Particle-size speciation of Pu isotopes in surface soils from Inner Mongolia (China) and its implications for Asian Dust monitoring

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• 作者：Wei Dong^a ; ¹ ; Jian Zheng^b ; ^{zheng.jian@qst.go.jp} ; Qiuju Guo^a
• 关键词：Pu isotopes ; Soil particle-size speciation ; Asian Dust ; Inner Mongolia ; Global fallout
• 刊名：Applied Radiation and Isotopes
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：120
• 期：Complete
• 页码：133-136
• 全文大小：407 K
• 卷排序：120

文摘

Soil particle size-fractionated Pu isotope speciation in surface soils from Inner Mongolia was investigated. 240Pu/239Pu atom ratios ranged narrowly (0.169–0.200) and indicated global fallout character. 239+240Pu activities increased with decreasing soil particle size. A spherical model could well simulate 239+240Pu activities as a function of particle diameter when soil particle size was less than 600 µm. This study has important implications for Asian Dust monitoring.