Variations of U/Th-series nuclides with associated chemical factors in the hot spring area of northern Taiwan
Variations of U/Th-series nuclides with associated chemical factors in the hot spring area of northern Taiwan
复制标题
台湾北部温泉区U/Th系核素变化及相关化学因子
DOI：
10.1023/a:1026281620157
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发表时间：
2003
影响因子：
1.6
通讯作者：
Yu
中科院分区：
文献类型：
--
作者：
Chun;T. Chu;Yu
本文测定了台北市温泉区U/Th系列核素的活度比（AR）与相关因子（pH、Eh、Cl-和SO 42-浓度）的关系。水体中U、Th含量随pH值的升高而降低，234 U/238 U的ARs归因于α反冲和234 U的选择性淋溶，而234 U/238 U的不平衡在统计误差上不显著。230 Th/234 U AR的变化可归因于230 Th和234 U化学性质的不同。226 Ra/230 Th的不平衡可归因于钍与Cl-和SO 42-的络合以及镭与硫酸盐的共沉淀。228 Th/232 Th的不平衡可能是由于228 Ra与（Ba，Pb）SO 4的共沉淀以及228 Th从沉积物中迁移到水中所致。
The relationship of the activity ratios (ARs) of U/Th-series nuclides and associated factors (pH, Eh, and the concentrations of Cl-and SO42-) in the hot spring area of Taipei were determined. The contents of U and Th in water decreased with increasing pH. The234U/238U ARs have been ascribed to alpha recoil and selective leaching of234U, while the234U/238U disequilibrium was not significant with regard to the statistical error. Variations of230Th/234U ARs can be attributed to the different chemical properties of230Th and234U. The disequilibrium of226Ra/230Th can be ascribed to the complexation of thorium with Cl-and SO42-, and to the co-precipitation of radium with sulfates. The disequilibrium of228Th/232Th can be due to the co-precipitation of228Ra with (Ba,Pb)SO4and to the migration of228Th from the sediment into the water.