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dc.contributor.authorWang, Martha T.en_US
dc.date.accessioned2017-12-06T16:11:23Z
dc.date.available2017-12-06T16:11:23Z
dc.date.issued1961
dc.date.submitted1961
dc.identifier.otherb14563708
dc.identifier.urihttps://hdl.handle.net/2144/25846
dc.descriptionThesis (M.A.)--Boston Universityen_US
dc.description.abstractThe extraction of uranium with O.lM trioctylphosphine oxide in cyclohexane in the presence of hydroxyethylethylenediaminetriacetic acid was shown to be most effective in the pH range from 0.5 to 1.5. A pH of 1.0 has been chosen as the working level for the extraction. It was found that under the above conditions uranium(VI) can be extracted quantitatively. The method used for the determination of uranium was based on the colorimetric method given by Horton and White in which dibenzoylmethane was used to form a colored complex in the presence of pyridine as a buffer agent in ethyl alcohol. The absorbances at the wave length 405 mu were measured. An interference study at a uranium concentration level of 0.050 mg. per ml. was made to find the tolerance level of various diverse ions of 0.500, 0.050 and 0.005 mg. per ml. concentrations. The metal ions that were studied were: aluminium(III), barium(II), bismuth(III), cadmium(II), cerium(III), chromium(III), cobalt(II), copper(II), iron(II), iron(III), lead(II), magnesium(II), manganese(II), nickel(II), potassium(I), silver(I), sodium(I), thorium(IV), zinc(II), and zirconium( IV). It was found that cerium (III), lead(II), thorium(IV) and zirconium(IV) interfered with the extraction of uranium under the above conditions. Triphenylphosphine sulfide was prepared, as described by Michaelis, by the direct addition of elementary sulfur to triphenylphosphine. Attempts were made to use triphenylphosphine sulfide as an extractant for the following metal ions: aluminium(III) bismuth(III), chromium(VI), copper(II), magnesium(II), manganese( VII), mercury(II), tin(II), and zinc(II). The results obtained indicated that triphenylphosphine sulfide did not extract the above metals.en_US
dc.language.isoen_US
dc.publisherBoston Universityen_US
dc.rightsBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictions.en_US
dc.subjectUranium extractionen_US
dc.titleThe extraction of Uranium by some trisubstituted phosphine oxides and sulphidesen_US
dc.typeThesis/Dissertationen_US
etd.degree.nameMaster of Artsen_US
etd.degree.levelmastersen_US
etd.degree.disciplineArtsen_US
etd.degree.grantorBoston Universityen_US


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