Removal of Heavy Metal Ions with Phenoxy Substituted Cyclotriphosphazene Derivatives Bearing Imine

Abstract

Hexa [4-(4-hydroxy-phenyliminomethyl) phenoxy] cyclotriphosphazene (A1) and Hexa [4-(2- hydroxyphenyliminomethyl)phenoxy] cyclotriphosphazene (A2) were derived from the reactions of hexa(4-formyl-phenoxy)cyclotriphosphazene and hexa(2-formyl-phenoxy)cyclotriphosphazene with 4-aminophenol and 2-aminophenol. Adsorption process in an aqueous solution of Cu, Fe, Mn and Zn ionsof the organophosphazenes bearing imine groups were performed depending on the initialconcentration of metal ions and time. All of the compounds adsorbed the selected metal ions in thefirst 10 minutes. When the initial concentration of metal ions increases, the amount of metal ionsadsorbed of organophosphazene with imine groups increased. Although the chemical structures of thecompounds are different, the amount of adsorbed metal was about the same.