The level, distribution and source of artificial radionuclides in surface soil from Inner Mongolia, China

Dang, Hongyue; Yi, Xiaowei; Hai-tao, Zhang; Lin, Jianfeng; Zhang, Weichao; Zhai, Shaojing; Zhang, Jiamei; Bai, Tao; Zhang, Xiaolin; Liang, Jianfeng; Wang, Wei

doi:10.1016/j.jenvrad.2021.106614

Cited by 14 publications

(9 citation statements)

References 43 publications

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“…The 137 Cs inventories in these sites were 2293.1, 3152.2, and 1321.6 Bq/m 2 , respectively. The 239+240 Pu inventories at 40–50°N ranged from 7.3 to 546 Bq/m 2 with an average of 185.2 Bq/m 2 , ,,,, and our study area was within 40–50°N. The inventories of 137 Cs in the soil or sediment ranged from 422.0 to 4592.0 Bq/m 2 at 40–50°N. ,,,, Therefore, the 239+240 Pu and 137 Cs inventories in the Lao-Ye-Ling Mountain were within the range of those at a similar latitude.…”

Section: Resultssupporting

confidence: 48%

“…The activities of 239+240 Pu and 137 Cs in Inner Mongolia, China, were 0.052 to 1.260 mBq/g and 0.26 to 28.3 mBq/g, respectively . In grassland soils of S14007 (45°49′12″N, 119°03′00″E), the activities of 239+240 Pu and 137 Cs were 1.190 mBq/g and 28.3 mBq/g, respectively . The activities of 239.240 Pu in the area (40–47°N, 127–130°E) ranged from 0.002 to 4.820 mBq/g .…”

Section: Resultsmentioning

confidence: 99%

“…For example, the average values of the 240 Pu/ 239 Pu atomic ratio are 0.178 ± 0.019 (for 0–30°N) and 0.180 ± 0.014 (for 30–71°N) for releases from the global fallout. , The 240 Pu/ 239 Pu atomic ratio values of the Chernobyl accident and the Fukushima nuclear accident are found in the range of 0.38–0.41 and 0.30–0.33, respectively. − In addition, the 240 Pu/ 239 Pu atomic ratios for release from weapons-grade (0.007–0.01) are lower than those from nuclear power plants (0.23–0.67) . Furthermore, the 137 Cs/ 239+240 Pu activity ratio has also been used as an indicator for 239+240 Pu source identification but cannot be used for isotopic source tracing because the deep 239+240 Pu and 137 Cs are disturbed by different factors . In this paper, the 240 Pu/ 239 Pu atomic ratios were used as a fingerprint to identify the source of 239+240 Pu in the Lao-Ye-Ling Mountain.…”

Section: Introductionmentioning

confidence: 99%

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Sequential Extraction of ^239+240Pu and the Vertical Distribution of ^239+240Pu, ¹³⁷Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil

Guan

Wang

Jing

et al. 2022

ACS Earth Space Chem.

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To establish a 239+240 Pu, 137 Cs, and heavy metal reference soil site in Northeast China, three grassland soil cores were collected from the Lao-Ye-Ling Mountain, which is a branch of the Chang-Bai Mountains. The activities were in the range of 0.041−2.752 mBq/g for 239+240 Pu and in the range of 0.2−57.6 mBq/g for 137 Cs. The 240 Pu/ 239 Pu atomic ratios were 0.161−0.186, showing that 239+240 Pu in the study area originated from the global fallout. Also, 239+240 Pu, 137 Cs, and excess 210 Pb were enriched in the surface soil. The convective−dispersion equation model provided the lower apparent dispersion coefficients (D) and apparent convection velocities (v) for both 239+240 Pu and 137 Cs. The soil erosion rate in this study area was estimated by an erosion model, which was lower than that in the other area of Northeast China. 239+240 Pu in the different soil fractions was analyzed by a sequential extraction method, and the result showed that 239+240 Pu was mainly adsorbed by Fe/Mn oxides and their associated organic matter (NOM Fe/Mn-oxides fraction). Except for Fe, all other heavy metals from the anthropogenic source were enriched in the surface soil. The pollution level of heavy metals in this study area was lower. In general, the alpine grassland soil of the Lao-Ye-Ling Mountain can be used as a reference soil site to study environmental pollution and soil erosion and provided some reference baselines for future multidisciplinary studies in Northeast Asia.

