Chitosan Functionalized with Carboxyl Groups as a Recyclable Biomaterial for the Adsorption of Cu (II) and Zn (II) Ions in Aqueous Media

El-Soad, Asmaa Abu; Lazzara, Giuseppe; El‐Magied, Mahmoud O. Abd; Cavallaro, Giuseppe; Al‐Otaibi, Jamelah S.; Sayyed, M.I.; Kovaleva, Elena G.

doi:10.3390/ijms23042396

Cited by 16 publications

(7 citation statements)

References 56 publications

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“…Wastewater from chemical processes containing high concentrations of toxic metals should not be discharged into the aquatic environment without proper treatment. To solve this issue, the development of new eco-friendly materials for metal ion removal is an intensely debated issue by worldwide scientific researchers [ 1 , 2 , 3 , 4 , 5 , 6 ]. The efficient removal of metal ions from polluted wastewater is one of the most important steps in the de-pollution process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Eco-Friendly Chelating Resins and Their Applications for Water Treatment

et al. 2023

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In the present study, two chelating resins were prepared and used for simultaneous adsorption of toxic metal ions, i.e., Cr3+, Mn2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, and Pb2+ (MX+). In the first step, chelating resins were prepared starting with styrene-divinylbenzene resin, a strong basic anion exchanger Amberlite IRA 402(Cl−) with two chelating agents, i.e., tartrazine (TAR) and amido black 10B (AB 10B). Key parameters such as contact time, pH, initial concentration, and stability were evaluated for the obtained chelating resins (IRA 402/TAR and IRA 402/AB 10B). The obtained chelating resins show excellent stability in 2M HCl, 2M NaOH, and also in ethanol (EtOH) medium. The stability of the chelating resins decreased when the combined mixture (2M HCl:EtOH = 2:1) was added. The above-mentioned aspect was more evident for IRA 402/TAR compared to IRA 402/AB 10B. Taking into account the higher stability of the IRA 402/TAR and IRA 402/AB 10B resins, in a second step, adsorption studies were carried out on complex acid effluents polluted with MX+. The adsorption of MX+ from an acidic aqueous medium on the chelating resins was evaluated using the ICP-MS method. The following affinity series under competitive analysis for IRA 402/TAR was obtained: Fe3+(44 µg/g) > Ni2+(39.8 µg/g) > Cd2+(34 µg/g) > Cr3+(33.2 µg/g) > Pb2+(32.7 µg/g) > Cu2+ (32.5 µg/g) > Mn2+(31 µg/g) > Co2+(29 µg/g) > Zn2+ (27.5 µg/g). While for IRA 402/AB 10B, the following behavior was observed: Fe3+(58 µg/g) > Ni2+(43.5 µg/g) > Cd2+(43 µg/g) > Cu2+(38 µg/g) > Cr3+(35 µg/g) > Pb2+(34.5 µg/g) > Co2+(32.8 µg/g) > Mn2+(33 µg/g) > Zn2+(32 µg/g), consistent with the decreasing affinity of MX+ for chelate resin. The chelating resins were characterized using TG, FTIR, and SEM analysis. The obtained results showed that the chelating resins prepared have promising potential for wastewater treatment in the context of the circular economy approach.

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Section: Introductionmentioning

confidence: 99%

Preparation of Eco-Friendly Chelating Resins and Their Applications for Water Treatment

et al. 2023

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“…The presence of amine and amide bonds in this peptide was confirmed through Fourier transform infrared (FTIR) spectroscopy, with a broad band assigned to CO out-of-plane bending (amide VI, 598.2 cm –1 ) and characteristic peaks of N–H out-of-plane bending (721.8 cm –1 ), amide II and elongation of the C–N bending (1531.8 cm –1 ), and CO (amide I, 1651.9 cm –1 ) and N–H stretching (primary amine, 3287.3 cm –1 ; Figure S2). − …”

Section: Resultsmentioning

confidence: 99%

Modular Label-Free Electrochemical Biosensor Loading Nature-Inspired Peptide toward the Widespread Use of COVID-19 Antibody Tests

et al. 2022

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Limitations of the recognition elements in terms of synthesis, cost, availability, and stability have impaired the translation of biosensors into practical use. Inspired by nature to mimic the molecular recognition of the anti-SARS-CoV-2 S protein antibody (Ab S ) by the S protein binding site, we synthesized the peptide sequence of Asn-Asn-Ala-Thr-Asn-COOH (abbreviated as PEP2003) to create COVID-19 screening label-free (LF) biosensors based on a carbon electrode, gold nanoparticles (AuNPs), and electrochemical impedance spectroscopy. The PEP2003 is easily obtained by chemical synthesis, and it can be adsorbed on electrodes while maintaining its ability for Ab S recognition, further leading to a sensitivity 3.4-fold higher than the full-length S protein, which is in agreement with the increase in the target-to-receptor size ratio. Peptide-loaded LF devices based on noncovalent immobilization were developed by affording fast and simple analyses, along with a modular functionalization. From studies by molecular docking, the peptide–Ab S binding was found to be driven by hydrogen bonds and hydrophobic interactions. Moreover, the peptide is not amenable to denaturation, thus addressing the trade-off between scalability, cost, and robustness. The biosensor preserves 95.1% of the initial signal for 20 days when stored dry at 4 °C. With the aid of two simple equations fitted by machine learning (ML), the method was able to make the COVID-19 screening of 39 biological samples into healthy and infected groups with 100.0% accuracy. By taking advantage of peptide-related merits combined with advances in surface chemistry and ML-aided accuracy, this platform is promising to bring COVID-19 biosensors into mainstream use toward straightforward, fast, and accurate analyses at the point of care, with social and economic impacts being achieved.

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“…CTS is a natural linear polysaccharide comprised N-acetyl-D-glucosamine and β-(1–4)-linked D-glucosamine, which can be extracted by the alkaline deacetylation of chitin. 43 , 44 CTS has numerous features such as antibacterial, biodegradability, cationic nature, non-allergic, and non-toxicity. 45 MXenes are a new type of two-dimensional (2D) transition metal carbides formulated as M n+1 X n T x , where M is an early transition metal, X is C and/or N, T is a surface termination O, OH, F, and/or Cl, n is 1–3.…”

Section: Introductionmentioning

confidence: 99%

High-sensitivity, ultrawide linear range, antibacterial textile pressure sensor based on chitosan/MXene hierarchical architecture

Gu,

Zhou,

Shen

et al. 2024

iScience

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Chitosan Functionalized with Carboxyl Groups as a Recyclable Biomaterial for the Adsorption of Cu (II) and Zn (II) Ions in Aqueous Media

Cited by 16 publications

References 56 publications

Preparation of Eco-Friendly Chelating Resins and Their Applications for Water Treatment

Preparation of Eco-Friendly Chelating Resins and Their Applications for Water Treatment

Modular Label-Free Electrochemical Biosensor Loading Nature-Inspired Peptide toward the Widespread Use of COVID-19 Antibody Tests

High-sensitivity, ultrawide linear range, antibacterial textile pressure sensor based on chitosan/MXene hierarchical architecture

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