Facile preparation of methionine-functionalized graphene oxide/chitosan polymer nanocomposite aerogel for the efficient removal of dyes and metal ions from aqueous solutions

Yadav, Sushma; Asthana, Anupama; Singh, Ajaya Kumar; Patel, Jyoti; Sreevidya, S.; Carabineiro, Sónia A.C.

doi:10.1016/j.enmm.2022.100743

Cited by 8 publications

(1 citation statement)

References 67 publications

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“…Scanning electron microscopy of these beads, the synthetic solution in the sample, and the control showed that they were hollow from the inside (having smooth inner walls). In SEM/EDS analysis of the Ca-alginate beads after the experiment, void spaces of the beads were found to be filled with precipitates of heavy metals, showing that Ca-alginate beads can be successfully used as a biosorbent for the removal of uranium, which agreed with 11 – 14 . Analysis revealed that the carboxyl and amino groups were responsible for metal binding Negatively charged and easily accessible carboxyl groups are essential for the binding of metal captions 12 – 15 .…”

Section: Resultsmentioning

confidence: 52%

Prediction of heavy metal biosorption mechanism through studying isotherm kinetic equations

Fadl

2023

Sci Rep

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The kinetic constants for free and immobilized cells were determined by measuring reaction rates at different metal concentrations at the optimum reaction conditions. (Kmax and Vmax) were calculated from the slope and intercept of the straight lines. The pseudo-second-order rate constants are derived based on the sorption capacity of the solid phase, where K2 is the rate constant for the pseudo-second-order model. Determined experimentally by plotting t/q against t. The mean free vitality of adsorption (E) was figured as 2.62 kJ mol−1 and the extent of E communicated gives data on the adsorption mechanism. An E value ranging from 1 to 8 indicates physisorption and 8–16 kJ mol−1 predicts ion exchange. Thus, the evaluated value of 2.62 kJ mol−1 predicts the phenomenon of physisorption, which suggests that metal ions were favorably adsorbed by this biosorbent in a multi-layer fashion. The overall result suggested that 98.2% of U (VI) by biosorption of U in the mechanism of adsorption will include chemisorption mechanistic pathway: Langmuir, Freundlich, equations and the values of Kf 5.791 where KL 3.9 were determined from the linear plot of log qe vs. log Ce at 30 °C, indicating that metal ions were favorably adsorbed by this biosorbent in a multi-layer fashion and instrumentation of beads characterizing novel Binding sites using FTIR & SEM beside change in peaks position which assigned for its groups confirm biosorption of metal.

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Section: Resultsmentioning

confidence: 52%

Prediction of heavy metal biosorption mechanism through studying isotherm kinetic equations

Fadl

2023

Sci Rep

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Iodine‐Functionalized Magnetic Reduced Graphene Oxide as an Efficient Nanocatalyst for Acetylation of Phenol, Alcohol, and Sugar Derivatives

Roudsari

Sadjadi

2023

ChemistrySelect

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Here in this study, a new iodine-modified magnetic nanocomposite (I@rGO@CoFe 2 O 4 ) has been described. FT-IR, XRD, SEM, TEM, EDX, TGA, and VSM techniques confirm the construction of I@rGO@CoFe 2 O 4 nanocomposite and show ferromagnetic properties with a significant magnetization saturation (35.9 emu g À 1 ). A deep eutectic solvent (DES) potassium triiodide-choline chloride (KI 3 : ChCl) has been used as a reducing agent and for modification of magnetic graphene oxide sheets. In addition, the applicability of the nanocomposite has been well demonstrated for acetylation of some phenol, alcohol, and sugar derivatives in solvent-free conditions at room temperature. Increasing catalytic activity, high selectivity, reducing environmental hazards, and reusing the catalyst without significantly reducing activity are among the advantages of this method.

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Efficient Decontamination of Cationic Dyes from Synthetic Textile Wastewater Using Poly(acrylic acid) Composite Containing Amino Functionalized Biochar: A Mechanism Kinetic and Isotherm Study

et al. 2022

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Facile preparation of methionine-functionalized graphene oxide/chitosan polymer nanocomposite aerogel for the efficient removal of dyes and metal ions from aqueous solutions

Cited by 8 publications

References 67 publications

Prediction of heavy metal biosorption mechanism through studying isotherm kinetic equations

Prediction of heavy metal biosorption mechanism through studying isotherm kinetic equations

Iodine‐Functionalized Magnetic Reduced Graphene Oxide as an Efficient Nanocatalyst for Acetylation of Phenol, Alcohol, and Sugar Derivatives

Efficient Decontamination of Cationic Dyes from Synthetic Textile Wastewater Using Poly(acrylic acid) Composite Containing Amino Functionalized Biochar: A Mechanism Kinetic and Isotherm Study

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