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Section: Resultssupporting

confidence: 48%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sequential Extraction of ^239+240Pu and the Vertical Distribution of ^239+240Pu, ¹³⁷Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil

Guan

Wang

Jing

et al. 2022

ACS Earth Space Chem.

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“…Black dashed line—corresponding trends. The solid black line corresponds to global fallout 38 – 41 . …”

Section: Resultsmentioning

confidence: 99%

“…A recent paper 38 gives a global fallout ratio of 241 Am/ 239+240 Pu = 0.37, as recalculated for 2018. The 137 Cs/ 239+240 Pu ratio was determined in several papers 39 , 40 .…”

Section: Resultsmentioning

confidence: 99%

Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers

Miroshnikov

Флинт

Asadulin

et al. 2021

Sci Rep

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In recent years, cryoconite has received growing attention from a radioecological point of view, since several studies have shown that this material is extremely efficient in accumulating natural and anthropogenic radionuclides. The Novaya Zemlya Archipelago (Russian Arctic) hosts the second largest glacial system in the Arctic. From 1957 to 1962, numerous atmospheric nuclear explosions were conducted at Novaya Zemlya, but to date, very little is known about the radioecology of its ice cap. Analysis of radionuclides and other chemical elements in cryoconite holes on Nalli Glacier reveals the presence of two main zones at different altitudes that present different radiological features. The first zone is 130–210 m above sea level (a.s.l.), has low radioactivity, high concentrations of lithophile elements and a chalcophile content close to that of upper continental crust clarkes. The second zone (220–370 m a.s.l.) is characterized by high activity levels of radionuclides and “inversion” of geochemical behaviour with lower concentrations of lithophiles and higher chalcophiles. In the upper part of this zone (350–370 m a.s.l.), 137Cs activity reaches the record levels for Arctic cryoconite (5700–8100 Bq/kg). High levels of Sn, Sb, Bi and Ag, significantly exceeding those of upper continental crust clarkes, also appear here. We suggest that a buried layer of contaminated ice that formed during atmospheric nuclear tests serves as a local secondary source of radionuclide contamination. Its melting is responsible for the formation of this zone.

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Plutonium isotopes in the Qinling Mountains of China

Guan,

Hua,

Wang

et al. 2023

J Radioanal Nucl Chem

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The level, distribution and source of artificial radionuclides in surface soil from Inner Mongolia, China

Cited by 14 publications

References 43 publications

Sequential Extraction of ^239+240Pu and the Vertical Distribution of ^239+240Pu, ¹³⁷Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil

Sequential Extraction of ^239+240Pu and the Vertical Distribution of ^239+240Pu, ¹³⁷Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil

Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers

Plutonium isotopes in the Qinling Mountains of China

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The level, distribution and source of artificial radionuclides in surface soil from Inner Mongolia, China

Cited by 14 publications

References 43 publications

Sequential Extraction of 239+240Pu and the Vertical Distribution of 239+240Pu, 137Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil

Sequential Extraction of 239+240Pu and the Vertical Distribution of 239+240Pu, 137Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil

Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers

Plutonium isotopes in the Qinling Mountains of China

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Sequential Extraction of ^239+240Pu and the Vertical Distribution of ^239+240Pu, ¹³⁷Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil

Sequential Extraction of ^239+240Pu and the Vertical Distribution of ^239+240Pu, ¹³⁷Cs, and Heavy Metals in Chang-Bai Mountains’ Grassland Soil