Liquid-phase polymer-based retention, a new method for separation and preconcentration of elements

Geckeler, Kurt E.; Bayer, Ernst; Spivakov, B. Ya.; Shkinev, V. M.; Vorob'eva, G. A.

doi:10.1016/s0003-2670(00)83731-9

Cited by 97 publications

(51 citation statements)

References 9 publications

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“…Application in the recovery of metals from diluted solutions both in analytical and technical scale has been reported. 17 However, no study of the influence of different variables in the retention properties has yet been done.…”

Section: Introductionmentioning

confidence: 99%

Poly(sodium 4-styrenesulfonate)-metal ion interactions

Rivas

Moreno‐Villoslada

1998

J. Appl. Polym. Sci.

126

170

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ABSTRACT:The metal ion-binding properties of poly(sodium 4-styrenesulfonate) in conjunction with membrane filtration were investigated for Cu(II), Cd(II), Co(II), Cr(III), Hg(II), Ni(II), Pb(II), Zn(II), and Fe(II). Different experiments were carried out at different pH's, metal ion concentrations, polymer concentrations, and molecular weight fractions. Only Fe(II) and Cr(III) were retained at pH 1, which allows a selective separation of these metals from all the other metal ions. At pH 3 the retention ability of this polymer increased for all the metal ions. On the other hand, the metal ionretention properties are dependent on the polymer/metal ratio.

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Section: Introductionmentioning

confidence: 99%

Poly(sodium 4-styrenesulfonate)-metal ion interactions

Rivas

Moreno‐Villoslada

1998

J. Appl. Polym. Sci.

126

170

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“…Metal ion retention using the liquid-phase polymerbased retention (LPR) technique 19 was carried out prior to synthesizing the polymer-metal complexes. Retained were polymers that had a polymer fraction greater than 100,000 Da for the following metal ions: Ag(I), Hg(II), Cd(II), Cu(II), Ni(II), Zn(II), and Co(II) at pH 1, 3, 5, and 7.…”

Section: Obtaining Polymer-metal Complexesmentioning

confidence: 99%

Water‐soluble cationic polymers and their polymer–metal complexes with biocidal activity: A genotoxicity study

Rivas

Pereira

Mondaca

et al. 2002

J of Applied Polymer Sci

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Water-soluble polyelectrolytes containing ammonium and sulfonic groups, their polymer-Ag(I) complexes, and silver nitrate were investigated as bactericidal compounds for Staphylococcus aureus (Collection No. ATCC 28922) and Escherichia coli (Collection No. 6538P) according to the National Committee for Clinical Laboratory Standards (NCCL) method. All the compounds, except Ag(I), showed bactericidal activity only for S. aureus. Ag(I) showed high bactericidal activity for both bacteria. No important effect of the molecular weight or macromolecular size on the maximum bactericidal concentration value was observed. The genotoxicity was studied using the rec assay. None of the macromolecular compounds showed genotoxicity, except silver ions, whose value was borderline. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: [452][453][454][455][456][457] 2003

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“…After the ampules were cooled and opened, the copolymers were dissolved in deionized water and purified by ultrafiltration using a conventional membrane filtration system. 12 The retentate solutions were concentrated in vacuo and then freeze-dried. The experimental data are summarized in Table I.…”

Section: Copolymerization Proceduresmentioning

confidence: 99%

Synthesis and Properties of Hydrophilic Polymers I. Preparation and Metal Complexation of Poly(4-vinylpyridine-co-N-allylthiourea)

Geckeler

1993

Polym J

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ABSTRACT:Copolymers of 4-vinylpyridine and N-allylthiourea with different mole fractions were synthesized by radical copolymerization in bulk. The AIBN-initiated copolymerization was found to strongly favor the 4-vinylpyridine monomer in the copolymer composition. This was confirmed by viscosity measurements with a linear relationship between the reduced viscosity and the comonomer content. Interactions and complexation of the water-soluble copolymers with nine metal ions were investigated in aqueous solution by means of a membrane filtration technique. This technique is designed to remove and separate metal ions from diluted solutions by binding them to soluble polymers. The effects of several parameters, such as copolymer composition, filtration factor, and pH were studied as a function of the interaction of the copolymers with metal ions. A strong selectivity for copper(Il) was found which was pronounced at a monomer ratio of I: 2 (4-vinylpyridine: N-allylthiourea). Also a partial interaction of iron(III) and the copolymer (2: 1) was observed at pH 3 which was strongly pH-dependent.KEY WORDS N-Allylthiourea / Aqueous Solution / Copolymerization / Metal Complexation / 4-Vinylpyridine / Hydrophilic polymers represent an important class of polymeric materials due to their salient properties and their great spectrum of practical applications. A number of different polymer structures can provide the desired properties of materials with respect to the application purpose. 1 · 2 A hydrophilic character of the polymer and compatibility with many polar solvents are especially suitable that can be attained by introducing solubilizing constitutional repeat units by copolymerization. Among these, pyridine groups play an essential role by reason of the chemical functionality of such materials as well as the commercial availability of the corresponding monomers. affinity of pyridines as monomeric and polymeric derivatives is well-known. 4 Poly(4-vinylpyridine)s have been also investigated in terms of their metal complexing behavior. 5 • 6 Nishide and Tsuchida investigated the selective adsorption of metal ions on resins based on 4-vinylpyridine. 7 In that study, fixed coordination sites were produced using a template technique with 1,4-bromobutane as crosslinking agent. Additionally, another study showed that the incorporation of pyridine moieties has an enhancing effect on the stability of metal complexes. 8 However, very few studies focus on the properties of poly(4-vinylpyridine)s and copolymers in aqueous solution. 2 • 9 Fundamental studies on the homopolymerization and copolymerization of the 4-vinylpyridine monomer have been the subject of a number of studies. 3 The metal binding Previously, N-allylthiourea copolymers with acrylic acid were reported and studied as macromolecular complexing agents. 10 In more detail, the influence of the thiourea ligand on 115

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Liquid-phase polymer-based retention, a new method for separation and preconcentration of elements

Cited by 97 publications

References 9 publications

Poly(sodium 4-styrenesulfonate)-metal ion interactions

Poly(sodium 4-styrenesulfonate)-metal ion interactions

Water‐soluble cationic polymers and their polymer–metal complexes with biocidal activity: A genotoxicity study

Synthesis and Properties of Hydrophilic Polymers I. Preparation and Metal Complexation of Poly(4-vinylpyridine-co-N-allylthiourea)

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