Enhancement of adsorption of Congo red dye onto novel antimicrobial trimellitic anhydride isothiocyanate-cross-linked chitosan hydrogels

Mohamed, Nadia A.; Al‐Harby, Nouf F.; Almarshed, Mawaheb S.

doi:10.1007/s00289-019-03058-6

Cited by 27 publications

(27 citation statements)

References 46 publications

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“…The encapsulation of chitosan might decrease the Cu leach out from the PU surface. Also, it enhances the sorption ability of dyes and heavy metal ions as well as antibacterial activity 35 , 36 . Moreover, interconnecting pores might be beneficial for higher adsorption loading of contaminants, discuss later in the manuscript.…”

Section: Resultsmentioning

confidence: 99%

Three-dimensional (3D) polymer—metal–carbon framework for efficient removal of chemical and biological contaminants

Sasidharan

Sachan

Chauhan

et al. 2021

Sci Rep

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The continuously increased existence of contaminants such as chemical and biological mainly dye, bacteria, and heavy metals ions (HMI) in water bodies has increased environmental concern due to their hostile effects on living things. Therefore, there is necessity to be developed newer materials that skirmishes such environmental menace. The present works focus on the synthesis of a novel three-dimensional (3D) polymer-metal–carbon (3D-PMC) framework for the exclusion of contaminants (chemical and biological) from water bodies. Initially, polyurethane (PU) foam was treated with nitric acid and used as a framework for the development of 3D-PMC materials. The copper nanosheet (Cu-NS) was deposited onto the functionalized PU foam to produce Cu-NS-PU material. The mechanically exfoliated graphene was mixed with chitosan to produce a graphene-chitosan homogenous suspension. The produce homogenous suspension was deposited Cu-NS-PU for the development of the 3D-PMC framework. The prepared 3D-PMC framework was characterized by scanning electron microscopy (SEM), Energy Dispersive X-Ray Analysis (EDX), Fourier-transform infrared spectroscopy (FT-IR), and X-rays diffraction (XRD) analysis. The prepared 3D-PMC framework was subjected to various adsorption parameters to assess the sorption ability of the material. The prepared 3D-PMC framework was effectively used for the removal of chromium (Cr) metal ions and Congo-red (CR) dye from the water system. The synthesis of the 3D-PMC framework is simple, novel, cost-effective, and economically viable. Therefore, the prepared 3D-PMC framework has the potential to be used as a filter assembly in water treatment technologies.

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Section: Resultsmentioning

confidence: 99%

Three-dimensional (3D) polymer—metal–carbon framework for efficient removal of chemical and biological contaminants

Sasidharan

Sachan

Chauhan

et al. 2021

Sci Rep

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“…The slope and intercept of the linear plot of t/q against t yielded the values of q e and k 2 , respectively [23].…”

Section: Pseudo-second-order Model (Ho and Mckay Model)mentioning

confidence: 99%

Kinetics, Isotherm and Thermodynamic Studies for Efficient Adsorption of Congo Red Dye from Aqueous Solution onto Novel Cyanoguanidine-Modified Chitosan Adsorbent

2021

Self Cite

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Novel Cyanoguanidine-modified chitosan (CCs) adsorbent was successfully prepared via a four-step procedure; first by protection of the amino groups of chitosan, second by insertion of epoxide rings, third by opening the latter with cyanoguanidine, and fourth by restoring the amino groups through elimination of the protection. Its structure and morphology were checked using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The adsorption capacity of CCs for Congo Red (CR) dye was studied under various conditions. It decreased significantly with the increase in the solution pH value and dye concentration, while it increased with increasing temperature. The adsorption fitted to the pseudo-second order kinetic model and Elovich model. The intraparticle diffusion model showed that the adsorption involved a multi-step process. The isotherm of CR dye adsorption by CCs conforms to the Langmuir isotherm model, indicating the monolayer nature of adsorption. The maximum monolayer coverage capacity, qmax, was 666.67 mg g−1. Studying the thermodynamic showed that the adsorption was endothermic as illustrated from the positive value of enthalpy (34.49 kJ mol−1). According to the values of ΔG°, the adsorption process was spontaneous at all selected temperatures. The value of ΔS° showed an increase in randomness for the adsorption process. The value of activation energy was 2.47 kJ mol−1. The desorption percentage reached to 58% after 5 cycles. This proved that CCs is an efficient and a promising adsorbent for the removal of CR dye from its aqueous solution.

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“…The encapsulation of chitosan might decrease the Cu leach out from the PU surface. Also, it enhances the sorption ability of dyes and heavy metal ions as well as antibacterial activity 29,30 . Moreover, interconnecting pores might be beneficial for higher adsorption loading of contaminants, discuss later in the manuscript.…”

Section: Materials Characterizationmentioning

confidence: 99%

Novel Three-Dimensional (3D) Carbon-Metal-Polymeric framework: Efficient removal of Chemical and Biological Contaminants

Venkataramanan

Sachan

Chauhan

et al. 2021

Preprint

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The continuously increasing existence of contaminants such as chemical and biological mainly dye, bacteria, and heavy metals ions in water bodies has increased environmental concern due to their hostile effects on living things. Therefore, it the necessity to be developing newer material that skirmishes such environmental menace. The present works focus on the synthesis of a novel three-dimensional (3D) polymer-metal-carbon (3D-PMC) framework for the exclusion of contaminants (chemical and biological) from water bodies. Initially, polyurethane (PU) foam was treated with nitric acid and used as a scaffold for the development of 3D-PMC. The copper nanosheet (Cu-NS) were deposited on to the functionalized PU foam to produce Cu-NS-PU material. The mechanically exfoliated graphene and mixed with chitosan to produce a graphene-chitosan homogenous suspension. The produce homogenous suspension was deposited Cu-NS-PU for the development of the 3D-PMC framework. The prepared 3D-PMC framework was characterized by scanning electron microscopy (SEM), Energy Dispersive X-Ray Analysis (EDX), Fourier-transform infrared spectroscopy (FT-IR), and X-rays diffraction (XRD) analysis. The prepared 3D-PMC framework was subjected to various adsorption parameters to assess the sorption ability of the material. The prepared 3D-PMC framework was effectively used for the removal of chromium (Cr) metal ions and Congo-red (CR) dye from the water system. The synthesis of the 3D-PMC framework is simple, novel, cost-effective, and economically viable. Therefore, the prepared 3D-PMC framework has the potential to be used as a filter assembly in water treatment technologies.

show abstract

Enhancement of adsorption of Congo red dye onto novel antimicrobial trimellitic anhydride isothiocyanate-cross-linked chitosan hydrogels

Cited by 27 publications

References 46 publications

Three-dimensional (3D) polymer—metal–carbon framework for efficient removal of chemical and biological contaminants

Three-dimensional (3D) polymer—metal–carbon framework for efficient removal of chemical and biological contaminants

Kinetics, Isotherm and Thermodynamic Studies for Efficient Adsorption of Congo Red Dye from Aqueous Solution onto Novel Cyanoguanidine-Modified Chitosan Adsorbent

Novel Three-Dimensional (3D) Carbon-Metal-Polymeric framework: Efficient removal of Chemical and Biological Contaminants

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