Solubility of thorium under anoxic conditions

Jussi Jernström, Ulla Vuorinen, M. Hakanen, A. Niskanen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The solubility of thorium was studied in 0.1 M NaCl solution under anoxic carbonate-free conditions. The steady state was approached from both oversaturation and undersaturation. The equilibration periods used ranged up to 71 days. The crystallization of the formed amorphous or microcrystalline solid Th phases was examined by X-ray diffraction. With ICP-MS, the measured Th concentrations in solution were between 10-11 and 10-8 M. No indication of Th colloids was detected in the SEM and TEM examinations of the ultrafiltration membrane specimens and the aliquots of solution prepared before and after ultrafiltration. The measured Th concentrations agreed fairly well with the computed values (EQ3/6 code) of Th concentration, about 2 × 10-9 M under CO2-free conditions.
Original languageEnglish
Pages (from-to)465-470
Number of pages6
JournalRadiochemistry
Volume43
Issue number5
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

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Thorium
thorium
solubility
Solubility
Ultrafiltration
inductively coupled plasma mass spectrometry
Carbonates
Colloids
Crystallization
colloids
solid phases
carbonates
indication
examination
crystallization
membranes
Transmission electron microscopy
Membranes
X ray diffraction
transmission electron microscopy

Cite this

Jernström, J., Vuorinen, U., Hakanen, M., & Niskanen, A. (2001). Solubility of thorium under anoxic conditions. Radiochemistry, 43(5), 465-470. https://doi.org/10.1023/A:1013065106054
Jernström, Jussi ; Vuorinen, Ulla ; Hakanen, M. ; Niskanen, A. / Solubility of thorium under anoxic conditions. In: Radiochemistry. 2001 ; Vol. 43, No. 5. pp. 465-470.
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Jernström, J, Vuorinen, U, Hakanen, M & Niskanen, A 2001, 'Solubility of thorium under anoxic conditions', Radiochemistry, vol. 43, no. 5, pp. 465-470. https://doi.org/10.1023/A:1013065106054

Solubility of thorium under anoxic conditions. / Jernström, Jussi; Vuorinen, Ulla; Hakanen, M.; Niskanen, A.

In: Radiochemistry, Vol. 43, No. 5, 2001, p. 465-470.

Research output: Contribution to journalArticleScientificpeer-review

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AB - The solubility of thorium was studied in 0.1 M NaCl solution under anoxic carbonate-free conditions. The steady state was approached from both oversaturation and undersaturation. The equilibration periods used ranged up to 71 days. The crystallization of the formed amorphous or microcrystalline solid Th phases was examined by X-ray diffraction. With ICP-MS, the measured Th concentrations in solution were between 10-11 and 10-8 M. No indication of Th colloids was detected in the SEM and TEM examinations of the ultrafiltration membrane specimens and the aliquots of solution prepared before and after ultrafiltration. The measured Th concentrations agreed fairly well with the computed values (EQ3/6 code) of Th concentration, about 2 × 10-9 M under CO2-free conditions.

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Jernström J, Vuorinen U, Hakanen M, Niskanen A. Solubility of thorium under anoxic conditions. Radiochemistry. 2001;43(5):465-470. https://doi.org/10.1023/A:1013065106054