Competition between five different chelates to capture of uranyl ion: Synthesis, spectroscopic, thermal, surface and biological investigations

Abstract

The uranium ion in various chemical forms is one of the most valuable metals that exists in seawater. To recognize the uranyl ion (UO22+) is a longstanding goal for the purposes of environmental remediation, metallurgical extraction, and water purification from seawater. Uranium complexes of the composition UO2L(NO3)2, where L is 2-[(5-o-chlorophenylazo-2-hydroxybenzylidin)amino]-phenol Schiff base (SB), N-(1-naphthyl)ethylenediamine (ND), N,N,N′,N′-tetramethylethylenediamine (TD), α,α′-bipyridyl (BP), or hexamethylenediamine (HD) were synthesized and characterized by several physicochemical techniques. This study investigated the microstructure properties of these complexes using XRD and SEM techniques. Furthermore, the antimicrobial activity of the complexes was assessed against two types of bacterium and fungus species. The complexes decompose endothermically in a single-to-fourth steps to give a solid powder of UO2 or UCx (where x=1 or 2) as the residual product through indefinite intermediates. All of the uranyl complexes seem to possess a hexagonal bipyramidal geometry surrounding the uranium atom.