Chelation Properties of Some Phenolic‐Formaldehyde Polymers Toward Some Trivalent Lanthanide Ions

Abstract

The chelation behavior of the phenolic-formaldehyde polymers, poly(2,4dihydroxybenzoic acid-3,5-diylmethylene) polymer I, poly(2-hydroxybenzoic acid-3,5-diylmethylene) polymer II, and poly(3-hydroxybenzoic acid-4,6-diylmethylene) polymer III toward the trivalent lanthanide metal-ions, La 3þ , Nd 3þ , Sm 3þ , Gd 3þ , and Tb 3þ was studied by a static batch equilibration technique at 258C as a function of contact time, pH, and counter ion. The highest metal-ion uptake of these polymers was achieved at pH 7.0 and by using perchlorate as the counter ion. Results of the study revealed that polymer I has the highest metal-ion 721 uptake capacity, and that the metal-ion uptake falls in the order: Tb 3þ . Gd 3þ . Sm 3þ . Nd 3þ . La 3þ .

Sorption properties of the iminodiacetate ion exchange resin, amberlite IRC‐718, toward divalent metal ions

“…The stability of the chelate is expected to be less favorable for ions of larger size; this is consistent with earlier investigations. [37][38][39] pH dependence of the metal-ion uptake…”

Preparation of a New Polystyrene Supported-Ethylenediaminediacetic Acid Resin and its Sorption Behavior toward Divalent Metal Ions

“…In this article, and in connection with our recent work on the synthesis and sorption properties of chelate-forming polymers, [1,3,6,[11][12][13][14][15][16] we report on the synthesis and characterization of a new polystyrene supported-ethylenediaminediacetic acid resin. In addition, the chelation properties of the new resin towards the divalent metal ions, Cu 2+ , Zn 2+ , Ni 2+ , and Pb 2+ , in aqueous solutions under different experimental conditions of contact time, pH, mass of resin, concentration of metal ions, and polymer mass were conducted and the results of the investigation are discussed.…”

Resin‐V: Synthesis and physicochemical studies of a biphenol–guanidine–formaldehyde terpolymer resin

“…5,6 Many terpolymers derived from phenol derivatives have been found to posses selective chelating ion-exchange properties. [7][8][9] The phenol aminoformaldehyde resin Yarrezin B, usually used for the extraction of ions of heavy nonferrous metals (zinc, lead, copper, cadmium, etc. ), is produced in the Russian Federation.…”