Synthesis of potent chitosan beads a suitable alternative for textile dye reduction in sunlight

Khan, Adnan; Shah, Syed Jamal; Mehmood, Karishma; Awais,; Ali, Nauman; Khan, Hamayun

doi:10.1007/s10854-018-0305-5

Cited by 54 publications

(17 citation statements)

References 53 publications

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“…The CH 3 symmetrical deformation was seen at 1419 cm −1 . The stretching vibrations for the C-O bond had emerged at 1076 cm −1 of the β-glycosidic bond amongst carbon 1 and 4 [32]. The chemically altered chitosan spectra (CH-AN) with thiocarbamate showed the same bands along with appearance of a new band at 2255 cm −1 , which is accredited to C≡N bond [33].…”

Section: Infrared Spectroscopymentioning

confidence: 98%

Chitosan-Based Bio-Composite Modified with Thiocarbamate Moiety for Decontamination of Cations from the Aqueous Media

et al. 2020

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Herein, we report the development of chitosan (CH)-based bio-composite modified with acrylonitrile (AN) in the presence of carbon disulfide. The current work aimed to increase the Lewis basic centers on the polymeric backbone using single-step three-components (chitosan, carbon disulfide, and acrylonitrile) reaction. For a said purpose, the thiocarbamate moiety was attached to the pendant functional amine (NH2) of chitosan. Both the pristine CH and modified CH-AN bio-composites were first characterized using numerous analytical and imaging techniques, including 13C-NMR (solid-form), Fourier-transform infrared spectroscopy (FTIR), elemental investigation, thermogravimetric analysis, and scanning electron microscopy (SEM). Finally, the modified bio-composite (CH-AN) was deployed for the decontamination of cations from the aqueous media. The sorption ability of the CH-AN bio-composite was evaluated by applying it to lead and copper-containing aqueous solution. The chitosan-based CH-AN bio-composite exhibited greater sorption capacity for lead (2.54 mmol g−1) and copper (2.02 mmol g−1) than precursor chitosan from aqueous solution based on Langmuir sorption isotherm. The experimental findings fitted better to Langmuir model than Temkin and Freundlich isotherms using linear regression method. Different linearization of Langmuir model showed different error functions and isothermal parameters. The nonlinear regression analysis showed lower values of error functions as compared with linear regression analysis. The chitosan with thiocarbamate group is an outstanding material for the decontamination of toxic elements from the aqueous environment.

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Section: Infrared Spectroscopymentioning

confidence: 98%

Chitosan-Based Bio-Composite Modified with Thiocarbamate Moiety for Decontamination of Cations from the Aqueous Media

et al. 2020

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“…Biopolymers can completely decontaminate metal ions from industrial effluents. The class of said biopolymers subsumes cellulose, chitin, chitosan, lignins, alginate, and carrageens [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…After cellulose, chitin is considered the most abundant natural polymer obtained from the arthropod's exoskeleton, mostly crabs (Malacostraca) and insects (Insecta) [25]. Chitosan is a linear polysaccharide and deacetylated derivative of chitin [24]. It has been intensively applied in food industries, biomedical, biotechnological, pharmaceutical, cosmetics, agricultural, and water treatment [26].…”

Section: Introductionmentioning

confidence: 99%

“…It has been intensively applied in food industries, biomedical, biotechnological, pharmaceutical, cosmetics, agricultural, and water treatment [26]. Chitosan is biocompatible, environmentally friendly, antibacterial, and biodegradable; it also demonstrates high sorption capacity toward metal ions because of the chemical composition of amino and hydroxyl groups [24,27]. The degree of deacetylation is the main controlling factor for sorption capacity [28]; it also affects the properties of chitosan, which are mainly physical, chemical, and biological.…”

Section: Introductionmentioning

confidence: 99%

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Engineering Functionalized Chitosan-Based Sorbent Material: Characterization and Sorption of Toxic Elements

et al. 2019

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The present study reports the engineering of functionalized chitosan (CH)-based biosorbent material. Herein, a two-step reaction was performed to chemically modify the CH using 1,4-bis(3-aminopropyl) piperazine to incorporate nitrogen basic centers for cations sorption from the aqueous environment. The resultant functionalized chitosan-based sorbent material was designated as CH-ANP and characterized using various analytical techniques, including elemental analysis, Fourier-transform infrared spectroscopy (FTIR), 13C NMR (in solid-state), X-ray diffraction, and thermal analysis. Then, the newly engineered CH-ANP was employed for the removal of copper, lead, and cadmium in the aqueous medium. Langmuir sorption isotherm analysis revealed that the highest sorption abilities achieved were 2.82, 1.96, and 1.60 mmol g−1 for copper, cadmium, and lead, respectively. Linear and nonlinear regression methods were deployed on the sorption data to study the behavior of the Langmuir, the Freundlich, and the Temkin sorption isotherms. Among the four different forms, the Langmuir isotherm type 1 fit well to the experimental data as compared to the other models. It also showed the lowest values of error, and a higher correlation coefficient than the Freundlich and Temkin models; thus it was the best fit with the experimental data compared to the latter two models. In conclusion, the findings suggest that chemically modified novel materials with enhanced Lewis basic centers are useful and promising candidates for the sorption of various toxic cations in aqueous solution.

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“…Copper sulde (CuS) materials are of interest due to their dynamic applications in cancer therapy, [1][2][3] environmental remediation, [4][5][6] and energy harnessing devices. [7][8][9] These p-type semiconductor materials have a narrow band gap, which allows for efficient use of visible light for photocatalytic reactions as compared to TiO 2 , SrTiO 3 , and ZnO that require UV light.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic strategies to produce catalytically reactive CuS nanodisks

et al. 2019

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Synthesis of potent chitosan beads a suitable alternative for textile dye reduction in sunlight

Cited by 54 publications

References 53 publications

Chitosan-Based Bio-Composite Modified with Thiocarbamate Moiety for Decontamination of Cations from the Aqueous Media

Chitosan-Based Bio-Composite Modified with Thiocarbamate Moiety for Decontamination of Cations from the Aqueous Media

Engineering Functionalized Chitosan-Based Sorbent Material: Characterization and Sorption of Toxic Elements

Biomimetic strategies to produce catalytically reactive CuS nanodisks

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