Disequilibrium of uranium isotopes in some Syrian groundwater

被引：24

作者：

Abdul-Hadi, A ^{[1
]}

Alhassanieh, O ^{[1
]}

Ghafar, M ^{[1
]}

机构：

[1] Atom Energy Commiss Syria, Dept Chem, Damascus, Syria

来源：

APPLIED RADIATION AND ISOTOPES | 2001年 / 55卷 / 01期

关键词：

uranium; thorium; concentrations; disequilibrium; activity ratio; U-234/U-238; solubility; mobility;

D O I：

10.1016/S0969-8043(00)00369-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Uranium concentration in groundwater samples from three areas of Syria was determined using alpha -spectrometry and INAA. It was in the range of 0-6.13 mug/l in the phosphate areas. and lower than I ppb in the volcanic areas. The activity ratio of U-234/U-238 was investigated, and disequilibrium of uranium isotopes was found to occur (U-234/U-238 = 0.52-2.02). The excess of U-234 was calculated. This excess can be interpreted by higher mobility of U-234, which more readily forms the soluble (UO2)(2+) ion in comparison with U-238. most of which remains in the insoluble 4(+) state. This excess increases with increase in uranium concentration. Thorium concentration was measured using INAA, it was found to be in the rang 0-1.15 mug/l. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：109 / 113

页数：5

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