Recovery of Uranium from Seawater: Preparation and Development of Polymer-Supported Extractants

[摘要] A new series of polymer-supported extractants is proposed for the removal and recovery of uranium from seawater. The objective is to produce polymers with improved stability, loading capacity, and sorption kinetics compared to what is found with amidoximes. The target ligands are diphosphonates and aminomethyldiphosphonates. Small molecule analogues, especially of aminomethyldiphos-phonates, have exceptionally high stability constants for the uranyl ion. The polymeric diphosphonates will have high affinities due to their ability to form six-membered rings with the uranyl ion while the aminomethyldiphosphonates may have yet higher affinities due to possible tridentate coordination and their greater acidity. A representative set of the polymers to be prepared are indicated.

[发布日期] 2013-12-01

[学科分类] 核能源与工程

[关键词] EXTRACTION;URANIUM;SEAWATER;PHOSPHONATES;POLYMERS;AFFINITY;STABILITY;PH VALUE;KINETICS;LIGANDS;SORPTION;URANYL COMPOUNDS