论文部分内容阅读
研究了锕系元素Ａｍ３＋和镧系元素Ｅｕ３＋、Ｎｄ３＋在Ｄ３０１－ＤＨＤＥＣＭＰ树脂上的交换容量、吸附速率及溶液酸度对分配比的影响，并对Ｄ３０１－ＤＨＤＥＣＭＰ树脂吸附Ｅｕ、Ｎｄ前后的红外光谱图作了分析和比较。实验表明：Ｄ３０１－ＤＨＤＥＣＭＰ树脂和ＤＨＤＥＣＭＰ萃取剂在ＨＮＯ３介质中均对锕系和镧系元素具有较强的吸附能力。分配比随着溶液中硝酸浓度的增加而增加，在ＨＮＯ３浓度大于８ｍｏｌ／Ｌ时，分配比有所回落；到１０ｍｏｌ／Ｌ时，再随酸度升高而上升。Ｄ３０１－ＤＨＤＥＣＭＰ树脂对Ａｍ３＋、Ｅｕ３＋、Ｎｄ３＋具有很好的吸附动力学性能，在１ｍｉｎ内即可达到吸附平衡。在酸性介质内对Ｅｕ、Ｎｄ的交换容量分别为０．２８、０．２２ｍｍｏｌ／ｇ干树脂
The effects of the exchange capacity, adsorption rate and solution acidity of actinides Am3 +, lanthanides Eu3 + and Nd3 + on the D301-DHDECMP resin were studied. The infrared spectra of D301-DHDECMP resin before and after the adsorption of Eu and Nd Analysis and comparison. Experiments show that: D301-DHDECMP resin and DHDECMP extractant in HNO3 medium for actinides and lanthanides have strong adsorption capacity. The distribution ratio increased with the increase of nitric acid concentration in the solution. When the concentration of HNO3 was more than 8mol / L, the distribution ratio decreased slightly. When the concentration increased to 10mol / L, it increased with the increase of acidity. D301-DHDECMP resin has good adsorption kinetics for Am3 +, Eu3 + and Nd3 +, and adsorption equilibrium can be achieved within 1min. The exchange capacity of Eu and Nd in acidic media were 0.28,0.22mmol / g dry resin respectively