Fe~(3+)和肼的衍生物共存时对Np(Ⅵ)还原反应的研究

STUDY ON THE REDUCTION OF Np(Ⅵ) WITH Fe~(3+) AND HYDRAZINE DERIVATIVES

摘要: 研究了肼的衍生物与Fe3+的反应对Np(Ⅵ )还原反应速率的影响。单甲基肼 ,偏二甲基肼和2 羟基乙基肼均以较慢的速率将Fe3+还原为Fe2 +,在温度为 2 93K时 ,其反应速率常数分别为0 0 2 3,0 11和 0 4 5min- 1。生成的Fe2 +能以较快的速率将Np(Ⅵ )还原为Np(Ⅴ )。导出了Fe3+影响Np(Ⅵ )还原速率的关系式

Abstract: Fe 3+ can be slowly reduced to Fe 2+ by monomethylhydrazine, 1,1 dimethylhydrazine and 2 hydroxylethylhydrazine as a reductant. Apparent rate constants for the reactions are determined to be 0.023, 0.11 and 0.45 min -1 at 293 K, respectively. The resultant Fe 2+ ions can quickly reduce Np(Ⅵ) to Np(Ⅴ) and Fe 2+ convert to Fe 3+ . Fe 3+ ion seems to be a catalyst for reduction of Np(Ⅵ). Based on experimental results, a kinetic equation of the Fe 3+ ion as function of the rate of Np(Ⅵ) reduction is obtained.