Characteristics of cumulative deposition of fallout Pu in environmental samples collected in South Korea

Lee, M.H.; Lee, C.W.

doi:10.1016/s1569-4860(01)80022-x

Cited by 7 publications

(9 citation statements)

References 27 publications

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“…Additionally, the higher organic content in soil is usually associated with higher vegetation coverage, which can limit the loss of plutonium through suppressing the soil erosion (Zhang et al, 2021). The similar retention function of soil organic matter content on the concentration of fallout Pu in surface soils has also been reported in other locations (Lee and Lee, 2001;Komosa, 1999;Zhang et al, 2021).…”

Section: Distribution Ofmentioning

confidence: 57%

“…Therefore, the human activity was manifested as a key factor in the distribution of plutonium. Such influence has also been observed in Northern Xinjiang (Zhao et al, 2020), northeast China (Xu et al, 2013), the Loess Plateau , South Korea (Lee and Lee, 2001).…”

Section: Distribution Ofmentioning

confidence: 64%

“…Spatial distribution of 239,240 Pu concentrations in the studied area. physical significance on the concerned plutonium concentrations (Zhao et al, 2020;Zhang et al, 2021;Lee and Lee, 2001). A value of 1 was assigned to the sample collected at sites disturbed by human activities, and 2 for the samples from sites without human disturbance.…”

Section: Distribution Ofmentioning

confidence: 99%

“…(1) LOI The organic content can directly influence the retention of deposited plutonium in the soil. Although plutonium could also be associated to oxides and minerals in the soil, over 50% of plutonium in the soil was observed as organic matter associated form (Lee and Lee, 2001), and the association of plutonium to macromolecules can significantly reduce the migration of plutonium in the environment (Ni et al, 2018;Bu et al, 2014). Additionally, the higher organic content in soil is usually associated with higher vegetation coverage, which can limit the loss of plutonium through suppressing the soil erosion (Zhang et al, 2021).…”

Section: Distribution Ofmentioning

confidence: 99%

See 3 more Smart Citations

Plutonium isotopes in the Qinghai-Tibet Plateau: Sources, distribution, and their environmental behaviors

Zhao

Hou

Zhao

et al. 2022

Environmental Pollution

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Section: Distribution Ofmentioning

confidence: 57%

Section: Distribution Ofmentioning

confidence: 64%

Section: Distribution Ofmentioning

confidence: 99%

Section: Distribution Ofmentioning

confidence: 99%

See 2 more Smart Citations

Plutonium isotopes in the Qinghai-Tibet Plateau: Sources, distribution, and their environmental behaviors

Zhao

Hou

Zhao

et al. 2022

Environmental Pollution

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“…23,24,25,26,27,28,29 Among the rooted plants, brome and desert globemallow species tended to accumulate higher Pu concentrations than the slower growing creosote bush, fourwing saltbush and sagebrush. Species are listed by location in Table 4 to account for site specific Pu concentrations.…”

Section: Radionuclide and Elemental Levels In Vegetationmentioning

confidence: 99%

Plutonium uptake and behavior in vegetation of the desert southwest: A preliminary assessment

et al. 2011

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Eight species of desert vegetation and associated soils were collected from the Nevada National Security Site (N2S2) and analyzed for 238Pu and 239 + 240Pu concentrations. Amongst the plant species sampled were: atmospheric elemental accumulators (moss and lichen), the very slow growing, long-lived creosote bush and the rapidly growing, short-lived cheatgrass brome. The diversity of growth strategies provided insight into the geochemical behavior and bio-availability of Pu at the N2S2. The highest concentrations of Pu were measured in the onion moss (24.27 Bq kg-1 238Pu and 52.78 Bq kg-1 239 + 240Pu) followed by the rimmed navel lichen (8.18 Bq kg-1 and 18.4 Bq kg-1 respectively), pointing to the importance of eolian transport of Pu. Brome and desert globemallow accumulated between 3 and 9 times higher concentrations of Pu than creosote and sage brush species. These results support the importance of species specific elemental accumulation strategies rather than exposure duration as the dominant variable influencing Pu concentrations in these plants. Total vegetation elemental concentrations of Ce, Fe, Al, Sm and others were also analyzed. Strong correlations were observed between Fe and Pu. This supports the conclusion that Pu was accumulated as a consequence of the active accumulation of Fe and other plant required nutrients. Cerium and Pu are considered to be chemical analogs. Strong correlations observed in plants support the conclusion that these elements displayed similar geochemical behavior in the environment as it related to the biochemical uptake process of vegetation. Soils were also sampled in association with vegetation samples. This allowed for the calculation of a concentration ratio (CR). The CR values for Pu in plants were highly influenced by the heterogeneity of Pu distribution among sites. Results from the naturally occurring elements of concern were more evenly distributed between sample sites. This allowed for the development of a pattern of plant species that accumulated Ce, Sm, Fe and Al. The highest accumulators of these elements were onion moss, lichen flowed by brome. The lowest accumulators were creosote bush and fourwing saltbush. This ranked order corresponds to plant accumulations of Pu.

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Quantitative assessment of the spatial distribution of 239+240Pu inventory derived from global fallout in soils from Asia and Europe

et al. 2022

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Due to the atmospheric nuclear weapon tests carried out, terrestrial environments have been extensively contaminated by global fallout of plutonium (Pu) worldwide. The 249+240 Pu inventories in soil profiles from undisturbed and flat forest or grasslands (reference sites) mainly from Europe and Asia are considered as important background for evaluating soil erosion. Thus, we conducted a literature survey over an area extending from 2.6°W to 148.9°E and from 53.2°S to 76.6°N, with the purpose of analyzing the spatial distribution of 239+240 Pu inventories and possible controlling factors. The aim of this work was to derive an empirical model of 239+240 Pu inventory based on currently available 239+240 Pu data, precipitation and latitude. The results show that, in general, the latitudinal distribution of 239+240 Pu inventory was consistent with the UNSCEAR reports. However, the 239+240 Pu inventories are higher than the UNSCEAR data, especially in the Northern Hemisphere. In addition, close relationships (at the 0.01 significance level) were identified between 239+240 Pu inventories and annual precipitation and latitude. An empirical formula was therefore developed to estimate 239+240 Pu inventories in soils based on latitude and precipitation data. However, future research may require more data of measured 239+240 Pu inventories in soil profiles that can be used to compare, validate and improve upon the accuracy of the inferred empirical equation.

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Characteristics of cumulative deposition of fallout Pu in environmental samples collected in South Korea

Cited by 7 publications

References 27 publications

Plutonium isotopes in the Qinghai-Tibet Plateau: Sources, distribution, and their environmental behaviors

Plutonium isotopes in the Qinghai-Tibet Plateau: Sources, distribution, and their environmental behaviors

Plutonium uptake and behavior in vegetation of the desert southwest: A preliminary assessment

Quantitative assessment of the spatial distribution of 239+240Pu inventory derived from global fallout in soils from Asia and Europe

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