Particle-size dependent distribution of thorium and uranium isotopes in soil

被引：7

作者：

Frindik, O ^{[1
]}

Vollmer, S ^{[1
]}

机构：

[1] Fed Res Ctr Nutr, Cent Lab Isotope Studies, D-76131 Karlsruhe, Germany

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 1999年 / 241卷 / 02期

关键词：

D O I：

10.1007/BF02347464

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Undisturbed, non-fertilized woodland soil ("loamy sandy soil" type) from Im below surface was dry and wet sieved. Sieving fractions of <10-1000 mu m were analyzed for total alpha-activity. Thorium and uranium contents were determined by alpha-spectrometry after radiochemical separation, Soluble and insoluble parts of thorium and uranium were determined in the sieved fractions indicating that the isotope distribution in soil correlates with the particle size distribution: The smaller the size fraction the higher the isotope content. Isotope ratios of Th-228/Th-232, and U-234/U-238 are discussed.

引用

页码：291 / 296

页数：6

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