Synergistic extraction of uranium from Korean black shale ore leach liquors using amine with phosphorous based extractant systems

Abstract

Synergistic extraction of uranium using amine combined with phosphorous based extractant systems was described. The present study focused on the continuous extraction processing of uranium to form precipitation under higher pH conditions and higher aqueous phase ratios. To address this, synergistic extraction studies were carried out with P-based extractants as synergists and investigations were done with better pairs with an aminebased extractant system. Finally, all of the developed synergistic extraction methodologies were compared with each other. This showed that Alamine 336 and D2EHPA was the best pair for uranium extraction, offering as much separation as possible from other associated metals.

Phosphate-Functionalized Polyethylene with High Adsorption of Uranium(VI)

“…Thereby, the development of adsorbents with a high affinity, excellent selective property, and simple preparation process is critical. 5 From the initial inorganic adsorbents to the most studied polyamidoxime (PAO)-based adsorbents and to more recent metal–organic frameworks, great efforts have been devoted to developing efficient adsorbents for extracting U(VI) from seawater.…”

“…The 4.5 billion tons of U­(VI) in the ocean can be considered as a sustainable and environmentally friendly substitute of the uranium terrestrial supply to sustain the demands of the nuclear power industry in the future. − The use of traditional adsorbents to recover U­(VI) from seawater is very challenging because the concentration of U­(VI) in seawater is very low (3.3 mg/L) and abundant competing ions (such as alkaline metals, alkaline earth metals, and heavy metals) coexist in seawater. Thereby, the development of adsorbents with a high affinity, excellent selective property, and simple preparation process is critical . From the initial inorganic adsorbents to the most studied polyamidoxime (PAO)-based adsorbents and to more recent metal–organic frameworks, great efforts have been devoted to developing efficient adsorbents for extracting U­(VI) from seawater.…”