TITLE

Variations of U/Th-series nuclides with associated chemical factors in the hot spring area of northern Taiwan

AUTHOR(S)
Chun-Chih Lin; Tieh-Chi Chu; Yu-Fen Huang
PUB. DATE
October 2003
SOURCE
Journal of Radioanalytical & Nuclear Chemistry;Oct2003, Vol. 258 Issue 2, p281
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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. The 234U/238U ARs have been ascribed to alpha recoil and selective leaching of 234U, while the 234U/238U disequilibrium was not significant with regard to the statistical error. Variations of 230Th/234U ARs can be attributed to the different chemical properties of 230Th and 234U. The disequilibrium of 226Ra/230Th can be ascribed to the complexation of thorium with Cl- and SO42-, and to the co-precipitation of radium with sulfates. The disequilibrium of 228Th/232Th can be due to the co-precipitation of 228Ra with (Ba,Pb)SO4 and to the migration of 228Th from the sediment into the water.
ACCESSION #
16782178

 

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