Chitosan-Functionalized-Graphene Oxide (GO@CS) Beads as an Effective Adsorbent to Remove Cationic Dye from Wastewater

Nayl, A.A.; Abd-Elhamid, Ahmed I.; Arafa, Wael A. A.; Ahmed, Ismail; El-Shanshory, Ahmed A.; Abu‐Saied, M. A.; Soliman, Hesham M. A.; Abdelgawad, Mohamed A.; Ali, Hazim M.; Bräse, Stefan

doi:10.3390/polym14194236

Cited by 23 publications

(10 citation statements)

References 41 publications

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“…Similar sets of analyses were carried out by other published research also [52][53][54][55][56][57][58][59]. This fact sustains the high significance of providing a careful, rigorous, and complete characterization of the new synthesized hydrogels, all the more so as it provides the necessary information to conduct the experiments regarding the adsorption of emergent pollutants (dyes included) from water in such a manner that in the adequate conditions, the decontamination process can be carried out efficiently and at low costs.…”

Section: Synthesis and Charaterization Of Hydrogels Based On Chitosan...supporting

confidence: 71%

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Grigoraș,

Simion,

Drob

2024

Gels

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Water is one of the fundamental resources for the existence of humans and the environment. Throughout time, due to urbanization, expanding population, increased agricultural production, and intense industrialization, significant pollution with persistent contaminants has been noted, placing the water quality in danger. As a consequence, different procedures and various technologies have been tested and used in order to ensure that water sources are safe for use. The adsorption process is often considered for wastewater treatment due to its straightforward design, low investment cost, availability, avoidance of additional chemicals, lack of undesirable byproducts, and demonstrated significant efficacious potential for treating and eliminating organic contaminants. To accomplish its application, the need to develop innovative materials has become an essential goal. In this context, an overview of recent advances in hydrogels based on chitosan and nanocomposites and their application for the depollution of wastewater contaminated with dyes is reported herein. The present review focuses on (i) the challenges raised by the synthesis process and characterization of the different hydrogels; (ii) the discussion of the impact of the main parameters affecting the adsorption process; (iii) the understanding of the adsorption isotherms, kinetics, and thermodynamic behavior; and (iv) the examination of the possibility of recycling and reusing the hydrogels.

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Section: Synthesis and Charaterization Of Hydrogels Based On Chitosan...supporting

confidence: 71%

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Grigoraș,

Simion,

Drob

2024

Gels

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“…The capacities towards MB obtained in the present study are compared to other adsorbents based on GO reported in the literature (Table 4) [28,[34][35][36][37][38][39][40]49,[52][53][54][55]. It could be clearly seen that the maximum Langmuir capacity varies very significantly, depending on the type of material, the conditions of the experiment, and the mechanism of adsorption.…”

Section: Adsorption Isothermsmentioning

confidence: 72%

“…It generates the negative charges on the surface of the adsorbents that attract the dye molecules, the electrostatic attraction becoming stronger as the pH of a solution increases. Additionally, the presence of liberated H + ions can be reduced through a neutralization process, which, in turn, enhances the adsorption of MB [49]. The maximum adsorption performance of MB at pH 10 and higher was attained.…”

Section: Effect Of Contact Time and Kinetic Studymentioning

confidence: 99%

Study on the Dye Removal from Aqueous Solutions by Graphene-Based Adsorbents

Vassileva,

Tumbalev,

Kichukova

et al. 2023

Materials

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In the current investigation, the removal efficiency regarding a cationic dye, methylene blue (MB), from three graphene-based materials was investigated. The materials’ characterization process involved instrumental methods such as XRD, XPS, SEM, TEM, FTIR, and nitrogen adsorption at 77 K. The survey examined how various process factors influenced the ability of the studied materials to adsorb cationic dyes. These parameters encompassed contact time, initial dye concentrations, solution pH, and temperature. The adsorption procedure was effectively explained through the application of pseudo-second-order and Langmuir models. The maximum adsorption capacity for the best adsorbent at 293 K was found to be 49.4 mg g−1. In addition, the study also determined the entropy, enthalpy, and Gibbs free energy values associated with the removal of MB and showed that the adsorption of MB is endothermic, feasible, and spontaneous. The results also revealed that the studied materials are suitable adsorbents for the removal of cationic dyes.

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“…The removal of organic dyes can be accomplished by utilizing a variety of treatment methods, including ion exchange, precipitation, coagulation–flocculation, filtration, liquid–liquid extraction, electrochemical methods, and adsorption [ 3 ], especially with carbon-based materials for adsorption and separation [ 4 , 5 ]. Adsorption is considered one of the most efficient removal techniques as it has numerous advantages, including a simple design, reusability of adsorbents/adsorbate, low cost, ease of operation, fewer chemical requirements, high efficiency, and a short time of removal [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetite/MXene (Fe3O4/Ti3C2) Nanocomposite as a Novel Adsorbent for Environmental Remediation of Malachite Green Dye

Alkhudaydi,

Danish,

Abdel Salam

2024

Molecules

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In this work, a novel adsorbent called magnetite/MXene (Fe3O4/Ti3C2) nanocomposite was prepared, characterized, and applied for the removal of organic dye, malachite green dye (MG), from both real water and model solutions. Numerous techniques were used to characterize the prepared Fe3O4/Ti3C2 nanocomposite: XRD, SEM, TEM, FTIR, and surface area analysis. The outcomes showed that the Al layer had been selectively etched, that the MAX phase (Ti3AlC2) had been transformed into layered Ti3C2 MXene, that the cubic Fe3O4 phase had been prepared, and that the prepared Fe3O4 NPs had been evenly distributed on the MXene surface. Also, SEM pictures showed the successful etching of the MAX phase and the formation of the ultrathin multi-layered MXene, which the Fe3O4 NPs covered upon forming the Fe3O4/Ti3C2 nanocomposite at the surface and inside the ultrathin multi-layered MXene. The effect of different operational parameters affecting the removal process was explored and optimized. The MG dye was removed mostly within 60 min, with a 4.68 mg/g removal capacity using 5 mg of the Fe3O4/Ti3C2 nanocomposite. The removal was examined from both kinetic and thermodynamic perspectives, and the findings demonstrated the spontaneity of the removal process as well as the applicability of fractal-like pseudo-first-order and fractal-like pseudo-second-order kinetics when compared to other kinetics models. The Fe3O4/Ti3C2 nanocomposite was used to remove MG dye from real spiked environmental water samples, and the results revealed the successful remediation of the real samples from the organic dye by the Fe3O4/Ti3C2 nanocomposite. Accordingly, Fe3O4/Ti3C2 nanocomposite could be considered a potential adsorbent for the environmental remediation of polluted water.

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Chitosan-Functionalized-Graphene Oxide (GO@CS) Beads as an Effective Adsorbent to Remove Cationic Dye from Wastewater

Cited by 23 publications

References 41 publications

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Study on the Dye Removal from Aqueous Solutions by Graphene-Based Adsorbents

Magnetite/MXene (Fe3O4/Ti3C2) Nanocomposite as a Novel Adsorbent for Environmental Remediation of Malachite Green Dye

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