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

ABSTRACT: Selective recognition and removal of sulfate and phosphates from aqueous media in the presence of highly competing anions is very demanding because of their biological and environmental implications. In this paper, we present the anion recognition approach for the selective and efficient extraction of sulfate by nitrophenyl-functionalized tris-urea receptors (L₁-L₂) from highly competitive aqueous media with an equivalent concentration of nitrate and other anions. Tetrabutylammonium hydroxide has been used for the first time as a phase transfer anionic extractant for sulfate-exchange from the aqueous phase to the organic phase (dichloromethane) containing a tris-urea receptor (L₁-L₃). The sulfate extraction efficacy of L₂ (≈84-90%) was

SUBMITTER: Gogoi A 

PROVIDER: S-EPMC10230270 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature