Linear and crosslinked copolymers of vinylamine with vinyl pyrrolidone or methyl methacrylate. chelation of copper

Janus, Ludovic; Morcellet, Joëlle; Delporte, Michèle; Morcellet, Michel

doi:10.1016/0014-3057(92)90205-g

Cited by 26 publications

(11 citation statements)

References 13 publications

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“…Shambhu et al24 immobilized polyamines (i.e., EDA, diethylene triamine, and triethylene tetramine) onto polystyrene and reached an adsorption value of 519 μmol Cu(II)/g polymer. Janus et al25 used poly(vinyl amine) sorbent for copper adsorption and reported an adsorption capacity of 7.9 μmol Cu(II)/g. Denizli et al26 used Alkali Blue 6B‐attached P(EGDMA‐HEMA) sorbents, in which the maximum adsorption capacities were 36.2 μmol Cu(II)/g, 49.1 μmol Cd(II)/g, and 618 μmol Pb(II)/g.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of magnetic polymethylmethacrylate microbeads carrying ethylene diamine for removal of Cu(II), Cd(II), Pb(II), and Hg(II) from aqueous solutions

Deni̇zli̇

zkan

Arıca

2000

J. Appl. Polym. Sci.

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Magnetic polymethylmethacrylate (mPMMA) microbeads carrying ethylene diamine (EDA) were prepared for the removal of heavy metal ions (i.e., copper, lead, cadmium, and mercury) from aqueous solutions containing different amount of these ions (5–700 mg/L) and at different pH values (2.0–8.0). Adsorption of heavy metal ions on the unmodified mPMMA microbeads was very low (3.6 μmol/g for Cu(II), 4.2 μmol/g for Pb(II), 4.6 μmol/g for Cd(II), and 2.9 μmol/g for Hg(II)). EDA‐incorporation significantly increased the heavy metal adsorption (201 μmol/g for Cu(II), 186 μmol/g for Pb(II), 162 μmol/g for Cd(II), and 150 μmol/g for Hg(II)). Competitive adsorption capacities (in the case of adsorption from mixture) were determined to be 79.8 μmol/g for Cu(II), 58.7 μmol/g for Pb(II), 52.4 μmol/g for Cd(II), and 45.3 μmol/g for Hg(II). The observed affinity order in adsorption was found to be Cu(II) > Pb(II) > Cd(II) > Hg(II) for both under noncompetitive and competitive conditions. The adsorption of heavy metal ions increased with increasing pH and reached a plateau value at around pH 5.0. The optimal pH range for heavy‐metal removal was shown to be from 5.0 to 8.0. Desorption of heavy‐metal ions was achieved using 0.1 M HNO3. The maximum elution value was as high as 98%. These microbeads are suitable for repeated use for more than five adsorption‐desorption cycles without considerable loss of adsorption capacity. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 81–89, 2000

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Section: Resultsmentioning

confidence: 99%

Preparation and characterization of magnetic polymethylmethacrylate microbeads carrying ethylene diamine for removal of Cu(II), Cd(II), Pb(II), and Hg(II) from aqueous solutions

Deni̇zli̇

zkan

Arıca

2000

J. Appl. Polym. Sci.

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“…Hydrothermal reaction (Fig. 1a,b) was used to prepare PVA-coated copper nanowires templates [11][12][13][14][15]29 . The copper source was CuCl (0.1 g, 1 mmol) mixed with an aqueous PVA solution (6 wt.…”

Section: Methodsmentioning

confidence: 99%

“…1a,b) to prepare PVA-coated copper nanowires templates [11][12][13][14][15] , following an annealing process that subsequently converts the copper nanowires into Cu-Cu 2 O-C coaxial structures (Fig. 1c, Supplementary Figs S1 and S2).…”

Section: Synthesis and Characterization Of Cu-cu 2 O-c Coaxial Nanowimentioning

confidence: 99%

Anomalous high capacitance in a coaxial single nanowire capacitor

et al. 2012

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Building entire multiple-component devices on single nanowires is a promising strategy for miniaturizing electronic applications. Here we demonstrate a single nanowire capacitor with a coaxial asymmetric Cu-Cu 2 o-C structure, fabricated using a two-step chemical reaction and vapour deposition method. The capacitance measured from a single nanowire device corresponds to ~140 µF cm − 2 , exceeding previous reported values for metal-insulator-metal micro-capacitors and is more than one order of magnitude higher than what is predicted by classical electrostatics. Quantum mechanical calculations indicate that this unusually high capacitance may be attributed to a negative quantum capacitance of the dielectric-metal interface, enhanced significantly at the nanoscale.

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“…The hard base amino side group in poly(vinylamine) is a proton acceptor and proton donor, 59 and it forms complexes with acid side groups in ethylene/acrylic-acid copolymers. 60 Janus et al 61 have used poly(vinylamine) and linear copolymers of vinylamine with vinylpyrrolidone or methyl methacrylate to form complexes with Cu 2ϩ . Poly(ethylene imine), PEI, is water-soluble with a solid density of 1.15 g/cc, as measured in toluene.…”

Section: Polymersmentioning

confidence: 99%