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Unexpected effect of magnetic nanoparticles on the performance of aqueous removal of toxic Cr(VI) using modified biopolymer chitosan.
Int J Biol Macromol. 2021 Feb 15; 170:768-779.IJ

Abstract

Modified biopolymer chitosan namely 2-hydroxy-1-naphthaldehyde chitosan (CTS-Nap) has been synthesized for the removal of toxic chromium from aqueous solutions. In an attempt to enhance the adsorption capacity of toxic chromium on the prepared modified biopolymer, magnetic Fe3O4 nanoparticles have been loaded on the modified adsorbent to form the magnetite adsorbent (Fe3O4@CTS-Nap). The adsorption mechanism of both adsorbents is explored by batch experiments, FT-IR, SEM, TEM, XRD, VSM, and EDS. The optimum adsorption is achieved at pH 1.5 for CTS-Nap and 1.0 for Fe3O4@CTS-Nap. Pseudo second order illustrated the best description for the adsorption process with correlation coefficient R2 = 0.999 and the film diffusion or chemisorption is the rate-limiting step. The equilibrium data is analyzed using five isotherm models, the experimental data agreed well with the Freundlich model with a maximum adsorption capacity of 78.12 mg g-1 and 57.14 mg g-1 for CTS-Nap and Fe3O4@CTS-Nap, respectively. However, this unexpected result revealed that the presence of magnetic nanoparticles does not always enhance the adsorption process and many other factors could control the adsorption process. Generally, these outcomes revealed that the unmagnetite modified adsorbent CTS-Nap have practical greater influence on wastewater treatment management rather than the magnetic modified chitosan Fe3O4@CTS-Nap.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Khalil TE
Chemistry Department, Faculty of Science, Alexandria University, 2 Bagdad Street, P.O. Box 2, Moharrem Beck, 21321, Alexandria, Egypt. Electronic address: tarekakel@alexu.edu.eg.
Elhusseiny AF
Chemistry Department, Faculty of Science, Alexandria University, 2 Bagdad Street, P.O. Box 2, Moharrem Beck, 21321, Alexandria, Egypt.
Ibrahim NM
Chemistry Department, Faculty of Science, Alexandria University, 2 Bagdad Street, P.O. Box 2, Moharrem Beck, 21321, Alexandria, Egypt.
El-Dissouky A
Chemistry Department, Faculty of Science, Alexandria University, 2 Bagdad Street, P.O. Box 2, Moharrem Beck, 21321, Alexandria, Egypt.

MeSH

AdsorptionBiopolymersChitosanChromiumKineticsMagneticsMagnetite NanoparticlesWaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33385450

Citation

Khalil, Tarek E., et al. "Unexpected Effect of Magnetic Nanoparticles On the Performance of Aqueous Removal of Toxic Cr(VI) Using Modified Biopolymer Chitosan." International Journal of Biological Macromolecules, vol. 170, 2021, pp. 768-779.
Khalil TE, Elhusseiny AF, Ibrahim NM, et al. Unexpected effect of magnetic nanoparticles on the performance of aqueous removal of toxic Cr(VI) using modified biopolymer chitosan. Int J Biol Macromol. 2021;170:768-779.
Khalil, T. E., Elhusseiny, A. F., Ibrahim, N. M., & El-Dissouky, A. (2021). Unexpected effect of magnetic nanoparticles on the performance of aqueous removal of toxic Cr(VI) using modified biopolymer chitosan. International Journal of Biological Macromolecules, 170, 768-779. https://doi.org/10.1016/j.ijbiomac.2020.12.188
Khalil TE, et al. Unexpected Effect of Magnetic Nanoparticles On the Performance of Aqueous Removal of Toxic Cr(VI) Using Modified Biopolymer Chitosan. Int J Biol Macromol. 2021 Feb 15;170:768-779. PubMed PMID: 33385450.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Unexpected effect of magnetic nanoparticles on the performance of aqueous removal of toxic Cr(VI) using modified biopolymer chitosan. AU - Khalil,Tarek E, AU - Elhusseiny,Amel F, AU - Ibrahim,Nagwa M, AU - El-Dissouky,Ali, Y1 - 2020/12/29/ PY - 2020/10/30/received PY - 2020/12/15/revised PY - 2020/12/23/accepted PY - 2021/1/2/pubmed PY - 2021/4/15/medline PY - 2021/1/1/entrez KW - Bio-nanocomposites KW - Cr(VI) KW - Magnetic modified chitosan SP - 768 EP - 779 JF - International journal of biological macromolecules JO - Int J Biol Macromol VL - 170 N2 - Modified biopolymer chitosan namely 2-hydroxy-1-naphthaldehyde chitosan (CTS-Nap) has been synthesized for the removal of toxic chromium from aqueous solutions. In an attempt to enhance the adsorption capacity of toxic chromium on the prepared modified biopolymer, magnetic Fe3O4 nanoparticles have been loaded on the modified adsorbent to form the magnetite adsorbent (Fe3O4@CTS-Nap). The adsorption mechanism of both adsorbents is explored by batch experiments, FT-IR, SEM, TEM, XRD, VSM, and EDS. The optimum adsorption is achieved at pH 1.5 for CTS-Nap and 1.0 for Fe3O4@CTS-Nap. Pseudo second order illustrated the best description for the adsorption process with correlation coefficient R2 = 0.999 and the film diffusion or chemisorption is the rate-limiting step. The equilibrium data is analyzed using five isotherm models, the experimental data agreed well with the Freundlich model with a maximum adsorption capacity of 78.12 mg g-1 and 57.14 mg g-1 for CTS-Nap and Fe3O4@CTS-Nap, respectively. However, this unexpected result revealed that the presence of magnetic nanoparticles does not always enhance the adsorption process and many other factors could control the adsorption process. Generally, these outcomes revealed that the unmagnetite modified adsorbent CTS-Nap have practical greater influence on wastewater treatment management rather than the magnetic modified chitosan Fe3O4@CTS-Nap. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/33385450/Unexpected_effect_of_magnetic_nanoparticles_on_the_performance_of_aqueous_removal_of_toxic_Cr_VI__using_modified_biopolymer_chitosan_ DB - PRIME DP - Unbound Medicine ER -