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A comparative study of magnetic chitosan (Chi@Fe3O4) and graphene oxide modified magnetic chitosan (Chi@Fe3O4GO) nanocomposites for efficient removal of Cr(VI) from water.
Int J Biol Macromol. 2019 Sep 15; 137:948-959.IJ

Abstract

Magnetic chitosan (Chi@Fe3O4) nanocomposite was synthesized and modified with graphene oxide (Chi@Fe3O4GO) and the potential of both materials as adsorbents was assessed for the removal of chromium (Cr(VI)) from water. The physico-chemical characteristics of magnetic nanocomposites were studied by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), x-ray diffraction (XRD), Raman spectroscopy and Brunauer-Emmett-Teller (BET). The synthesized adsorbents exhibited varied Cr(VI) removal efficiency at solution pH 2. The reaction kinetics correlated well with the pseudo-second-order model. The maximum adsorption capacity was found to be 142.32 and 100.51 mg g-1 for Chi@Fe3O4 and Chi@Fe3O4GO, respectively. Analysis of thermodynamic parameters suggested that the reaction occurred spontaneously and was endothermic in nature. Reusability studies showed that the adsorbents can be reused for up to four cycles of regeneration. Fixed bed column experiments revealed that the adsorption performance of Chi@Fe3O4 was affected by the flow rate, adsorbent loading and influent metal ion concentration. The results suggest that the prepared adsorbents have the potential to be used in removing Cr(VI) ions from contaminated water.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Subedi N
Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland.
Lähde A
Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland.
Abu-Danso E
Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland.
Iqbal J
College of Natural and Health Sciences, Zayed University, P.O. Box 144534, Abu Dhabi, United Arab Emirates.
Bhatnagar A
Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland. Electronic address: amit.bhatnagar@uef.fi.

MeSH

AdsorptionChitosanChromiumGraphiteHydrogen-Ion ConcentrationKineticsMagnetite NanoparticlesNanocompositesOsmolar ConcentrationSolutionsThermodynamicsWaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

31238072

Citation

Subedi, Nabin, et al. "A Comparative Study of Magnetic Chitosan (Chi@Fe3O4) and Graphene Oxide Modified Magnetic Chitosan (Chi@Fe3O4GO) Nanocomposites for Efficient Removal of Cr(VI) From Water." International Journal of Biological Macromolecules, vol. 137, 2019, pp. 948-959.
Subedi N, Lähde A, Abu-Danso E, et al. A comparative study of magnetic chitosan (Chi@Fe3O4) and graphene oxide modified magnetic chitosan (Chi@Fe3O4GO) nanocomposites for efficient removal of Cr(VI) from water. Int J Biol Macromol. 2019;137:948-959.
Subedi, N., Lähde, A., Abu-Danso, E., Iqbal, J., & Bhatnagar, A. (2019). A comparative study of magnetic chitosan (Chi@Fe3O4) and graphene oxide modified magnetic chitosan (Chi@Fe3O4GO) nanocomposites for efficient removal of Cr(VI) from water. International Journal of Biological Macromolecules, 137, 948-959. https://doi.org/10.1016/j.ijbiomac.2019.06.151
Subedi N, et al. A Comparative Study of Magnetic Chitosan (Chi@Fe3O4) and Graphene Oxide Modified Magnetic Chitosan (Chi@Fe3O4GO) Nanocomposites for Efficient Removal of Cr(VI) From Water. Int J Biol Macromol. 2019 Sep 15;137:948-959. PubMed PMID: 31238072.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A comparative study of magnetic chitosan (Chi@Fe3O4) and graphene oxide modified magnetic chitosan (Chi@Fe3O4GO) nanocomposites for efficient removal of Cr(VI) from water. AU - Subedi,Nabin, AU - Lähde,Anna, AU - Abu-Danso,Emmanuel, AU - Iqbal,Jibran, AU - Bhatnagar,Amit, Y1 - 2019/06/22/ PY - 2019/02/22/received PY - 2019/05/29/revised PY - 2019/06/20/accepted PY - 2019/6/27/pubmed PY - 2020/2/6/medline PY - 2019/6/26/entrez KW - Chitosan KW - Cr(VI) KW - Graphene oxide KW - Magnetic nanocomposite KW - Water treatment SP - 948 EP - 959 JF - International journal of biological macromolecules JO - Int J Biol Macromol VL - 137 N2 - Magnetic chitosan (Chi@Fe3O4) nanocomposite was synthesized and modified with graphene oxide (Chi@Fe3O4GO) and the potential of both materials as adsorbents was assessed for the removal of chromium (Cr(VI)) from water. The physico-chemical characteristics of magnetic nanocomposites were studied by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), x-ray diffraction (XRD), Raman spectroscopy and Brunauer-Emmett-Teller (BET). The synthesized adsorbents exhibited varied Cr(VI) removal efficiency at solution pH 2. The reaction kinetics correlated well with the pseudo-second-order model. The maximum adsorption capacity was found to be 142.32 and 100.51 mg g-1 for Chi@Fe3O4 and Chi@Fe3O4GO, respectively. Analysis of thermodynamic parameters suggested that the reaction occurred spontaneously and was endothermic in nature. Reusability studies showed that the adsorbents can be reused for up to four cycles of regeneration. Fixed bed column experiments revealed that the adsorption performance of Chi@Fe3O4 was affected by the flow rate, adsorbent loading and influent metal ion concentration. The results suggest that the prepared adsorbents have the potential to be used in removing Cr(VI) ions from contaminated water. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/31238072/A_comparative_study_of_magnetic_chitosan__Chi@Fe3O4__and_graphene_oxide_modified_magnetic_chitosan__Chi@Fe3O4GO__nanocomposites_for_efficient_removal_of_Cr_VI__from_water_ DB - PRIME DP - Unbound Medicine ER -