Fe<sup>2+</sup> and Fe<sup>3+</sup> adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers

Rabelo, D.; Silva, V. J.; Alcântara, Edésio F.C.; Faria, Lourival C. de; Martins, Gesley Alex Veloso; Garg, V. K.; Oliveira, A. C.; Morais, P.C.

doi:10.1002/app.12605

Cited by 6 publications

(2 citation statements)

References 52 publications

(90 reference statements)

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“…Although PAN polymers have cyano groups that are able to form complexes with metal ions, the strong interactions between cyano groups reduce the swelling in aqueous media and the hydrophilicity of porous polymer surface [41]. This is probably the reason that cyano-containing polymers have not been extensively used in metal sorption from aqueous solutions without chemical modification [42]. However, the AO AN/MA copolymer beads have good adsorption capability for Hg 2+ , Ag + and Cu 2+ , especially for Hg 2+ after modified with NH 2 OH·HCl.…”

Section: Pore Structure Analysismentioning

confidence: 98%

Synthesis of porous acrylonitrile/methyl acrylate copolymer beads by suspended emulsion polymerization and their adsorption properties after amidoximation

Liu

Hou

Wang

et al. 2010

Journal of Hazardous Materials

105

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Section: Pore Structure Analysismentioning

confidence: 98%

Synthesis of porous acrylonitrile/methyl acrylate copolymer beads by suspended emulsion polymerization and their adsorption properties after amidoximation

Liu

Hou

Wang

et al. 2010

Journal of Hazardous Materials

105

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“…There are many types of adsorbents, including activated carbon 13–15. Auki et al16 reported the use of activated carbon for Cr +6 removal (up to 98%) and recovery in electrochemical plants.…”

Section: Introductionmentioning

confidence: 99%

Production of macroporous resins for heavy‐metal removal. I. Nonfunctionalized polymers

Ortíz-Palacios

Cardoso

Manero

2007

J of Applied Polymer Sci

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The aim of this work was the synthesis of macroporous resins with large specific surface areas through the use of organic solvents (known as porogens or pore-forming agents) for applications in hexavalent chromium (Cr 16 ) removal operations. The synthesis of these materials by suspension polymerization allowed the generation of macroporous structures. The comonomers 4-vinylpyridine and divinylbenzene were considered in different ratios. Poly(vinyl alcohol) was used as a suspension agent in a mixture of toluene and hexane. The materials produced were characterized with Fourier transform infrared spectroscopy, elemental analysis, thermogravimetry, nitrogen adsorption, and scanning electron microscopy. The macroporous resin with the largest surface area (130 m 2 /g) was thermally stable up to 3008C and had a structure that included spherical domains with a mean diameter of 68 lm, uniform porosity, and expected high sorption capability. The sorption properties of the resins were evaluated for applications in water-treatment operations to eliminate Cr 16 ions at a pH near 7. The advantages of these materials were their high removal capability, high selectivity, and fast adsorption kinetics at a pH 6.5. An aqueous solution of 4 ppm K 2 Cr 2 O 7 was used to quantify the Cr 16 content by ultraviolet-visible spectroscopy. A remarkable sorption level (94%) of chromate ions (Cr 16 ) was obtained during a 15-h period for the resin with the highest pyridine group content.

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Hydrothermal Synthesis of Melamine-Functionalized Covalent Organic Polymer-Blended Alginate Beads for Iron Removal from Water

Periyasamy

Viswanathan

2019

J. Chem. Eng. Data

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The present study aimed to utilize the advantages of the porous covalent organic frameworks (COFs) by synthesizing in a usable bead form with alginate using hydrothermal method. The melamine-rich covalent organic polymer/alginate (MCOP−Alg) composite beads were utilized for iron removal. The maximum adsorption capacity of MCOP−Alg composite beads was achieved as 53.89 mg g −1 . The synthesized MCOP−Alg composite beads were characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis with mapping analysis, Fourier transform infrared, and Brunauer−Emmett−Teller studies. The various adsorption experiments such as contact time, solution pH, competing ions, and temperature have been optimized successfully for iron removal. The equilibrium result was demonstrated with Freundlich, Langmuir, and Dubinin−Radushkevich (D−R) isotherms. The thermodynamic result indicates the endothermic and spontaneous nature. The iron adsorption mechanism follows surface complexation with electrostatic attraction and ion-exchange. Fe(II)-adsorbed MCOP−Alg composite beads could be easily regenerated using 0.5 M HCl. The field study of MCOP−Alg composite beads was also examined.

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Fe²⁺ and Fe³⁺ adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers

Cited by 6 publications

References 52 publications

Synthesis of porous acrylonitrile/methyl acrylate copolymer beads by suspended emulsion polymerization and their adsorption properties after amidoximation

Synthesis of porous acrylonitrile/methyl acrylate copolymer beads by suspended emulsion polymerization and their adsorption properties after amidoximation

Production of macroporous resins for heavy‐metal removal. I. Nonfunctionalized polymers

Hydrothermal Synthesis of Melamine-Functionalized Covalent Organic Polymer-Blended Alginate Beads for Iron Removal from Water

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Fe2+ and Fe3+ adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers

Cited by 6 publications

References 52 publications

Synthesis of porous acrylonitrile/methyl acrylate copolymer beads by suspended emulsion polymerization and their adsorption properties after amidoximation

Synthesis of porous acrylonitrile/methyl acrylate copolymer beads by suspended emulsion polymerization and their adsorption properties after amidoximation

Production of macroporous resins for heavy‐metal removal. I. Nonfunctionalized polymers

Hydrothermal Synthesis of Melamine-Functionalized Covalent Organic Polymer-Blended Alginate Beads for Iron Removal from Water

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Product

Resources

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Fe²⁺ and Fe³⁺ adsorption on 2‐vinylpyridine–divinylbenzene copolymers and acrylonitrile–methyl methacrylate–divinylbenzene terpolymers