Distribution and sources of plutonium along the coast of Guangxi, China

Guan, Yao; Sun, Shuyue; Sun, Shaohan; Wang, Huijuan; Ruan, X. D.; Liu, Zhiyong; Terrasi, F.; Gialanella, L.; Shen, Hongtao

doi:10.1016/j.nimb.2018.09.047

Cited by 24 publications

(10 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, our 240 Pu/ 239 Pu atom ratios (0.187 ± 0.012, n = 6) were also comparable to the previous observations made elsewhere in the Chinese surface soils (0.183 ± 0.018, n = 71; Fig. 1), namely, Northwest China (0.178 ± 0.013, n = 21) 24–26,32 , Southwest China (0.187 ± 0.005, n = 6) 29,33–35 , South China (0.181 ± 0.008, n = 10) 9,36 , Central China (0.190 ± 0.025, n = 2) 37 , East China (0.177 ± 0.012, n = 5) 35,38 and Northeast China (0.187 ± 0.023, n = 27) 39,40 . As shown in Fig.…”

Section: Resultssupporting

confidence: 84%

Isotopic composition and source of plutonium in the Qinghai-Tibet Plateau frozen soils

Wang

2019

Sci Rep

View full text Add to dashboard Cite

The 239+240 Pu activities and 240 Pu/ 239 Pu atom ratios in the frozen soils of the Yellow River Source Area (YRSA) were determined to examine the Pu source and evaluate its environmental risk. The 239+240 Pu activities of surface frozen soils in the YRSA, ranging from 0.053 to 0.836 mBq g −1 , are comparable to those observed in China elsewhere (0.005–1.990 mBq g −1 ). The 240 Pu/ 239 Pu atom ratios of surface soils in the YRSA are in the range of 0.168–0.201 (average = 0.187 ± 0.012, n = 6), comparable to the global fallout of 0.180 ± 0.014. Based on the latitudinal and spatial distribution of Pu isotopic composition, I clarified that the Pu source is mainly from global fallout at present. The activity levels of Pu in the YRSA do far not cause a Pu toxicity to the downstream drinking water even the frozen soil begins to melt and release Pu to the Yellow River. However, since close-in fallout from Lop Nor where the Chinese nuclear tests were carried out during 1964–1980, high deposition and accumulation of Pu was observed in the Chinese soil cores through synthesizing an expanded Pu dataset, which alerts us it is necessary to further monitor the Pu activity levels in the YRSA soil cores to ensure the safety of downstream drinking water. Finally, I point out that information on Pu isotopes would help in establishing a baseline for future environmental risk assessment.

show abstract

Section: Resultssupporting

confidence: 84%

Isotopic composition and source of plutonium in the Qinghai-Tibet Plateau frozen soils

Wang

2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Similarly, the distribution of 239+240 Pu activity in sediment core SN2 also shows a typical one peak feature, which is consistent with the peak feature of 137 Cs in the sediment core, and indicates that the sediment dating is 1963 ( Fig. 6) (Guan et al 2018). In the deep-sea sedimentary environment, the source of marine sediments is domination.…”

Section: Distribution Of 239+240 Pu Activity In Sediment Cores From Tsupporting

confidence: 76%

“…Moreover, the inventory of 239+240 Pu within the range of 0°N-50°N tends to increase, and the values within the range of 40°N-50°N are the largest, which may be related to the fact that global atmospheric nuclear tests are mostly performed in the northern hemisphere. To study the changing trend of the distribution of the 239+240 Pu inventories in the sediment cores from the seas and estuaries of China, previous researches have studied 77 sediment cores in the marginal seas and estuaries of China (Nagaya and Nakamura 1992;Huh and Su 1999;Su and Huh 2002;Lee et al 2004;Wang and Yamada 2005;Dong et al 2010;Liu et al 2011a;Pan et al 2011;Wu et al 2014;Wang et al 2017;Guan et al 2018;Xu et al 2018;Zhang et al 2018;Zhuang et al 2019), including three sediment cores in the South China Sea, 55 sediment cores in the East China Sea, seven sediment cores in the Yellow Sea, and 12 sediment cores in the Bohai Sea.…”

Section: The Sediment Coresmentioning

confidence: 99%

“…6. 239+240 Pu activity and 240 Pu/ 239 Pu atom ratio distributions in sediment cores SN2 and SC07 (Pan et al 2011;Guan et al 2018).…”

Section: Distribution Of 239+240 Pu Activity In Sediment Cores From Tmentioning

confidence: 99%

“…6, SC07). Another type is that the 240 Pu/ 239 Pu atom ratios are consistent in the upper and lower parts of the sediment cores, but they are significantly higher than the ratios of global fallout and lower than the ratios of the PPG, such as core A8 from the Pearl River estuary (Wu et al 2014) and core SN2 from Beibu Bay (Guan et al 2018) (Figs. 6 and 7).…”

Section: Application Of Dating 239+240 Pu Activity In Marine Sedimentmentioning

confidence: 99%

See 2 more Smart Citations

Distribution and source of Pu in the sediments of the seas and estuaries of China—a review

Wang

2020

Anthropocene Coasts

Self Cite

View full text Add to dashboard Cite

The coastal zone is the most concentrated area of human activities, and it is also the main accumulation zone of continental sediments, which is an ideal area for studying anthropocene sedimentary records. This study summarizes the distribution of 239+240Pu activity, 239+240Pu inventory, and 240Pu/239Pu atom ratios in the sediments of the seas and estuaries of China. Studies have shown that the distribution of 239+240Pu activity in sediments is mainly influenced by sediment properties and ocean current dynamics. Furthermore, 239+240Pu activity in sediment cores has obvious peak characteristics, which can be used in sediment dating. In fact, 240Pu/239Pu atom ratios indicate that the Pu in the sediments of the seas and estuaries of China mainly comes from global fallout and the Pacific Proving Grounds (PPG). Pu from the PPG enters the seas of China through the North Equatorial Current and Kuroshio intrusion current. And the contribution of Pu from the PPG in the East China Sea, the South China Sea, and the Yangtze estuary is over 40%. Moreover, Pu has been applied in the tracer of land–sea interactions and ocean dynamics, and it can be used as a background value to study the changes of Pu in the coastal zone of China in the future.

show abstract

Vertical distribution of 137Cs and plutonium in Lake Taihu and Dianchi sediment cores: loss of radionuclides in shallow, eutrophic lakes

Chang

Liao

et al. 2021

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Distribution and sources of plutonium along the coast of Guangxi, China

Cited by 24 publications

References 17 publications

Isotopic composition and source of plutonium in the Qinghai-Tibet Plateau frozen soils

Isotopic composition and source of plutonium in the Qinghai-Tibet Plateau frozen soils

Distribution and source of Pu in the sediments of the seas and estuaries of China—a review

Vertical distribution of 137Cs and plutonium in Lake Taihu and Dianchi sediment cores: loss of radionuclides in shallow, eutrophic lakes

Contact Info

Product

Resources

About