Adsorption of Congo red from solution using chitosan modified carbon nanotubes

Yang, Runping Han Mengmeng; Du, Yangyang; Li, Mingyu; Han, Runping

doi:10.5004/dwt.2019.24125

Cited by 9 publications

(1 citation statement)

References 35 publications

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“…Similar to that employed in the formation of CS/GO, the CS/CNTs are formed by initially dissolving the chitosan in acetic acid, then the CNTs are added, dispersed and normally a crosslinking agent, such as glutaraldehyde [ 215 ], is used. These CS/CNT composites have been employed as adsorbents and used in the removal of Cr(VI) [ 234 ], V(V), Cr(VI), Cu(II), As(V) and Ag(I) from biological and environmental samples [ 235 ], Cu(II) [ 236 ], U(VI) [ 237 ], Pb(II) [ 238 ], phosphate [ 239 ], phenol [ 60 ], fluoride [ 58 ], diazinon [ 240 ], food dyes [ 241 ] and dyes [ 242 ].…”

Section: Chitosan Supportsmentioning

confidence: 99%

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

et al. 2021

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The quality of water is continuously under threat as increasing concentrations of pollutants escape into the aquatic environment. However, these issues can be alleviated by adsorbing pollutants onto adsorbents. Chitosan and its composites are attracting considerable interest as environmentally acceptable adsorbents and have the potential to remove many of these contaminants. In this review the development of chitosan-based adsorbents is described and discussed. Following a short introduction to the extraction of chitin from seafood wastes, followed by its conversion to chitosan, the properties of chitosan are described. Then, the emerging chitosan/carbon-based materials, including magnetic chitosan and chitosan combined with graphene oxide, carbon nanotubes, biochar, and activated carbon and also chitosan-silica composites are introduced. The applications of these materials in the removal of various heavy metal ions, including Cr(VI), Pb(II), Cd(II), Cu(II), and different cationic and anionic dyes, phenol and other organic molecules, such as antibiotics, are reviewed, compared and discussed. Adsorption isotherms and adsorption kinetics are then highlighted and followed by details on the mechanisms of adsorption and the role of the chitosan and the carbon or silica supports. Based on the reviewed papers, it is clear, that while some challenges remain, chitosan-based materials are emerging as promising adsorbents.

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Section: Chitosan Supportsmentioning

confidence: 99%

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

et al. 2021

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Synthesis of PVA–MWCNTs–UMCNOs–starch crosslinked nanocomposite biodegradable films for the removal of methylene blue and Congo red dyes from wastewater

Dwivedi,

Rathore,

Srivastava

et al. 2024

J of Applied Polymer Sci

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Plastic waste and wastewater are indeed significant environmental issues that have wide‐ranging impacts on ecosystems, human health, and the economy. This study outlines the synthesis of biodegradable polyvinyl alcohol (PVA)–starch polymeric films incorporating multiwalled carbon nanotubes (MWCNTs) derived from plastic waste and unzipped carbon nanotubes oxides (UMCNOs) as co‐filled nanomaterials. These films were formulated based on data generated using a mixture design method in Design Expert 13 software, resulting in the synthesis of 19 films utilizing five types of PVA–starch polymer solutions (Types A–E). The synthesized films underwent characterization to study their surface morphology via scanning electron microscope and Fourier transform infrared spectroscopy analysis. Subsequently, the films were individually subjected to vacuum filtration, through which cationic dyes such as methylene blue (MB) and anionic dye Congo red (CR) were passed in batches. The highest removal efficiency of 96.43% for MB dye was achieved, accompanied by an exceptionally high flux of 3146.78 LMH. Similarly, the maximum removal of 88.08% for CR was observed with a flux of 1512.66 LMH. The renewable active sites mechanism resulted in increased dye removal with every cycle. Results indicated efficient reusability, particularly when washed with ethanol–water solution.

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Efficient Removal of Organic and Inorganic Pollutants from Water Using Fe₃O₄@SiO₂@CS@EDTA Nanocomposite: Optimization via Response Surface Methodology (RSM)

Ebrahimzadeh,

Baramakeh

2024

ChemistrySelect

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The elimination of pollution from wastewater holds significant value, especially when targeting colored and heavy metals originating from industrial activities. This study aims to optimize the degradation of both organic and inorganic pollutants in water by utilizing Fe3O4@SiO2@CS@EDTA (NCM@EDTA) core‐shell nanocomposite adsorbents. The NCM@EDTA adsorbents were synthesized in a step‐by‐step process and characterized using various techniques. Field emission scanning electron microscopy (FESEM) revealed an increase in average size to 137 nm, and transmission electron microscopy (TEM) confirmed the presence of a core‐shell structure. Additional characterization techniques included XRD, XPS, FT‐IR, EDX, BET analysis, and VSM, establishing the presence of functional groups, elemental analysis, and magnetic properties. Optimization of pollutant removal was conducted using response surface methodology (RSM), considering factors such as NCM@EDTA amount, reaction time, and temperature. Under optimized conditions, significant removal efficiency for Congo red, Safranin, and Cu2+ – representing cationic, anionic, and inorganic pollutants – was observed. The adequacy of the models was evaluated using p‐Value, F‐value, adjusted R2, and correlation coefficient (R2) for every pollutant, indicating a strong agreement between experimental data and predicted values. Additionally, the process of adsorbent recycling was studied, revealing that the internal structure remains unchanged throughout the removal and recovery process.

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Adsorption of Congo red from solution using chitosan modified carbon nanotubes

Cited by 9 publications

References 35 publications

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

Synthesis of PVA–MWCNTs–UMCNOs–starch crosslinked nanocomposite biodegradable films for the removal of methylene blue and Congo red dyes from wastewater

Efficient Removal of Organic and Inorganic Pollutants from Water Using Fe₃O₄@SiO₂@CS@EDTA Nanocomposite: Optimization via Response Surface Methodology (RSM)

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Adsorption of Congo red from solution using chitosan modified carbon nanotubes

Cited by 9 publications

References 35 publications

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

Synthesis of PVA–MWCNTs–UMCNOs–starch crosslinked nanocomposite biodegradable films for the removal of methylene blue and Congo red dyes from wastewater

Efficient Removal of Organic and Inorganic Pollutants from Water Using Fe3O4@SiO2@CS@EDTA Nanocomposite: Optimization via Response Surface Methodology (RSM)

Contact Info

Product

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Efficient Removal of Organic and Inorganic Pollutants from Water Using Fe₃O₄@SiO₂@CS@EDTA Nanocomposite: Optimization via Response Surface Methodology (RSM)