Stability Constants Important To The Understanding Of Plutonium In Environmental Waters Hydroxy And Carbonate Complexation Of Puosub 2sup

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ISBN 13 :
Total Pages : 147 pages
Book Rating : 4.:/5 (16 download)

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Download or read book Stability Constants Important to the Understanding of Plutonium in Environmental Waters, Hydroxy and Carbonate Complexation of PuO{sub 2}{sup +} written by and published by . This book was released on 1990 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation constants for the reactions PuO2 + H2O = PuO2(OH) + H+ and PuO2+ + CO32 = PuO2(CO3){sup −} were determined in aqueous sodium perchlorate solutions by laser-induced photoacoustic spectroscopy. The molar absorptivity of the PuO2+ band at 569 nm decreased with increasing hydroxide concentration. Similarly, spectral changes occurred between 540 and 580 nm as the carbonate concentration was increased. The absorption data were analyzed by the non-linear least-squares program SQUAD to yield complexation constants. Using the specific ion interaction theory, both complexation constants were extrapolated to zero ionic strength. These thermodynamic complexation constants were combined with the oxidation-reduction potentials of Pu to obtain Eh versus pH diagrams. 120 refs., 35 figs., 12 tabs.