Crosslinked modified chitosan biopolymer for enhanced removal of toxic Cr(VI) from aqueous solution

Khalil, Tarek E.; Abdel-Salam, Ahmed H.; Mohamed, Laila A.; El-Meligy, Esraa; El-Dissouky, Ali

doi:10.1016/j.ijbiomac.2023.123719

Cited by 17 publications

(8 citation statements)

References 69 publications

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“…However, there was a reduced percentage removal of the ions from 5th cycle to 8th cycle compared to the removal efficiency of the adsorbent for the first 4 cycles. This shows that the capacity of adsorbent gradually decreases with each cycle which is similar to the findings in the literature 8 . Thus, the APS adsorbent showed high stability for the first 4 cycles of the study and achieved high removal percentages for the Pb(II) and Cr(VI) ions with a noticeable decrease in the efficiency from 5th to 8th cycle.…”

Section: Reusability and Regeneration Studiessupporting

confidence: 90%

“…The low values indicate a lower APS-metal ion potential for Pb(II) and Cr(VI) ions, possibly due to their small ionic radii 60 . Also, the R 2 of 0.943 and 0.975 were obtained for Pb(II) and Cr(VI) ions, respectively (Table 4 ), indicating that the Temkin model fits well with the equilibrium data for the adsorption process 8 .…”

Section: Resultsmentioning

confidence: 58%

“…Several technologies exist for the remediation of heavy metals and other impurities from industrial wastewater which include electrochemical methods, coagulation/flocculation, ion flotation, photocatalysis, ion exchange, chemical precipitation, membrane separation and adsorption 8 . However, the adsorption techniques have been considered as the most effective methods for the removal of heavy metals due to their high efficiency, low cost-effectiveness, easy to use and their reusability 5 .…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Ajala,

Aliyu,

Ajala

et al. 2024

Sci Rep

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Waste beneficiation is key to environmental protection and the realisation of a circular economy. Herein, amorphous alumina (a-Al2O3) derived from aluminium waste cans (AWC) was used to modify plantain stalk as an adsorbent for sequestration of lead (II) and chromium (VI) ions from electroplating wastewater. Raw plantain-stalk (RPS) and amorphous-alumina modified plantain stalk (APS) developed as adsorbents were characterised using various equipment such as x-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and Brunauer–Emmett–Teller (BET). The FTIR revealed that the adsorbents are rich in functional groups that could promote the adsorption process which includes carboxyl, hydroxyl, and aliphatic groups. Also, the BET analysis showed a substantial increase in the surface area of APS (174.448 m2/g) compared to that of RPS (40.531 m2/g) which could be due to the effect of modification by the a-Al2O3. The batch adsorption studies revealed that the APS achieved 99.38% and 98.33% removal of Cr(VI) and Pb(II), respectively, which is superior to RPS adsorption efficiency. Also, the estimated and experimental data for the APS compared well under all the kinetic models studied with R2 > 0.88. This suggested that chemisorption is the most plausible adsorption mechanism of Cr(VI) and Pb(II) onto the APS. Further analysis showed that the Cr(VI) and Pb(II) adsorption followed the Langmuir model with the RL value of 0.038 and 0.999, respectively, which indicated that the two metal ions were effectively adsorbed onto the APS. Therefore, this work demonstrated that the modification of plantain-stalk with amorphous-alumina derived from AWC enhanced the characteristics of the APS and favoured its adsorption of the selected heavy metals.

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Section: Reusability and Regeneration Studiessupporting

confidence: 90%

Section: Resultsmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Ajala,

Aliyu,

Ajala

et al. 2024

Sci Rep

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show abstract

“…Crosslinked chitosan derivatives are created by crosslinking the primary amine groups of chitosan with crosslinking agents, such as glutaraldehyde or genipin. The crosslinking reaction forms bridges between the primary amine groups of adjacent chitosan molecules, resulting in a three-dimensional network structure with improved mechanical properties and controlled release behaviours [27]. Graft copolymers of chitosan involve attaching other polymer chains onto the primary amine groups of chitosan through grafting reactions, such as free radical polymerisation or enzymatic grafting.…”

Section: Chitosan Derivativesmentioning

confidence: 99%

Recent Applications of Chitosan and Its Derivatives in Antibacterial, Anticancer, Wound Healing, and Tissue Engineering Fields

Mawazi,

Kumar,

Ahmad

et al. 2024

Polymers

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Chitosan, a versatile biopolymer derived from chitin, has garnered significant attention in various biomedical applications due to its unique properties, such as biocompatibility, biodegradability, and mucoadhesiveness. This review provides an overview of the diverse applications of chitosan and its derivatives in the antibacterial, anticancer, wound healing, and tissue engineering fields. In antibacterial applications, chitosan exhibits potent antimicrobial properties by disrupting microbial membranes and DNA, making it a promising natural preservative and agent against bacterial infections. Its role in cancer therapy involves the development of chitosan-based nanocarriers for targeted drug delivery, enhancing therapeutic efficacy while minimising side effects. Chitosan also plays a crucial role in wound healing by promoting cell proliferation, angiogenesis, and regulating inflammatory responses. Additionally, chitosan serves as a multifunctional scaffold in tissue engineering, facilitating the regeneration of diverse tissues such as cartilage, bone, and neural tissue by promoting cell adhesion and proliferation. The extensive range of applications for chitosan in pharmaceutical and biomedical sciences is not only highlighted by the comprehensive scope of this review, but it also establishes it as a fundamental component for forthcoming research in biomedicine.

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“…15 Among these, modification through graft polymerization stands out due to its user-friendly nature and the ability to introduce graft chains to the surface while maintaining unchanged bulk properties. 16,17 Grafting of side chains can occur through two methods: "grafting-from" and "graftingto." In the former, the membrane surface features reactive radicals, while in the latter, grafting chains carry the reactive radicals for initiation.…”

mentioning

confidence: 99%

Improving water desalination: Sustainable grafted cellulose acetate reverse osmosis membrane from Egyptian cotton

Zhang,

Morsy,

Kandil

et al. 2024

Polymer Engineering & Sci

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Cellulose diacetate (CDA) and triacetate (CTA) were derived from Egyptian cotton to fabricate reverse osmosis (RO) membranes. The Pphase inversion method was utilized for the production of CDA‐based membranes. Comprehensive characterization of these membranes involved structural, morphologial, and hydrophilic property analyses through techniques such as nuclear magnetic resonance (NMR), infrared spectroscopy, thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle measurements. NMR spectra indicated a degree of substitution of 2.9 for CTA and 2 for CDA. The resulting RO membrane demonstrated a water flux of 6.1 L/m2·h and a salt rejection of 90.3%. Annealing led to an enhanced top layer with reduced defects and macrovoids in the support layer. Moreover, grafting the RO membranes with 15 wt% of 2‐acrylamidopropane‐2‐methyl sulphonic acid improved salt rejection to 96.2% and water flux to 8.7 L/m2.h. These findings underscore the significant performance enhancements achieved through both annealing and grafting processes in RO membranes.

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Crosslinked modified chitosan biopolymer for enhanced removal of toxic Cr(VI) from aqueous solution

Cited by 17 publications

References 69 publications

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Adsorption of lead and chromium ions from electroplating wastewater using plantain stalk modified by amorphous alumina developed from waste cans

Recent Applications of Chitosan and Its Derivatives in Antibacterial, Anticancer, Wound Healing, and Tissue Engineering Fields

Improving water desalination: Sustainable grafted cellulose acetate reverse osmosis membrane from Egyptian cotton

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