Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)Pyridine
The accumulation of plastic waste products in the environment has adversely affected wildlife and human beings. Common plastics that accumulate in the environment are plastics that are made of polyethylene terephthalate (PET) polymer. PET plastic waste products can be recycled for beneficial use, wh...
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MDPI AG
2021-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/24/11912 |
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| author | Thandiwe Crystal Totito Katri Laatikainen Omoniyi Pereao Chris Bode-Aluko Leslie Petrik |
| author_facet | Thandiwe Crystal Totito Katri Laatikainen Omoniyi Pereao Chris Bode-Aluko Leslie Petrik |
| author_sort | Thandiwe Crystal Totito |
| collection | DOAJ |
| description | The accumulation of plastic waste products in the environment has adversely affected wildlife and human beings. Common plastics that accumulate in the environment are plastics that are made of polyethylene terephthalate (PET) polymer. PET plastic waste products can be recycled for beneficial use, which would reduce their negative impacts. In this study, modified PET or waste PET (WPET) from plastic bottles was blended with powder commercial 2-(aminomethyl)pyridine (SiAMPy) resin and electrospun into composite nanofibres and applied for Cu<sup>2+</sup> adsorption. PET-SiAMPy or WPET-SiAMPy composite nanofibres fibre diameters from the HRSEM images were 90–140 nm and 110–155 nm, respectively. In batch adsorption experiments, PET-SiAMPy or WPET-SiAMPy composite nanofibres achieved Cu<sup>2+</sup> adsorption equilibrium within 60 secs of contact time with 0.98 mmol/g (89.87%) or 1.24 mmol/g (96.04%) Cu<sup>2+</sup> adsorption capacity. The Cu<sup>2+</sup> complex formation rate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>k</mi></semantics></math></inline-formula>) with WPET-SiAMPy was 0.0888 with the mole ratio of Cu<sup>2+</sup> and WPET-SiAMPy nanofibres 1:2. The complex molecular formula formed was Cu(WPET-SiAMPy)<sub>2</sub> with a square planar geometry structure. The WPET-SiAMPy nanofibres’ adsorption was best fitted to the Freundlich isotherm. WPET-SiAMPy composite nanofibres were considered highly efficient for Cu<sup>2+</sup> adsorption from aqueous solution and could be regenerated at least five times using 5 M H<sub>2</sub>SO<sub>4</sub>. |
| first_indexed | 2024-03-10T04:36:49Z |
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| language | English |
| last_indexed | 2024-03-10T04:36:49Z |
| publishDate | 2021-12-01 |
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| spelling | doaj.art-96a2a24852ce4beda9319bd3a1e2cec72023-11-23T03:40:18ZengMDPI AGApplied Sciences2076-34172021-12-0111241191210.3390/app112411912Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)PyridineThandiwe Crystal Totito0Katri Laatikainen1Omoniyi Pereao2Chris Bode-Aluko3Leslie Petrik4Environmental and Nanoscience Research Group, Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville 7535, South AfricaDepartment of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology LUT, Yliopistonkatu 34, FI-53850 Lappeenranta, FinlandEnvironmental and Nanoscience Research Group, Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville 7535, South AfricaEnvironmental and Nanoscience Research Group, Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville 7535, South AfricaEnvironmental and Nanoscience Research Group, Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville 7535, South AfricaThe accumulation of plastic waste products in the environment has adversely affected wildlife and human beings. Common plastics that accumulate in the environment are plastics that are made of polyethylene terephthalate (PET) polymer. PET plastic waste products can be recycled for beneficial use, which would reduce their negative impacts. In this study, modified PET or waste PET (WPET) from plastic bottles was blended with powder commercial 2-(aminomethyl)pyridine (SiAMPy) resin and electrospun into composite nanofibres and applied for Cu<sup>2+</sup> adsorption. PET-SiAMPy or WPET-SiAMPy composite nanofibres fibre diameters from the HRSEM images were 90–140 nm and 110–155 nm, respectively. In batch adsorption experiments, PET-SiAMPy or WPET-SiAMPy composite nanofibres achieved Cu<sup>2+</sup> adsorption equilibrium within 60 secs of contact time with 0.98 mmol/g (89.87%) or 1.24 mmol/g (96.04%) Cu<sup>2+</sup> adsorption capacity. The Cu<sup>2+</sup> complex formation rate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>k</mi></semantics></math></inline-formula>) with WPET-SiAMPy was 0.0888 with the mole ratio of Cu<sup>2+</sup> and WPET-SiAMPy nanofibres 1:2. The complex molecular formula formed was Cu(WPET-SiAMPy)<sub>2</sub> with a square planar geometry structure. The WPET-SiAMPy nanofibres’ adsorption was best fitted to the Freundlich isotherm. WPET-SiAMPy composite nanofibres were considered highly efficient for Cu<sup>2+</sup> adsorption from aqueous solution and could be regenerated at least five times using 5 M H<sub>2</sub>SO<sub>4</sub>.https://www.mdpi.com/2076-3417/11/24/11912waste plasticpolyethylene terephthalateelectrospinning2-(aminomethyl)pyridineadsorptioncopper ion |
| spellingShingle | Thandiwe Crystal Totito Katri Laatikainen Omoniyi Pereao Chris Bode-Aluko Leslie Petrik Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)Pyridine Applied Sciences waste plastic polyethylene terephthalate electrospinning 2-(aminomethyl)pyridine adsorption copper ion |
| title | Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)Pyridine |
| title_full | Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)Pyridine |
| title_fullStr | Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)Pyridine |
| title_full_unstemmed | Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)Pyridine |
| title_short | Adsorptive Recovery of Cu<sup>2+</sup> from Aqueous Solution by Polyethylene Terephthalate Nanofibres Modified with 2-(Aminomethyl)Pyridine |
| title_sort | adsorptive recovery of cu sup 2 sup from aqueous solution by polyethylene terephthalate nanofibres modified with 2 aminomethyl pyridine |
| topic | waste plastic polyethylene terephthalate electrospinning 2-(aminomethyl)pyridine adsorption copper ion |
| url | https://www.mdpi.com/2076-3417/11/24/11912 |
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