Adsorption of Cd2+ and Cu2+ ions from aqueous solutions by a cross-linked polysulfonate–carboxylate resin

Haladu, Shamsuddeen A.; Hamouz, Othman Charles S. Al; Ali, Shaikh A.

doi:10.1016/j.arabjc.2015.04.028

Cited by 9 publications

(3 citation statements)

References 33 publications

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“…Materials 2024, 17, x FOR PEER REVIEW 9 of 18 shoulder at 2853 cm −1 near the peak at 2873 cm −1 , related to symmetric stretching of methylene [80,81]. Lastly, the range 1160-1040 cm −1 (orange framework, Figure 4) is presented since, according to Jiang et al [71], it is representative of the S-O fingerprint but can also be attributed to C-O stretching [82] and, therefore, could be indicative of the oxidation state, the degree of disulfide bond cleavage in the samples, and the interaction between SO3 − and Cu 2+ [83,84]. In Figure 5 and Table 1, the thermal analysis results are reported.…”

Section: Compositional and Physical-chemical Characterizationmentioning

confidence: 90%

“…Lastly, the range 1160-1040 cm −1 (orange framework, Figure 4) is presented since, according to Jiang et al [71], it is representative of the S-O fingerprint but can also be attributed to C-O stretching [82] and, therefore, could be indicative of the oxidation state, the degree of disulfide bond cleavage in the samples, and the interaction between SO 3 − and Cu 2+ [83,84].…”

Section: Compositional and Physical-chemical Characterizationmentioning

confidence: 98%

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Keratin/Copper Complex Electrospun Nanofibers for Antibacterial Treatments: Property Investigation and In Vitro Response

Tummino,

Cruz-Maya,

Varesano

et al. 2024

Materials

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The frontiers of antibacterial materials in the biomedical field are constantly evolving since infectious diseases are a continuous threat to human health. In this work, waste-wool-derived keratin electrospun nanofibers were blended with copper by an optimized impregnation procedure to fabricate antibacterial membranes with intrinsic biological activity, excellent degradability and good cytocompatibility. The keratin/copper complex electrospun nanofibers were multi-analytically characterized and the main differences in their physical–chemical features were related to the crosslinking effect caused by Cu2+. Indeed, copper ions modified the thermal profiles, improving the thermal stability (evaluated by differential scanning calorimetry and thermogravimetry), and changed the infrared vibrational features (determined by infrared spectroscopy) and the chemical composition (studied by an X-ray energy-dispersive spectroscopy probe and optical emission spectrometry). The copper impregnation process also affected the morphology, leading to partial nanofiber swelling, as evidenced by scanning electron microscopy analyses. Then, the membranes were successfully tested as antibacterial materials against gram-negative bacteria, Escherichia coli. Regarding cytocompatibility, in vitro assays performed with L929 cells showed good levels of cell adhesion and proliferation (XTT assay), and no significant cytotoxic effect, in comparison to bare keratin nanofibers. Given these results, the material described in this work can be suitable for use as antibiotic-free fibers for skin wound dressing or membranes for guided tissue regeneration.

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Section: Compositional and Physical-chemical Characterizationmentioning

confidence: 90%

Section: Compositional and Physical-chemical Characterizationmentioning

confidence: 98%

Keratin/Copper Complex Electrospun Nanofibers for Antibacterial Treatments: Property Investigation and In Vitro Response

Tummino,

Cruz-Maya,

Varesano

et al. 2024

Materials

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“…Layered Double Hydroxide (LDH)based materials have gained interest recently due to its photocatalytic capabilities (Azalok et al, 2021;Gholami et al, 2020). Ca/Fe-LDH-Na Alginate (Abed and Faisal, 2023), Mg-Al-LDH/AC nanocomposite (Asadpour et al, 2023), and NiCoMn-LDH (Devi et al, 2023) have been mentioned as photocatalysts in the TC degradation. LDH holds a two-dimensional structure constructed from laminated materials.…”

