Theoretical insights into selective extraction of uranium from seawater with tetradentate N,O-mixed donor ligands

Abstract

The competition of uranium and vanadium ions is a major challenge in extracting uranium from seawater. In-depth exploration of the complexation of uranium and vanadium ions with promising ligands is...

A marine bacteria-inspired electrochemical regulation for continuous uranium extraction from seawater and salt lake brine

“…2a and S2, ESI †). [32][33][34] As shown in Fig. 2b, the disappearance of the nitrile peak at 2221 cm −1 and the emergence of both the C]N peak at 1643 cm −1 and the N-O peak at 871 cm −1 illustrate the successful functionalization of g-C 34 N 6 -COF.…”

Design and Modulation of Selectivity toward Vanadium(V) and Uranium(VI) Ions: Coordination Properties and Affinity of Hydroxylamino-Triazine Siderophores

“…In recent years, the synthesis of new siderophores has become the focus of intense scientific research for the development of strong and selective chelators for hard metal ions and their application in removal of toxic metals from the environment and humans and from the radioactive wastes produced by nuclear industries and metal mining from seawater. − Amidoxime-containing polymers are considered the most promising candidates for the extraction of uranium from the sea. − However, amidoximes lack desirable selectivity for binding uranium in the presence of other hard metal ions, in particular, vanadium­(V) and iron­(III). − In order to improve the ligands’ selectivity for binding [U VI O 2 ] 2+ , the chelating group has to satisfy the soft–hard acid–base properties and the geometric preferences of the metal ion. The equatorial plane of [U VI O 2 ] 2+ is the only one available for coordination, meaning that planar, penta-, or hexadentate hard-donor ligands fulfill the ligation requirements for selective binding of [U VI O 2 ] 2+ (Schemes and ) …”