Simple fabrication of Chitosan/Graphene nanoplates composite spheres for efficient adsorption of acid dyes from aqueous solution

Zhang, Conglu; Chen, Zezhi; Guo, Wei; Zhu, Chengwu; Zou, Yonggen

doi:10.1016/j.ijbiomac.2018.02.074

Cited by 77 publications

(31 citation statements)

References 35 publications

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“…With the advancements in material chemistry, the focus has been shifted towards the development of cost-effective adsorbents from readily available and cheap natural resources such as fruit peel, rice husks, wheat straw, coconut and coffee waste, shells, mud, sugarcane bagasse, peat, agriculture, and domestic waste [59,60]. These wastes, along with fruit peel and other organic waste, are converted into cost-effective adsorbents through treatment with different chemical substances or drying and modifying them accordingly [61,62]. With advancements in analytical and technical approaches, wastewater treatment using organic waste is gaining much more attention (Table 2).…”

Section: Organic Adsorbents For Wastewater Treatmentmentioning

confidence: 99%

Current and Emerging Adsorbent Technologies for Wastewater Treatment: Trends, Limitations, and Environmental Implications

Younas

Mustafa

Farooqi

et al. 2021

Water

162

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Wastewater generation and treatment is an ever-increasing concern in the current century due to increased urbanization and industrialization. To tackle the situation of increasing environmental hazards, numerous wastewater treatment approaches are used—i.e., physical, chemical, and biological (primary to tertiary treatment) methods. Various treatment techniques being used have the risks of producing secondary pollutants. The most promising technique is the use of different materials as adsorbents that have a higher efficacy in treating wastewater, with a minimal production of secondary pollutants. Biosorption is a key process that is highly efficient and cost-effective. This method majorly uses the adsorption process/mechanism for toxicant removal from wastewater. This review elaborates the major agricultural and non-agricultural materials-based sorbents that have been used with their possible mechanisms of pollutant removal. Moreover, this creates a better understanding of how the efficacy of these sorbents can be enhanced by modification or treatments with other substances. This review also explains the re-usability and mechanisms of the used adsorbents and/or their disposal in a safe and environmentally friendly way, along with highlighting the major research gaps and potential future research directions. Additionally, the cost benefit ratio of adsorbents is elucidated.

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Section: Organic Adsorbents For Wastewater Treatmentmentioning

confidence: 99%

Current and Emerging Adsorbent Technologies for Wastewater Treatment: Trends, Limitations, and Environmental Implications

Younas

Mustafa

Farooqi

et al. 2021

Water

162

View full text Add to dashboard Cite

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“…On the other hand, anionic species bound to the -NH 3 + groups can be desorbed with an increase in pH as the -NH 3 + is converted to -NH 2 and the now negatively generated -COOgroups will favour desorption of the anions. Indeed, solutions of NaOH have been employed to desorb anionic species such as chromate [180] and methyl orange [242], while HCl solutions have been employed to desorb divalent cations such as Pb(II) [175] and Cd(II) [243]. Organic solvents such as methanol have been employed in the desorption of ciprofloxacin [176] and acetone has been used to desorb methyl violet and Alizarin yellow R [92].…”

Section: Regeneration Strategiesmentioning

confidence: 99%

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

et al. 2021

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Graphene and its derivatives, especially graphene oxide (GO), are attracting considerable interest in the fabrication of new adsorbents that have the potential to remove various pollutants that have escaped into the aquatic environment. Herein, the development of GO/chitosan (GO/CS) composites as adsorbent materials is described and reviewed. This combination is interesting as the addition of graphene to chitosan enhances its mechanical properties, while the chitosan hydrogel serves as an immobilization matrix for graphene. Following a brief description of both graphene and chitosan as independent adsorbent materials, the emerging GO/CS composites are introduced. The additional materials that have been added to the GO/CS composites, including magnetic iron oxides, chelating agents, cyclodextrins, additional adsorbents and polymeric blends, are then described and discussed. The performance of these materials in the removal of heavy metal ions, dyes and other organic molecules are discussed followed by the introduction of strategies employed in the regeneration of the GO/CS adsorbents. It is clear that, while some challenges exist, including cost, regeneration and selectivity in the adsorption process, the GO/CS composites are emerging as promising adsorbent materials.

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“…Due to their advantageous adsorption properties, biopolymer-based graphene adsorbents were also developed with various biopolymers. Recently, chitosan spheres cross-linked graphene nanoplates (CS/GNPs) were prepared and applied in the efficient removal of methyl orange (MO) and AR1 anionic dye from wastewater [86]. The electrostatic interactions between dye molecules and amino groups of chitosan along with p-p interactions between the benzene ring of graphene and p-e electrons of dye molecules were considered responsible in the elimination of dye molecules from wastewater.…”

Section: Graphenementioning

confidence: 99%

Carbon Nanomaterials for Wastewater Treatment

et al. 2021

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The research progress made in recent years in removal of organic-inorganic pollutants from wastewater using various types of carbon materials as adsorbents such as carbon nanotubes, carbon nanofibers, graphenes, graphitic carbon nitride, fullerene, activated carbon spheres, and carbon quantum dots is reviewed. These carbon nanomaterials with hierarchical structures are efficient and economical adsorbents. The techniques of metal impregnation and doping help to control the porosity and surface area of nanomaterials. Electrostatic forces, p-p and p-e interactions, van der Waals weak forces, and oxygen-containing groups are considered responsible for the removal of pollutants from wastewater. The carbon nanomaterial-based photocatalysts are applied successfully in decomposition of persistent dyes under visible light. Fe 3 O 4 magnetic material is employed as recyclable adsorbent after treatment of wastewater. Freundlich and Langmuir models are found more suitable to calculate the adsorption efficiency and adsorption kinetics of pollutants. Criteria and properties of carbon nanomaterials are discussed that might play a significant role in remediation of wastewater.

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Simple fabrication of Chitosan/Graphene nanoplates composite spheres for efficient adsorption of acid dyes from aqueous solution

Cited by 77 publications

References 35 publications

Current and Emerging Adsorbent Technologies for Wastewater Treatment: Trends, Limitations, and Environmental Implications

Current and Emerging Adsorbent Technologies for Wastewater Treatment: Trends, Limitations, and Environmental Implications

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

Carbon Nanomaterials for Wastewater Treatment

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