Section: Introductionmentioning

confidence: 99%

ZnAl LDH-based Derivative Materials as Photocatalysts: Synthesis, Characterization, and Catalytic Performance in Tetracycline Degradation

Rohmatullaili,

Ahmad,

Erviana

et al. 2024

Sci. Technol. Indones

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Layered Double Hydroxide (LDH)-derived materials exhibited different characteristics from LDH precursors. The conversion of ZnAl LDH into its derivative material has been carried out to find the best catalyst for TC degradation. ZnAl (LDH)-based catalysts in this study have been effectively synthesized using coprecipitation, calcination, and restacking procedures. ZnAl Layered Double Oxide (LDO) is derived from the calcination of ZnAl LDH at 500°C. ZnAl LDH was also modified by adding Garcinia mangostana pericarp extract (GME). XRD, FT-IR, UV-DRS, and SEM-EDX were used to investigate the synthesized catalyst. ZnAl LDH exhibited the typical LDH FT-IR spectra, whereas ZnAl LDO showed metal oxide-like spectra, and the ZnAl-GME composite displayed the combination spectra of precursor material. The ZnAl LDH XRD diffraction pattern exhibited the attributes of a layered material, whereas the other three catalysts did not. Calcination destroyed the layered structure of ZnAl LDH, whereas the addition of GME to LDH and LDO generated a single-layered composite. The modified ZnAl-GME composite showed a decrease in both particle size and bandgap energy. At an ideal pH of 5, the synthesized catalyst was used in a batch system photodegradation of 5 mg/L Tetracycline (TC), employing solar light irradiation. ZnAl LDO holds the most significant catalytic activity and structural stability through the fifth regeneration cycle, degraded TC up to 100% in 90 minutes.

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Removal of Cu(II) from acid leach solution of electronic waste utilizing magnetic activated carbon derivatized with α‐benzoinoxime: alternate mining source

Iqbal

Jan

Shah

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND: Copper plays a leading role in the electronics industry. Drastic innovation and fast obsolescence rate raise the demand for copper for electrical and electronic equipment. The high amount of electronic waste discarded is considered the primary alternative source and is now seen as a secondary reservoir for copper metal. Besides the economic impact, copper interferes with selective recovery of other metals such as critical, precious and rare earth elements from electronic waste. RESULTS: In this work, to purify acid leach solution of electronic waste from Cu(II) ions, a selective sorbent was synthesized. A Cu(II) specified ligand, ⊍-benzoinoxime, was impregnated with magnetic nanoparticle-modified activated carbon and utilized as magnetic solid-phase sorbent. The synthesized sorbent was analysed for its morphological and other characteristic properties.CONCLUSION: The study indicates that percent recovery increased from 89% to >95% after impregnation. Complexation between Cu(II) and ⊍-benzoinoxime-modified activated carbon caused the sorbent to attain higher retention at pH > 8.5. Sorption capacity calculated from Langmuir sorption isotherm was 147 mg g −1 , while the sorption process follows a pseudo-second-order kinetic model. The sorbed Cu(II) was quantitatively (>97%) eluted with 1 mol L −1 nitric acid. The method was validated with standard reference material GF10928752-Aldrich. Results show that the synthesized sorbent is good for Cu(II) masking and recovery, even if applied to samples with a complex sample matrix.

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Adsorption of Cd2+ and Cu2+ ions from aqueous solutions by a cross-linked polysulfonate–carboxylate resin

Cited by 9 publications

References 33 publications

Keratin/Copper Complex Electrospun Nanofibers for Antibacterial Treatments: Property Investigation and In Vitro Response

Keratin/Copper Complex Electrospun Nanofibers for Antibacterial Treatments: Property Investigation and In Vitro Response

ZnAl LDH-based Derivative Materials as Photocatalysts: Synthesis, Characterization, and Catalytic Performance in Tetracycline Degradation

Removal of Cu(II) from acid leach solution of electronic waste utilizing magnetic activated carbon derivatized with α‐benzoinoxime: alternate mining source

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