The oxidation studies of a sulfur to a sulfate ion by various oxyhalide oxidants in organic (thiourea, methionine) and inorganic (sulfate, thiophosphate) compounds were carried out in an acidic solution. The optimized result of the oxidation reaction was obtained when a bromate compound (BrO3−) as an oxidant and a 3 M HNO3 solvent. The chemical yield for the oxidation of the organic and inorganic sulfur compounds to a sulfate ion was monitored as 80% for thiophosphate, 87% for methionine, and 100% for thiourea and sulfate within 5% RSD. The oxidation of thiourea required at least 1.6 equivalents of the bromate in an acidic solution. In the case of the oxidation of methionine and thiophosphate, the oxidation yield was above 80% if the bromate was used at 20 times that of the substrates. The chemical yield in the paper sample (WypAll) exceeded 100% because of its background sulfur contents (910 ppm). The sulfate ion was quantitatively measured by using GPC and/or LSC counting of 35S followed by precipitates of BaSO4. The interfering nuclides (14C, 32P) were removed in an acidic condition. The minimum detectable activity (MDA) of 35S was found to be 0.1 Bq/g.
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The 11th International Conference on Environmental Remediation and Radioactive Waste Management
September 2–6, 2007
Bruges, Belgium
Conference Sponsors:
- Nuclear Division and Environmental Engineering Division
ISBN:
978-0-7918-4339-0
PROCEEDINGS PAPER
Determination of 35S in Radioisotope Wastes by a Wet Oxidation
Heung N. Lee,
Heung N. Lee
Korea Atomic Energy Research Institute, Daejeon, South Korea
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Sang-Hoon Kang,
Sang-Hoon Kang
Korea Atomic Energy Research Institute, Daejeon, South Korea
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Hong Joo Ahn,
Hong Joo Ahn
Korea Atomic Energy Research Institute, Daejeon, South Korea
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Wook Hyun Sohn,
Wook Hyun Sohn
Korea Hydro & Nuclear Power, Daejeon, South Korea
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Kwang Yong Jee
Kwang Yong Jee
Korea Atomic Energy Research Institute, Daejeon, South Korea
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Heung N. Lee
Korea Atomic Energy Research Institute, Daejeon, South Korea
Sang-Hoon Kang
Korea Atomic Energy Research Institute, Daejeon, South Korea
Hong Joo Ahn
Korea Atomic Energy Research Institute, Daejeon, South Korea
Wook Hyun Sohn
Korea Hydro & Nuclear Power, Daejeon, South Korea
Kwang Yong Jee
Korea Atomic Energy Research Institute, Daejeon, South Korea
Paper No:
ICEM2007-7291, pp. 773-775; 3 pages
Published Online:
May 29, 2009
Citation
Lee, HN, Kang, S, Ahn, HJ, Sohn, WH, & Jee, KY. "Determination of 35S in Radioisotope Wastes by a Wet Oxidation." Proceedings of the The 11th International Conference on Environmental Remediation and Radioactive Waste Management. 11th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B. Bruges, Belgium. September 2–6, 2007. pp. 773-775. ASME. https://doi.org/10.1115/ICEM2007-7291
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