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研究了二(2,4,4三甲基戊基)二硫代膦酸(HBTMPDTP)磷酸三丁酯(TBP)煤油(OK)从pH=2～4的10molLNaNO3介质中萃取示踪量镅的行为。结果表明,HBTMPDTPTBP体系有明显的协萃效应。考察了HBTMPDTP和TBP浓度及平衡水相pH值对镅的分配比的影响,用斜率法测定了协萃配合物的组成为:AmA3·HA·TBP。计算了协萃平衡常数并讨论了萃取机理。
The extraction of tracer amount 镅 from 10molLNaNO3 media with pH = 2-4 was studied with kerosene (TBP) of bis (2,4,4-trimethylpentyl) dithiophosphonic acid (HBTMPDTP) behavior. The results show that HBTMPDTPTBP system has a significant synergistic effect. The effects of the concentrations of HBTMPDTP and TBP and the equilibrium pH on the distribution ratio of 镅 were investigated. The composition of the complex was determined by the slope method as follows: AmA3 · HA · TBP. The equilibrium constant was calculated and the extraction mechanism was discussed.