摘要
研究了单甲基肼(MMH)浓度、酸度、温度及预处理时间等对钌预处理效果的影响。采用溶剂萃取法研究了RuNO硝酸根配合物与MMH的反应动力学,75℃下该反应的表观速率方程为:r=Kc6.38(RuNO(Ⅲ)).c2.60(MMH)c-0.88(HNO3)。反应速度随着MMH浓度增加而加快,随着HNO3浓度增加下降。75℃下,料液经MMH预处理2 h,Ru的分配比显著降低,预处理效果明显。
The influence of monomethylhydrazine（MMH） concentration, acidity, temperature and heat preservation time on decontamination of ruthenium（Ru） have been studied in the paper. By solvent extraction method, a reaction rate equation of the system studied is obtained as follows： r= Kc6.38 （RuNO（ Ⅲ ）） c2.60 （MMH） c-0.88 （HNO3）. The reaction rate increases with the increase of MMH concentration, while decreases with the increase of nitric acid concentration. The Ru distribution coefficient decreases obviously by 2 h pretreatment with the system of 0.1 mol/L MMH and 0. 2 mol/L HNO3 at 75 ℃. By this way, the extractable Ru content decreases, and the effect of pretreatment is obvious.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2010年第1期8-12,共5页
Journal of Nuclear and Radiochemistry
关键词
单甲基肼
钌
预处理
速率方程
monomethylhydrazine
ruthenium
pretreatment
rate equation
