Anion-exchange facilitated selective extraction of sulfate and phosphate by overcoming the Hofmeister bias

Abstract

The paper showcases the anion recognition approach for the selective and efficient extraction of sulfate and phosphates by nitrophenyl-functionalized tris-urea and thiourea receptors, respectively from highly competitive aqueous media.

A molecular-design approach for selective sulfate separation from competitive acidic and alkaline aqueous media

“…), acting as an anion-exchanger between the immiscible aqueous-organic phases. 71 Sulfate could selectively be extracted from the alkaline aqueous media in the presence of nitrate, chloride and other competing anions, establishing E 16 and E 17 as effective HBD receptors for sulfate removal from aqueous media (Fig. 13).…”