论文部分内容阅读
研究了二 ( 2 乙基己基 )二硫代磷酸 (DEHDTP)在常量稀土存在时对Am3+、Nd3+、Eu3+和Tm3+的萃取。研究结果表明 ,当萃取剂起始浓度为 0 1mol/L时 ,平衡 pH值越大 ,分离因数越大( β(Am/Eu) =2 7 8) ;萃取剂皂化度和起始 pH相同时 ,萃取剂浓度越小 ,分离因数越大 ;平衡 pH值固定时 ,稀土离子浓度越大 ,分离因数越大 ;DEHDTP和三辛基氧膦 (TOPO)协同萃取时 ,分离因数β(Am/Eu) 可提高到 71 4。
The extraction of Am3 +, Nd3 +, Eu3 + and Tm3 + by di (2ethylhexyl) dithiophosphoric acid (DEHDTP) in the presence of rare earths was studied. The results showed that when the initial concentration of extractant was 0 1mol / L, the more the equilibrium pH, the larger the separation factor (β (Am / Eu) = 2 7 8). When the extractant saponification degree was the same as the initial pH , The smaller the extractant concentration is, the larger the separation factor is. When the equilibrium pH is fixed, the larger the concentration of rare earth ions is, the larger the separation factor is. When the extraction is carried out with DEHDTP and TOPO, the separation factor β (Am / Eu ) Can be increased to 71 4.