Exploration of the potential application of plutonium isotopes in source identification of sandstorm in the atmosphere of Beijing  

作　　者：Jie Ouyang Yang Shao Min Luo Jilong Zhang Xiongxin Dai Lingling Ma Diandou Xu 

机构地区：[1]Beijing Engineering Research Center of Radiographic Techniques and Equipment,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]Institute of Environmental and Health Sciences,College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,China [3]State Nuclear Security Technology Center,Beijing 102401,China [4]China Institute for Radiation Protection,Taiyuan 030000,China

出　　处：《Chinese Chemical Letters》2022年第7期3516-3521,共6页中国化学快报（英文版）

基　　金：supported by the financial supports from the National Natural Science Foundation of China(Nos.U1932103,U1832212,11875266);Key Deployment Projects of Chinese Academy of Sciences(No.ZDRW-CN-2018–1);Beijing Natural Science Foundation(No.7191008)。

摘　　要：Plutonium(Pu)is an anthropogenic radionuclide which mainly derived from atmospheric nuclear tests in the environment.In this study,the Pu isotopes(^(239)Pu and^(240)Pu)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 ^(239)Pu and ^(240)Pu in the aerosol samples of Beijing were ranged from 0.62 nB q/m^(3)to 99.6 n Bq/m^(3)for ^(239)Pu and 3.51 nBq/m^(3)to 60.23 n Bq/m^(3)for ^(240)Pu,respectively.^(239)Pu and ^(240)Pu 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^(239)Pu and^(240)Pu detected in sandstorm samples further indicated Pu was closely related to the occurrence of sandstorms.The global fallout characteristics of^(240)Pu/^(239)Pu atom ratios(average0.20,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^(239)Pu and Al(r^(2)=0.934),240Pu and Al(^(r)2=0.525)revealed that soil resuspension was a primary source of atmospheric Pu in Beijing.These results implied that the combination of^(239)Pu,^(240)Pu and Al could be used as the potential tracer of sandstorm.

关 键 词：PLUTONIUM ATMOSPHERE Source identification SANDSTORM 

分 类 号：X513[环境科学与工程—环境工程] O657.63[理学—分析化学]