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- Title
SEPARATION OF URANIUM(VI) FROM SOILS BY EXTRACTION IN AQUEOUS PEG (1550) -- Na<sub>2</sub>SO<sub>4</sub> -- Na<sub>2</sub>CO<sub>3</sub> TWO-PHASE SYSTEMS. I. PRELIMINARY RESULTS.
- Authors
Bulgariu, Dumitru; Bulgariu, Laura; Juravle, Doru; Condorachi, Daniel
- Abstract
In this paper preliminary results of studies concerning the extraction of uranium(VI) from soils in aqueous PEG (1550) 20 % - Na2SO4 20 % - Na2CO3 10-2-10-3 M two-phase systems are presented, as well as the spectrophotometric determination of extracted uranium with pirocatechol violet (PV). A special attention was given to the experimental factors (pH, redox potential, CO32- anion concentration and initial uranium concentration), which was found to influence both the formation and stability of aqueous two-phase extraction system, and the values of extraction parameters. The experimental values of distribution coefficients, extraction degree and enrichment coefficients for U(VI) extraction indicate an acceptable separation at pH=4-5, and at pH=8-9, respectively. Under certain work conditions, the increasing of U(VI) concentration in initial solution and of CO32- anion concentration determined an increase of extraction degree and of enrichment coefficient.
- Subjects
SEPARATION (Technology); URANIUM; RADIOACTIVE pollution of soils; SOIL pollution; EXTRACTION (Chemistry); SODIUM; COBALT
- Publication
Environmental Engineering & Management Journal (EEMJ), 2008, Vol 7, Issue 4, p389
- ISSN
1582-9596
- Publication type
Article
- DOI
10.30638/eemj.2008.055