Removal of copper ions using poly (acrylic acid-co-acrylamide) hydrogel microspheres with controllable size prepared by W/O Pickering emulsions

Yuan, Songbai; Ning, Kegong; He, Yongjun

doi:10.1007/s00396-020-04715-3

Cited by 10 publications

(2 citation statements)

References 39 publications

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“…The Cu(II) ion adsorption performance of template-removed PCA-APT was compared with those of other reported materials, as listed in Table . It is discovered that the adsorption property of PCA-APT-4 was superior to most of the materials, including hydrogels, resins, polymer particles, − silicas , and chitosan membranes in recent years.…”

Section: Resultsmentioning

confidence: 99%

Facile “One-Pot” Fabrication of Dual-Functional Anisotropic Particles via Dispersion Polymerization for Adsorption of Copper Ions

Zhang,

Tang,

et al. 2024

ACS Appl. Polym. Mater.

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The pollution of water by heavy metal ions poses a serious threat to human beings and ecosystems. Here, we report "one-pot" preparation of bifunctional anisotropic particles for the removal of Cu(II) ions from water. By introducing an asymmetric cross-linker that has uneven reactivity of polymerization, the regulation of anisotropic polymeric particle morphologies on a larger scale of the cross-linker content (within 10−40%) could be accomplished. Through the regulation of composition and conditions, a series of particles with different morphologies were acquired, including Staphylococcus aureus-like and concaved structures. In addition, the electron-rich vinyl groups from asymmetric cross-linkers could be retained from the polymerization; therefore, the acquired particles possessed both vinyl and epoxy functional groups that can be easily functionalized. Furthermore, penicillamine was modified by either epoxy-amine ring-opening or a thiol−ene "click" reaction onto the anisotropic particles for the removal of Cu(II) ions. Surprisingly, it was also discovered that the removal of the linear template by organic solvents could significantly improve the adsorption capacity, with an adsorption amount as high as 531.0 mg/g.

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Section: Resultsmentioning

confidence: 99%

Facile “One-Pot” Fabrication of Dual-Functional Anisotropic Particles via Dispersion Polymerization for Adsorption of Copper Ions

Zhang,

Tang,

et al. 2024

ACS Appl. Polym. Mater.

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“…PVA-based hydrogel as carrier can provide a uniform system for aniline polymerization, effectively improve the problem of easy agglomeration of aniline polymerization, and improve its mechanical strength and processability.Composite hydrogel is an excellent adsorbent for removing Cr (VI), which has the dual advantages of hydrogel and conductive polymer(RiahiSamani et al, 2016). Emulsion polymerization is one of the ideal strategies to obtain porous hydrogels, but the traditional surfactant-stabilized emulsion often has the disadvantages of foaming, high toxicity and high cost(Yuan et al, 2020). Pickering emulsion has many advantages, such as strong coalescence resistance, good long-term stability, good biocompatibility and adjustable properties, which make it an excellent template for producing various porous hydrogels(Hussein et al, 2019;Teo et al, 2022).…”

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confidence: 99%

Sorption enhancement of Cr(VI) from aqueous solution by polyaniline confined in three-dimensional network of composite porous hydrogel

Zhang

Zou

et al. 2023

Environ Sci Pollut Res

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Hexavalent chromium Cr(VI) is a typical harmful pollutant, which is carcinogenic or mutagenic to aquatic animals and humans. In this study, sepiolite/humic acid/polyvinyl alcohol@ polyaniline (SC/HA/PVA@PANI) composite porous hydrogel adsorbent was synthesized by Pickering emulsion template-in situ chemical oxidative polymerization for adsorption of Cr(VI) from aqueous solution. The insitu polymerization of aniline at the Pickering emulsion interface and the unique three-dimensional network structure of the hydrogel act as an effective "con nement" for the growth of the polymer. The porous structure of the material acts as a water channel, which effectively accelerates the binding of the adsorbate to the adsorption sites, and signi cantly improves the adsorption rate and adsorption capacity.The adsorption capacity of PANI for Cr(VI) con ned in three-dimensional network of composite porous SC/HA/PVA@PANI hydrogel reached 1180.97 mg/g-PANI, which increased about 27-fold compared the adsorption capacity of pure PANI (43.48 mg/g). It is shown that the experimental design effectively avoids the agglomeration of PANI and improves its potential adsorption performance. In addition, the analysis of FESEM-EDX, FT-IR and XPS spectra before and after adsorption con rmed that the main adsorption mechanisms of Cr(VI) on SC/HA/PVA@PANI included ion exchange, electrostatic attraction and redox reaction. In conclusion, SC/HA/PVA@PANI has good stability and excellent adsorption performance, which is a new type of Cr(VI) ion adsorbent with great potential. HighlightsA novel porous hydrogel adsorbent SC/HA/PVA@PANI was prepared for Cr(VI) removal.The in-situ polymerization of aniline on the Pickering emulsion interface and the "con nement" effect of the hydrogel's unique three-dimensional network structure on the polymer can effectively avoid the agglomeration of polyaniline and exert its potential adsorption e ciency.The porous structure of the material acts as a water channel, which effectively accelerates the combination of the adsorbate and adsorption site to improve the adsorption rate and capacity. The adsorption mechanism of Cr(VI) mainly includes electrostatic action, chemical reduction and ion exchange.

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Kinetic and Equilibrium Function and Switchable Catalytic Activity of Some Thermo-Responsive Hydrogel Metal Absorbents Based on Modified PNIPAM

2023

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Removal of copper ions using poly (acrylic acid-co-acrylamide) hydrogel microspheres with controllable size prepared by W/O Pickering emulsions

Cited by 10 publications

References 39 publications

Facile “One-Pot” Fabrication of Dual-Functional Anisotropic Particles via Dispersion Polymerization for Adsorption of Copper Ions

Facile “One-Pot” Fabrication of Dual-Functional Anisotropic Particles via Dispersion Polymerization for Adsorption of Copper Ions

Sorption enhancement of Cr(VI) from aqueous solution by polyaniline confined in three-dimensional network of composite porous hydrogel

Kinetic and Equilibrium Function and Switchable Catalytic Activity of Some Thermo-Responsive Hydrogel Metal Absorbents Based on Modified PNIPAM

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