Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite
A novel porous gold polymer composite was prepared by the functionalization of a glycidyl methacrylate-based copolymer (pGME) with ethylene diamine (pGME-en), and activation by gold (pGME-en/Au), in a simple batch adsorption procedure in an acid solution, at room temperature. Detailed characterizati...
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/11/1864 |
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| author | Tamara Tadić Bojana Marković Zorica Vuković Plamen Stefanov Danijela Maksin Aleksandra Nastasović Antonije Onjia |
| author_facet | Tamara Tadić Bojana Marković Zorica Vuković Plamen Stefanov Danijela Maksin Aleksandra Nastasović Antonije Onjia |
| author_sort | Tamara Tadić |
| collection | DOAJ |
| description | A novel porous gold polymer composite was prepared by the functionalization of a glycidyl methacrylate-based copolymer (pGME) with ethylene diamine (pGME-en), and activation by gold (pGME-en/Au), in a simple batch adsorption procedure in an acid solution, at room temperature. Detailed characterization of the pGME-en before and after activation was performed. The main focuses of this research were the design of a method that can enable the recovery of gold and the reuse of this multipurpose sorbent as an antimicrobial agent. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis pointed out amine groups as the primary binding sites for Au activation, while hydroxyl groups also contributed to the chelation reaction. pGME-en exhibited fast gold adsorption with an adsorption half-time of 5 min and an equilibrium time of 30 min. The maximal adsorption capacity was about 187 mg/g. The analysis of sorption experimental data with a non-linear surface reaction and diffusion-based kinetic models revealed the pseudo-second-order and Avrami model as the best fit, with unambiguous control by liquid film and intra-particle diffusion. The biological activity studies against <i>Staphylococcus aureus</i>, <i>Listeria monocytogenes</i>, <i>Escherichia coli</i>, and <i>Candida albicans</i> revealed moderate activity of pGME-en/Au against different bacterial and fungal species. pGME-en/Au was stable in a saline solution, with a release of approximately 2.3 mg/g after 24 h. |
| first_indexed | 2024-03-09T16:37:30Z |
| format | Article |
| id | doaj.art-bd919b9b2fe846e1a3f7426a5149b43a |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T16:37:30Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-bd919b9b2fe846e1a3f7426a5149b43a2023-11-24T14:55:54ZengMDPI AGMetals2075-47012023-11-011311186410.3390/met13111864Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold CompositeTamara Tadić0Bojana Marković1Zorica Vuković2Plamen Stefanov3Danijela Maksin4Aleksandra Nastasović5Antonije Onjia6Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, SerbiaInstitute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, SerbiaInstitute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, SerbiaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., bld. 11, 1113 Sofia, BulgariaVinča Institute of Nuclear Sciences, University of Belgrade, 11000 Belgrade, SerbiaInstitute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, SerbiaA novel porous gold polymer composite was prepared by the functionalization of a glycidyl methacrylate-based copolymer (pGME) with ethylene diamine (pGME-en), and activation by gold (pGME-en/Au), in a simple batch adsorption procedure in an acid solution, at room temperature. Detailed characterization of the pGME-en before and after activation was performed. The main focuses of this research were the design of a method that can enable the recovery of gold and the reuse of this multipurpose sorbent as an antimicrobial agent. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis pointed out amine groups as the primary binding sites for Au activation, while hydroxyl groups also contributed to the chelation reaction. pGME-en exhibited fast gold adsorption with an adsorption half-time of 5 min and an equilibrium time of 30 min. The maximal adsorption capacity was about 187 mg/g. The analysis of sorption experimental data with a non-linear surface reaction and diffusion-based kinetic models revealed the pseudo-second-order and Avrami model as the best fit, with unambiguous control by liquid film and intra-particle diffusion. The biological activity studies against <i>Staphylococcus aureus</i>, <i>Listeria monocytogenes</i>, <i>Escherichia coli</i>, and <i>Candida albicans</i> revealed moderate activity of pGME-en/Au against different bacterial and fungal species. pGME-en/Au was stable in a saline solution, with a release of approximately 2.3 mg/g after 24 h.https://www.mdpi.com/2075-4701/13/11/1864glycidyl methacrylateadsorptionAuantimicrobial activityXPS |
| spellingShingle | Tamara Tadić Bojana Marković Zorica Vuković Plamen Stefanov Danijela Maksin Aleksandra Nastasović Antonije Onjia Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite Metals glycidyl methacrylate adsorption Au antimicrobial activity XPS |
| title | Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite |
| title_full | Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite |
| title_fullStr | Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite |
| title_full_unstemmed | Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite |
| title_short | Fast Gold Recovery from Aqueous Solutions and Assessment of Antimicrobial Activities of Novel Gold Composite |
| title_sort | fast gold recovery from aqueous solutions and assessment of antimicrobial activities of novel gold composite |
| topic | glycidyl methacrylate adsorption Au antimicrobial activity XPS |
| url | https://www.mdpi.com/2075-4701/13/11/1864 |
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