Development of poly(1-vinylimidazole)-chitosan composite sorbent under microwave irradiation for enhanced uptake of Cd(II) ions from aqueous media

Ayub, Asif; Irfan, Ayesha; Raza, Zulfiqar Ali; Abbas, Mazhar; Ali, Muhammad; Ahmad, Khalil; Munwar, Alisha

doi:10.1007/s00289-020-03523-7

Cited by 30 publications

(11 citation statements)

References 31 publications

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“…In Figure 5b, there has been a transition from this perforated view to a spiral view. This is due to the spherical appearance of polyvinyl imidazole, as is frequently seen in the literature 45,46 . Allylisothiocyanate, which tends to join the polymer chains more with the extension of the polymerization time, caused a morphological change in the SEM image.…”

Section: Resultssupporting

confidence: 51%

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Synthesis of a new adsorbent poly(allylisothiocyanate‐co‐hydroxyethylmethacrylate‐co‐vinylimidazole) via photopolymerization: Characterization and investigation of heavy metal adsorption capacity

Saltan

2022

J of Applied Polymer Sci

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We report the copolymerization synthesis of novel poly(allylisothiocyanate‐co‐hydroxyethylmethacrylate‐co‐vinylimidazole) (PAHV) adsorbents for potential applications in the heavy metal removals. In the present study, the copolymerization reaction was introduced by photopolymerization using benzophenone as the photoinitiator. The chemical structure in the PAHV adsorbents was monitored and evaluated by Fourier transform infrared spectroscopy, 1H‐nuclear magnetic resonance, andX‐ray photoelectron spectroscopy measurements. Surface analysis and molecular weight distribution of PAHV adsorbents were performed by scanning electron microscopy and gel permeation chromatography analysis, respectively. The adsorption method, which is one of the most effective techniques, was used for the elimination of heavy metal ions from aqueous solutions in this study. In order to understand the adsorption capacity and removal efficiency of heavy metal ions by PAHV, the effects of pH value and monomer ratio in the adsorbents were investigated. Inductively coupled plasma mass spectrometry device was used for these analyses. The optimum pH values for adsorption capacity and removal efficiency of heavy metal ions have been 6–8. The removal efficiency of heavy metal ions by the various PAHV adsorbents decreased in the order: Cd2+ > Pb2+ > Co3+ > Cr3+ > Ni2+ > Cu2+.

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Section: Resultssupporting

confidence: 51%

“…This is due to the spherical appearance of polyvinyl imidazole, as is frequently seen in the literature. 45,46 Allylisothiocyanate, which tends to join the polymer chains more with the extension of the polymerization time, caused a morphological change in the SEM image. Figure 5f shows a more planar and compact structure.…”

Section: Ftir Analysesmentioning

confidence: 99%

Synthesis of a new adsorbent poly(allylisothiocyanate‐co‐hydroxyethylmethacrylate‐co‐vinylimidazole) via photopolymerization: Characterization and investigation of heavy metal adsorption capacity

Saltan

2022

J of Applied Polymer Sci

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“…The kinetic data indicates that, Ze/L/AC absorbs contaminants faster than Ze/AC possibly due to the larger pore size of Ze/AC, as indicated in our surface area study. Based on the previous studies, the well fitted pseudo-second-order indicated that chemisorption was involved 56 – 66 .…”

Section: Resultsmentioning

confidence: 86%

Synthesis of a novel multifunctional organic–inorganic nanocomposite for metal ions and organic dye removals

