Study on radiogenic lead recovery from residues in thorium facilities using ion exchange and electrochemical process
| Autor: | V.L.R. Salvador, C.A da Silva Queiroz, Alcídio Abrão, S.M. da R. Rizzo, S. Forbicini, M.E. de Vasconcellos, José A. Seneda, C. A. L. G. de O. Forbicini |
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| Rok vydání: | 2010 |
| Předmět: |
Radiogenic nuclide
Ion exchange Chemistry Inorganic chemistry Energy Engineering and Power Technology Ionic bonding Thorium chemistry.chemical_element Hydrochloric acid chemistry.chemical_compound Lead (geology) Nuclear Energy and Engineering Nitric acid Decay chain Safety Risk Reliability and Quality Waste Management and Disposal |
| Zdroj: | Progress in Nuclear Energy. 52:304-306 |
| ISSN: | 0149-1970 |
| DOI: | 10.1016/j.pnucene.2009.04.002 |
| Popis: | Brazil has one of the biggest mineral thorium reserves, enabling the use of this material in its nuclear reactors. Consequently, this cycle of the fuel would need an initial purification stage of the natural thorium, generating residues from chemical treatment. This work provides operational parameters for the recovery of existing values in these residues, especially the radiogenic lead, that is a radioisotope of thorium decay chain, using ionic exchange technique associated to the electrochemical one. The treatment by ionic exchange in anionic resin and hydrochloric acid medium, provides about 33.4% of radiogenic lead. At the electrochemical process, lead was reduced to a metal in nitric acid medium, presenting a recovery of 98%. The electrochemical process presents an increase in the cost, nevertheless the technological importance of the radiogenic lead in the production of new elements, besides being a strategic material, justifies its use. |
| Databáze: | OpenAIRE |
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