Plutonium(Pu)is an anthropogenic radionuclide which mainly derived from atmospheric nuclear tests in the environment.In this study,the Pu isotopes(239Pu and 240Pu)in aerosol samples collected during the sandstorm and non-sandstorm period were measured by accelerator mass spectrometry(AMS)and the behavior of Pu was studied.The activity concentrations of 239Pu and 240Pu in the aerosol samples of Bei-jing were ranged from 0.62 nBq/m3 to 99.6 nBq/m3 for 239Pu and 3.51 nBq/m3 to 60.23 nBq/m3 for 240Pu,respectively.239Pu and 240Pu concentrations exhibited a remarkable seasonal variation trend,with the higher results showed in spring,and the relatively lower concentrations in winter.The observed higher concentration of 239Pu and 240Pu detected in sandstorm samples further indicated Pu was closely related to the occurrence of sandstorms.The global fallout characteristics of 240Pu/239Pu atom ratios(average 0.20,ranging from 0.16 to 0.27)in aerosol samples indicating that global fallout was the major source of Pu in the atmosphere.Using aluminum(Al)as an indicator of soil resuspension,significant positive correlation between 239Pu and Al(r2=0.934),240Pu and Al(r2=0.525)revealed that soil resuspension was a primary source of atmospheric Pu in Beijing.These results implied that the combination of 239Pu,240Pu and Al could be used as the potential tracer of sandstorm.

Jie Ouyang;Yang Shao;Min Luo;Jilong Zhang;Xiongxin Dai;Lingling Ma;Diandou Xu

Beijing Engineering Research Center of Radiographic Techniques and Equipment,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Institute of Environmental and Health Sciences,College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,China;State Nuclear Security Technology Center,Beijing 102401,China;China Institute for Radiation Protection,Taiyuan 030000,China

中国化学快报（英文版）

[1]Jie Ouyang;Yang Shao;Min Luo;Jilong Zhang;Xiongxin Dai;Lingling Ma;Diandou Xu-.Exploration of the potential application of plutonium isotopes in source identification of sandstorm in the atmosphere of Beijing)[J].中国化学快报（英文版）,2022(07):3516-3521

Plutonium,nBq

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