Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous Solutions
Pollution by heavy metals such as lead is a major concern, since exposure to these metals can lead to various adverse health effects. In this work, nanofibers composed of CuO (CuONFs) were developed as a novel and promising material for Pb(II) adsorption. There have been no previous reports concerni...
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2025-01-01
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| author | Amábile Giotto dos Santos Thiago Rodrigues Martins Satheesh Krishnamurthy Daniel Assumpção Bertuol Eduardo Hiromitsu Tanabe |
| author_facet | Amábile Giotto dos Santos Thiago Rodrigues Martins Satheesh Krishnamurthy Daniel Assumpção Bertuol Eduardo Hiromitsu Tanabe |
| author_sort | Amábile Giotto dos Santos |
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| description | Pollution by heavy metals such as lead is a major concern, since exposure to these metals can lead to various adverse health effects. In this work, nanofibers composed of CuO (CuONFs) were developed as a novel and promising material for Pb(II) adsorption. There have been no previous reports concerning the production of polyacrylonitrile nanofibers modified with copper sulfate pentahydrate, followed by calcination, to be utilized as a Pb(II) adsorbent. The nanofibers were obtained using the centrifugal spinning method and then were characterized before and after a calcination step using analytical techniques. Adsorption parameters were investigated, including pH, contact time, adsorbate concentration, and temperature. Satisfactory Pb (II) adsorption was reached at 298 K, pH 5.8, and a maximum adsorption of 151.34 mg g<sup>−1</sup> was achieved, predicted by the Hill model. The kinetic data proved that Pb (II) adsorption better fitted the pseudo-second-order model, while the Hill model was confirmed to best fit the equilibrium data. Thermodynamic parameters demonstrated that the lead adsorption was favorable, spontaneous, and exothermic. The CuONFs maintained 97.51% of their initial adsorption capacity after two adsorption/desorption cycles. The results showed that CuONFs have excellent potential as an adsorbent for Pb(II), while also showing high stability during reuse. |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-530ea06bc8b147858cf9dfc1240adc082025-01-24T13:41:32ZengMDPI AGMetals2075-47012025-01-011515610.3390/met15010056Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous SolutionsAmábile Giotto dos Santos0Thiago Rodrigues Martins1Satheesh Krishnamurthy2Daniel Assumpção Bertuol3Eduardo Hiromitsu Tanabe4Environmental Processes Laboratory (LAPAM), Chemical Engineering Department, Federal University of Santa Maria—UFSM, Santa Maria 97105-900, RS, BrazilEnvironmental Processes Laboratory (LAPAM), Chemical Engineering Department, Federal University of Santa Maria—UFSM, Santa Maria 97105-900, RS, BrazilSurrey Ion Beam Centre, Advanced Technology Institute, University of Surrey, Guildford GU2 7XH, Surrey, UKEnvironmental Processes Laboratory (LAPAM), Chemical Engineering Department, Federal University of Santa Maria—UFSM, Santa Maria 97105-900, RS, BrazilEnvironmental Processes Laboratory (LAPAM), Chemical Engineering Department, Federal University of Santa Maria—UFSM, Santa Maria 97105-900, RS, BrazilPollution by heavy metals such as lead is a major concern, since exposure to these metals can lead to various adverse health effects. In this work, nanofibers composed of CuO (CuONFs) were developed as a novel and promising material for Pb(II) adsorption. There have been no previous reports concerning the production of polyacrylonitrile nanofibers modified with copper sulfate pentahydrate, followed by calcination, to be utilized as a Pb(II) adsorbent. The nanofibers were obtained using the centrifugal spinning method and then were characterized before and after a calcination step using analytical techniques. Adsorption parameters were investigated, including pH, contact time, adsorbate concentration, and temperature. Satisfactory Pb (II) adsorption was reached at 298 K, pH 5.8, and a maximum adsorption of 151.34 mg g<sup>−1</sup> was achieved, predicted by the Hill model. The kinetic data proved that Pb (II) adsorption better fitted the pseudo-second-order model, while the Hill model was confirmed to best fit the equilibrium data. Thermodynamic parameters demonstrated that the lead adsorption was favorable, spontaneous, and exothermic. The CuONFs maintained 97.51% of their initial adsorption capacity after two adsorption/desorption cycles. The results showed that CuONFs have excellent potential as an adsorbent for Pb(II), while also showing high stability during reuse.https://www.mdpi.com/2075-4701/15/1/56polyacrylonitrilecopper sulfatenanofibersadsorptionleadmetal removal |
| spellingShingle | Amábile Giotto dos Santos Thiago Rodrigues Martins Satheesh Krishnamurthy Daniel Assumpção Bertuol Eduardo Hiromitsu Tanabe Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous Solutions Metals polyacrylonitrile copper sulfate nanofibers adsorption lead metal removal |
| title | Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous Solutions |
| title_full | Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous Solutions |
| title_fullStr | Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous Solutions |
| title_full_unstemmed | Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous Solutions |
| title_short | Production of Nanofibers Composed of CuO for the Removal of Pb(II) from Aqueous Solutions |
| title_sort | production of nanofibers composed of cuo for the removal of pb ii from aqueous solutions |
| topic | polyacrylonitrile copper sulfate nanofibers adsorption lead metal removal |
| url | https://www.mdpi.com/2075-4701/15/1/56 |
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