The state of the tetravalent technetium in aqueous solution was studied by means of the electrophoresis. The ionic mobilities of different technetium ions were determined, and on this base conclusions were made on the hydrolysis of the tetravalent technetium. The hydrolysis constants could be calculated.
Gomonova, T. V.; Koltunov, V. S., Radiokhimiya, 1990, vol. 32, p. 492 - 494
作者:Gomonova, T. V.、Koltunov, V. S.
DOI:——
日期:——
Kinetics of Technetium Reactions: XV. Tc(IV) Oxidation with Persulfate Ions in HClO4 Solution
作者:V. S. Koltunov、T. V. Gomonova、G. V. Koltunov
DOI:10.1007/s11137-005-0065-y
日期:2005.3
Tc(IV) is oxidized with persulfateions in HClO4 solution by reactions with both S2O82− ion and product of its thermal decomposition, Caro acid, H2SO5. The reaction rate at 35°C and solution ionic strength µ = 1 is described by the equation d[Tc(IV)]/d t = k 1[Tc(IV)][S2O82−] + k 3[Tc(IV)][HSO5−]/[H+], where k 1 = 0.88±0.04 l mol−1 min−1 and k 3 = 110±5 min−1. With increasing ionic strength to µ =
Tc(IV)通过与S 2 O 8 2-离子及其热分解产物(盐酸,H 2 SO 5)反应,在HClO 4溶液中被过硫酸根离子氧化。在35℃和溶液离子强度反应速率μ= 1由公式d [TC(IV)] / d描述 吨 = ķ 1 [TC(IV)] [S 2 ö 8 2- ] + ķ 3 [ TC(IV)] [HSO 5 - ] / [H + ],其中 ķ 1 = 0.88±0.04升摩尔-1分钟-1和 ķ 3= 110±5min -1。随着离子强度增加到µ = 2,两个速率常数都降低( 在35°C下 k 1 = 0.58±0.08 l mol -1 min -1和 k 3 = 52±2 min -1)。整个反应的活化能为77.7±8.1kJ mol -1。讨论了两种反应的机理。