양에 존재하고 있는 안정 strontium과 두 핵종의 토양교질입자에 대한 흡착 용이 성 차이에 의해 시간경과에 따라 2가 이온인 strontium 은 토양의 깊은 층으로 많은 이동을 하는 반면, 1가 이 온인 cesium은 대부분이 여전히 표층토양에 존재하기 때문에 비는 점점 더 큰 값을 가지게 되는 것이다 [4,8,9].…”

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Distributions of <sup>137</sup>Cs and <sup>90</sup>Sr in the Soil of Uljin, South Korea

Song¹,

Kim²,

Maeng³

et al. 2016

J Radiat Prot Res

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Background: For the purpose of baseline data collection and enhancement of environmental monitoring the distribution studies of 137 Cs and 90 Sr in the soil of Uljin province was performed and the relation between surface soil activities and soil properties (pH, TOC and median of the surface soil) was analyzed. Materials and Methods: For 14 spots within 10 km from the NPP surface soil samples were collected and soils for depth profile were sampled for 3 spots in April 2011. Using γ-ray spectrometry with HPGe detector, the concentrations of 137 Cs were determined and the concentrations of 90 Sr were measured by counting β-activity of 90 Y (in equilibrium with 90 Sr) in a gas flow proportional counter. Results and Discussion: The concentration ranges of 137 Cs and 90 Sr were <0.479-39.6 Bq‧ (kg-dry) -1 (avg. 7.51 Bq‧(kg-dry) -1 ) and 0.209-1.85 Bq‧(kg-dry) -1 (avg. 0.74 Bq‧(kg-dry) -1 ) which were similar to the reported values from other regions in Korea. The activity ratio of 137 Cs to 90 Sr in surface soils was around 9.67, which is much bigger than the initial value of 1.75 for worldwide fallouts because of faster downward movement of 90 Sr after fallout than that of 137 Cs. For depth profile studies soils were collected down to 40 cm depth for the locations of Deokgu, Hujeong and Maehwa. The 137 Cs concentration distribution of the first two showed maximum values at top soils and decreased rapidly in exponential manner, while 90 Sr showed two local maximum values for soils near top and about 30 cm depth. Through linear fittings between the 137 Cs and 90 Sr concentrations of surface soil and pH, TOC and median of the surface soil, the only probable relationship obtained was between 137 Cs and TOC (determination coefficient R 2 =0.6). Conclusion: The concentration ranges of 137 Cs and 90 Sr in Uljin were similar to the reported values from other regions in Korea. The only probable relationship obtained between activities and soil properties was between 137 Cs and TOC.

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“…In a field sitnation malin factors mlight influeicne differenitial uptake of ra(lioelements, especially type and( chellmical coIllloneiits of soil (26,32), rainfall (24), agricultural lractice (28,29,30) and( kind of planit (14,20).…”

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confidence: 99%