Characteristics of binding of metal ions with polymeric ligands

Polinskii, A.S.; Pshezhetskii, V.S.; Kabanov, V.A.

doi:10.1016/0032-3950(83)90380-5

Cited by 14 publications

(4 citation statements)

References 8 publications

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“…Indeed, the validity of the model is limited by the assumption about the independence of the reactivity of the polymer's functional groups bounded to the metal ion. In fact, groups combined with the polymer chain may not behave independently, which is, for example, illustrated by the difference between the local concentration of polymer units and the mean concentration in solution [37]. In fact, the macromolecular charge is changed during complexation, consequently, a reorganization of the macromolecular conformation occurs, indicated by a change in viscosity of the system [31,35].…”

Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

“…In fact, the macromolecular charge is changed during complexation, consequently, a reorganization of the macromolecular conformation occurs, indicated by a change in viscosity of the system [31,35]. Simultaneously, the acid-base properties of the polymer are changed [32,37] and therefore the properties of the macromolecular ligand are changed as a whole.…”

Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

“…The model described above is one of the two principal different models applied in the study of polymeric features of the complexing process. Its limitation explains the use of the other important model in numerous works reported in the literature [37,38]. In this other model, the macromolecule is considered as a matrix with a certain number of perfectly defined binding sites.…”

Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

“…Thus, neither one nor the other of the two models considered will permit a strict description of complexing with linear synthetic polyligands. Indeed, the applicability of the first or the second model depends on the degree of conformity of the assumptions to reality [37] and each of the two models will have, for long time, their fervent believers and also their not less fervent detractors.…”

Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

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Removal of Metal Ions from Aqueous Solutions by Complexation –Ultrafiltration Hybrid Process: A Bibliographical Overview

Mimoune¹,

Belazzougui²,

Benaboura³

2014

J. Memb. Separ. Tech.

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Water pollution by metal ions contaminants is a worldwide alarming problem. Clean and safe water is becoming in the same time an increasing scare resource. Thus, to keep this fundamental resource available and suitable for use, water treatment methods are investigated by means of numerous research studies since the purification of water and its re-use and, in a larger scale, the environmental protection will be essential henceforth in any strategy of development. Membrane processes, in general, and ultrafiltration, in particular, develop, without stopping, since the beginning of the sixties to meet the vital need for environmental safety which justifies the policies of durable development adopted today all over the world. Thanks to its growing, ultrafiltration becomes an irreplaceable weapon in the control of pollution. It is classified as a soft and clean technology since it needs low energy consumption and ensures a notable reduction in pollution production during the treatment step. Ultrafiltration is a pressure driven membrane process with the ability to separate molecules in solution on the basis of size. A microporous ultfafiltration membrane retains species with molecular weight higher than its cut off, while small molecules as solvents and microsolutes can pass freely through it. Thus, metal ions aren't rejected by ultrafiters. However, ultrafiltration can be used to remove metal ions from aqueous solutions by coupling the process with complexation. Indeed, the complexation of metal ions using water soluble polymers as substrates is able to expand artificially the size of the metallic species so as to make possible their rejection by the microporous ultrafilters. The complexation-ultrafiltration hybrid process was first suggested at the end of the sixties by A. S. Michaels. Since then, many studies have shown its effectiveness in the treatment of aqueous solutions containing metal ions. This paper gives an overview of academic studies that illustrate and demonstrate the efficiency and the promising of the hybrid process in the purification of water from metal ions contaminants beforehand sequestered by adequate watersoluble macromolecular substrates.

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Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

Section: Ii22 the Macrocomplex Formationmentioning

confidence: 99%

See 2 more Smart Citations

Removal of Metal Ions from Aqueous Solutions by Complexation –Ultrafiltration Hybrid Process: A Bibliographical Overview

Mimoune¹,

Belazzougui²,

Benaboura³

2014

J. Memb. Separ. Tech.

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Interactions of polymer backbones and complexation of polychelatogens with methylthiourea ligands in aqueous solution

Geckeler¹,

Shkinev

Spivakov

1987

Angew. Makromol. Chem.

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The interactions of the polymeric backbone and complex formation with a series of metals were investigated for poly(ethyleneimine), poly(vinylpyrrolidinone), and poly-(acrylamide) as basis polymers with methylthiourea as ligand. Retention studies by application of membrane filtration of aqueous solutions were used for the evaluation of interaction between the metal ions and macromolecules as function of pH. It was shown for the Na, Co, Ni, Cu, Zn, Cd, Hg, Fe ions that the interaction depends both on the type of polymer backbone and the pH.Whereas for poly(ethy1eneimine)-based copolymers the retention data were influenced only slightly by pH, the two other copolymers investigated showed a strong pH dependency for the individual metals. A dominating effect of the functional ligand comonomer in terms of the interaction over the basis monomer was observed for the majority of metal ions investigated. ZUSAMMENFASSUNG:Die Wechselwirkungen des Polymergertists und die Komplexbildung mit einer Reihe von Schwermetallen wurde fiir die Methylthioharnstoff als Liganden tragenden Basispolymeren Poly(ethylenimin), Poly(viny1pyrrolidinon) und Poly(acry1amid) in Abhbgigkeit vom pH-Wert untersucht.Retentionsstudien in wilssriger LBsung unter Verwendung von Membranfiltration wurden zur Bewertung der Wechselwirkungen zwischen Metallionen und Makromolekiilen in Abhangigkeit vom pH-Wert herangezogen. Es wurde fiir die Ionen Na, Co, Ni, Cu, Zn, Cd, Hg, Fe gezeigt, daJ3 die Wechselwirkung sowohl von der Art des Po-lymergeriists als auch vom pH abhilngt. Wlhrend die Retentionswerte von Copolymeren auf der Basis von Poly(ethy1enimin) nur schwach vom pH beeinflunt wurden, zeigten die beiden anderen untersuchten Copolymeren eine starke Abhlngigkeit fur die einzelnen Metalle. Es wurde eine vorherrschende Wirkung des funktionellen Liganden-Comonomeren hinsichtlich der Wechselwirkung im Vergleich zum Basismonomeren fur den grbnten Teil der untersuchten Metallionen gefunden.

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1,2,4-Triazoles as Ligands for Iron(II) High Spin ↔ Low Spin Crossovers

Haasnoot

1996

Magnetism: A Supramolecular Function

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Characteristics of binding of metal ions with polymeric ligands

Cited by 14 publications

References 8 publications

Removal of Metal Ions from Aqueous Solutions by Complexation –Ultrafiltration Hybrid Process: A Bibliographical Overview

Removal of Metal Ions from Aqueous Solutions by Complexation –Ultrafiltration Hybrid Process: A Bibliographical Overview

Interactions of polymer backbones and complexation of polychelatogens with methylthiourea ligands in aqueous solution

1,2,4-Triazoles as Ligands for Iron(II) High Spin ↔ Low Spin Crossovers

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