Metal complexation of poly[1‐(2‐hydroxyethyl)aziridine‐co‐2‐methyl‐2‐oxazoline] in aqueous solution

Abstract

The metal complexation of water-soluble poly[l-(2-hydroxyethyl)aziridine-co-2methyl-2-oxazoline] with Co(II), Zn(II), Ni(II), Cu(II), Cr(III), Fe(III), Cd(II), Pb(II), and Sr(I1) ions was investigated in aqueous phase using Liquid-Phase Polymer-Based Retention (LPR). The study shows that all metal ions are complexed at pH 5 , except Co(I1) and Zn(I1). In contrast to Sr(II), which showed only a slight interaction over a pH range of 3 to 7, 94% of Co(I1) and 88% of Zn(I1) were retained at pH 7. At pH 3, only Cu(I1) and Cr(II1) ions interacted with the copolymer with retention values of 76% for Cu(I1) and 52% for Cr(II1). Viscosimetric measurements of the copolymer were performed in the presence of metal ions at different pH values. ZUSAMMENFASSUNG:Die Metallkomplexierung von wasserloslichem Poly[l-(2-hydroxyethyl)aziridin-co-2-methyl-2-oxazolin] mit Co(II), Zn(II), Ni(II), Cu(II), Cr(III), Fe(III), Cd(II), Pb(I1) und Sr(I1)-Ionen wurde in waBriger Phase mit der Methode der Liquid-Phase Polymer-Based Retention (LPR) untersucht. Die Studie zeigt, da13 alle Metallionen, auBer Co(I1) und Zn(II), bei pH 5 komplexiert wurden. Im Gegensatz zu Sr(II), das nur eine schwache Wechselwirkung in einem pH-Bereich von 3 bis 7 zeigte, wurden bei pH 7 94% Co(I1) und 88% Zn(I1) retentiert. Bei pH 3 zeigten nur Cu(I1) und Cr(II1) eine Wechselwirkung mit dem Polymeren, wobei die Retentionswerte 76% fur Cu(I1) und 52% fur Cr(II1) betrugen. Viskositatsmessungen des Copolymeren in Gegenwart von Metallionen wurden bei verschiedenen pH-Werten durchgefuhrt.

Poly[acrylamide-co-1-(2-hydroxyethyl)aziridine]: An efficient water-soluble polymer for selective separation of metal ions

“…23 The same retention profiles are found for the polymers charge/radius ratio, charge distribution, polarization of both ligands and the central atom, and the poly[1-(2-hydroxyethyl)aziridine] and poly[2-methyl-2-oxazoline-co-1-(2-hydroxyethyl)aziripossibility of chelate formation. The ionic radius of Cu(II) is relatively small in comparison with dine] (4) made by Geckeler et al, 24 which may indicate the nonparticipation of the amido group that of Cd(II) or Pb(II), but does not differ much from that of Co(II), Zn(II), or Ni(II).…”

Arsenic Sorption Using Mixtures of Ion Exchange Resins Containing N-Methyl-D-Glucamine and Quaternary Ammonium Groups

“…A number of these studies have developed sorption processes including adsorption and ion-exchange mechanisms, precipitation, solvent extraction, conjunction of membranes and polymers using simple materials such as activated carbon or more sophisticated materials such as especially tailored polymers as well as biosorbents, such as fungal or bacterial biomass, and materials of biological origin, including alginate and chitosan [2][3][4][5][6][7][8][9][10][11][12][13][14] .…”

Removal of Metal Ions From Bío Bío River Water by Liquid-Phase Polymer-Based Retention Technique

“…This method is known as the liquid-phase polymer-based retention (LPR) technique [12][13][14][15][16][17][18][19][20][21][22]. In the LPR, a water-soluble polymer solution and metal ion solution are contacted on the feed-side in a filtration system.…”