Elmekawy

Quach

Abdel‐Fattah

2023

Sci Rep

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In this study, we used solvent assisted mechano-synthesis strategies to form multifunctional organic–inorganic nanocomposites capable of removing both organic and inorganic contaminants. A zeolite X (Ze) and activated carbon (AC) composite was synthesized via state-of-the-art mechanical mixing in the presence of few drops of water to form Ze/AC. The second composite (Ze/L/AC) was synthesized in a similar fashion, however this composite had the addition of disodium terephthalate as a linker. Both materials, Ze/AC and Ze/L/AC, were characterized using scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), Powdered X-ray diffraction (P-XRD), Fourier-transform infrared spectrometry (FTIR), Accelerated Surface Area and Porosimetry System (ASAP), and thermal gravimetric analysis (TGA). The SEM–EDS displayed the surface structure and composition of each material. The sodium, oxygen and carbon contents increased after linker connected Ze and AC. The P-XRD confirmed the crystallinity of each material as well as the composites, while FTIR indicated the function groups (C=C, O–H) in Ze/L/AC. The contaminant adsorption experiments investigated the effects of pH, temperature, and ionic strength on the adsorption of methylene blue (MB) and Co(II) for each material. In MB adsorption, the first-order reaction rate of Ze/L/AC (0.02 h−1) was double that of Ze/AC (0.01 h−1). The reaction rate of Ze/L/AC (4.8 h−1) was also extraordinarily higher than that of Ze/AC (0.6 h−1) in the adsorption of Co(II). Ze/L/AC composite achieved a maximum adsorption capacity of 44.8 mg/g for MB and 66.6 mg/g for Co(II) ions. The MB adsorption of Ze/AC and Ze/L/AC was best fit in Freundlich model with R2 of 0.96 and 0.97, respectively, which indicated the multilayer adsorption. In the Co(II) adsorption, the data was highly fit in Langmuir model with R2 of 0.94 and 0.92 which indicated the monolayer adsorption. These results indicated both materials exhibited chemisorption. The activation energy of Ze/L/AC in MB adsorption (34.9 kJ mol−1) was higher than that of Ze/L/AC in Co (II) adsorption (26 kJ mol−1).

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“…The population growth and increased demand for consumer goods, associated with inefficient waste management, have led to the accumulation of pollutants in water resources [ 1 ]. This is very worrying because recent research estimates that by 2050 around 65% of Earth’s population will face a shortage of drinking water [ 2 ]. Among the anthropic activities that generate waste, intense industrial activity has stood out for releasing recalcitrant compounds, such as dyes and herbicides, which pose risks to the ecosystem and human health [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Photoresponsive Activity of the Zn0.94Er0.02Cr0.04O Compound with Hemisphere-like Structure Obtained by Co-Precipitation

et al. 2023

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In this work, a ZnO hemisphere-like structure co-doped with Er and Cr was obtained by the co-precipitation method for photocatalytic applications. The dopant’s effect on the ZnO lattice was investigated using X-ray diffraction, Raman, photoluminescence, UV-Vis and scanning electron microscopy/energy dispersive spectroscopy techniques. The photocatalytic response of the material was analyzed using methylene blue (MB) as the model pollutant under UV irradiation. The wurtzite structure of the Zn0.94Er0.02Cr0.04O compound presented distortions in the lattice due to the difference between the ionic radii of the Cr3+, Er3+ and Zn2+ cations. Oxygen vacancy defects were predominant, and the energy competition of the dopants interfered in the band gap energy of the material. In the photocatalytic test, the MB degradation rate was 42.3%. However, using optimized H2O2 concentration, the dye removal capacity reached 90.1%. Inhibitor tests showed that •OH radicals were the main species involved in MB degradation that occurred without the formation of toxic intermediates, as demonstrated in the ecotoxicity assays in Artemia salina. In short, the co-doping with Er and Cr proved to be an efficient strategy to obtain new materials for environmental remediation.

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Development of poly(1-vinylimidazole)-chitosan composite sorbent under microwave irradiation for enhanced uptake of Cd(II) ions from aqueous media

Cited by 30 publications

References 31 publications

Synthesis of a new adsorbent poly(allylisothiocyanate‐co‐hydroxyethylmethacrylate‐co‐vinylimidazole) via photopolymerization: Characterization and investigation of heavy metal adsorption capacity

Synthesis of a new adsorbent poly(allylisothiocyanate‐co‐hydroxyethylmethacrylate‐co‐vinylimidazole) via photopolymerization: Characterization and investigation of heavy metal adsorption capacity

Synthesis of a novel multifunctional organic–inorganic nanocomposite for metal ions and organic dye removals

Photoresponsive Activity of the Zn0.94Er0.02Cr0.04O Compound with Hemisphere-like Structure Obtained by Co-Precipitation

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