Highly selective extraction of oxonium anions can be achieved by the new ligand, 2,2′-(methylimino)bis(N,N-dioctylacetamide) (MIDOA). MIDOA has a high solubility in n-dodecane, any types of diluents can be employed for the solvent extraction. The extraction using MIDOA was performed under the condition, HNO3 and n-dodecane, considering the chemical process of high-level radioactive liquid waste. It was obvious that the oxonium anions, like TcO4−, ReO4−, Cr2O72−, MoO42−, and WO42−, are extracted, and the distribution ratios (D) decrease with increase of HNO3 concentration.
新型
配体 2,2′-(甲基亚
氨基)双(N,N-二辛基乙酰胺)(M
IDOA)可实现对羰基阴离子的高选择性萃取。M
IDOA 在正
十二烷中有很高的溶解度,因此可以使用任何类型的稀释剂进行溶剂萃取。考虑到高放射性液体废物的
化学过程,使用 M
IDOA 在
HNO3 和正
十二烷条件下进行了萃取。结果表明,TcO4-、ReO4-、Cr2O72-、MoO42- 和 WO42-等羰基阴离子被萃取出来,且分布比(D)随 浓度的增加而降低。