论文部分内容阅读
本文研究了H~+,N0_2~-对在μ=3的Pu(Ⅳ)高氯酸溶液中的光化学行为的影响。证明NO_3~-对光氧化有较大的影响。在63℃和μ=3时,对有无紫外光作用时Pu(Ⅳ)歧化反应进行了比较,结果表明紫外光照射有利于歧化反应的进行,二者反应浓度商的比值在[H~+]为1.0,1.5,2.0和3.0mol/l时分别为2.2×10~3,4.15×10~2,1,98×10~2和3.16×10~2。 还研究了甲醇、乙醇、UO~(2+)和Fe~(3+)对Pu(Ⅳ)在HNO~3溶液中光化学行为的影响。发现Fe~(3+)的加入可使Pu(Ⅵ)量显著减少,当[Fe~(3+)≥0.038mol/l时,可使Pu(Ⅵ)的生成量由>80％降低到<10％。对Fe~(3+)抑制Pu(Ⅵ)生成的机理进行了初步探讨。
In this paper, the effect of H ~ + and N0_2 ~ - on the photochemical behavior of Pu (Ⅳ) perchloric acid solution with μ = 3 was studied. It is proved that NO_3 ~ - has a great influence on photooxidation. At 63 ℃ and μ = 3, the disproportionation reaction of Pu (Ⅳ) with or without UV light was compared. The results showed that UV irradiation favored the disproportionation reaction, the ratio of the two reaction concentrations was in the range of [H ~ + ] Were 2.2 × 10 ~ 3, 3.45 × 10 ~ 2, 1.98 × 10 ~ 2 and 3.16 × 10 ~ 2 at 1.0, 1.5, 2.0 and 3.0 mol / The effects of methanol, ethanol, UO 2+ and Fe 3+ on the photochemical behavior of Pu (Ⅳ) in HNO 3 were also studied. It is found that the amount of Pu (Ⅵ) can be reduced from> 80% when the concentration of [Fe 3+> 0.038mol / 10%. The formation mechanism of Pu (Ⅵ) by Fe ~ (3+) was preliminarily discussed.