Diglycolamide-functionalized dendrimers: Studies on Americium(III) pertraction from radioactive waste

作者：Ansari Seraj A; Mohapatra Prasanta K^*; Leoncini Andrea; Huskens Jurriaan; Verboom Willem

来源：Separation and Purification Technology, 2017, 187: 110-117.

DOI：10.1016/j.seppur.2017.06.028

• Diglycolamide
• Dendrimer
• Radioactive waste
• Liquid membrane
• Americium

Diglycolamide (DGA)-functionalized poly(propylene imine) diaminobutane dendrimers were evaluated as the carrier in supported liquid membranes (SLMs) for selective recovery of trivalent actinides over uranium. The 0, 1st, and 2nd generation dendrimers with 2, 4, and 8 DGA moieties, termed as L-I, L-II, and L-III, respectively, gave D-Am values of 0.11 +/- 0.02, 41.9 +/- 3.21 and 109.4 +/- 6.22 in solvent extraction studies using I mmol/L ligand solutions in a diluent mixture of 95% n-dodecane + 5% iso-decanol. SLM studies using polytetrafluoroethylene flat sheet membrane filters impregnated with 1 mmol solutions of L-II and 1411 suggested quantitative mass transfer of Pu4+, Am3+, and Eu3+ from 3 mol/L HNO3 in about 5 h. Various diffusional parameters affecting SLM transport have been calculated for better understanding the transport data. The stability of the SLM was also studied over a period of five days.

• 出版日期2017-10-31