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New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal
In this paper, two chelate resins prepared by a simple procedure were used for the removal of Cd(2+), Ni(2+), Cu(2+), and Pb(2+) (M(2+)) from aqueous solutions. Amberlite IRA 402 strongly basic anion exchange resin in Cl(−) form (IRA 402 (Cl(−)) together with Amberlite XAD7HP acrylic ester co-polyme...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9786727/ https://www.ncbi.nlm.nih.gov/pubmed/36559890 http://dx.doi.org/10.3390/polym14245523 |
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author | Marin, Nicoleta Mirela Ficai, Anton Constantin, Lucian Alexandru Motelica, Ludmila Trusca, Roxana |
author_facet | Marin, Nicoleta Mirela Ficai, Anton Constantin, Lucian Alexandru Motelica, Ludmila Trusca, Roxana |
author_sort | Marin, Nicoleta Mirela |
collection | PubMed |
description | In this paper, two chelate resins prepared by a simple procedure were used for the removal of Cd(2+), Ni(2+), Cu(2+), and Pb(2+) (M(2+)) from aqueous solutions. Amberlite IRA 402 strongly basic anion exchange resin in Cl(−) form (IRA 402 (Cl(−)) together with Amberlite XAD7HP acrylic ester co-polymer (XAD7HP) were functionalized with chelating agent Direct red 23 (DR 23). The chelate resins (IRA 402-DR 23 and XAD7HP-DR 23) were obtained in batch mode. The influence of interaction time, pH and the initial concentration of DR 23 solution was investigated using UV-Vis spectrometry. The time necessary to reach equilibrium was 90 min for both resins. A negligible effect of adsorption capacity (Q(e)) was obtained when the DR 23 solution was adjusted at a pH of 2 and 7.9. The Q(e) of the XAD7HP resin (27 mg DR 23/g) is greater than for IRA 402 (Cl(−)) (21 mg DR 23/g). The efficiency of chelating resins was checked via M(2+) removal determined by the atomic adsorption spectrometry method (AAS). The M(2+) removal by the IRA 402-DR 23 and XAD7HP-DR 23 showed that the latter is more efficient for this propose. As a consequence, for divalent ions, the chelated resins followed the selectivity sequence: Cd(2+) > Cu(2+) > Ni(2+) > Pb(2+). Additionally, Cd(2+), Cu(2+) and Ni(2+) removal was fitted very well with the Freundlich model in terms of height correlation coefficient (R(2)), while Pb(2+) was best fitted with Langmuir model for IRA 402-DR 23, the Cu(2+) removal is described by the Langmuir model, and Cd(2+), Ni(2+) and Pb(2+) removal was found to be in concordance with the Freundlich model for XAD7HP-DR 23. The M(2+) elution from the chelate resins was carried out using 2 M HCl. The greater M(2+) recovery from chelating resins mass confirmed their sustainability. The chelate resins used before and after M(2+) removal by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were evaluated. |
format | Online Article Text |
id | pubmed-9786727 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-97867272022-12-24 New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal Marin, Nicoleta Mirela Ficai, Anton Constantin, Lucian Alexandru Motelica, Ludmila Trusca, Roxana Polymers (Basel) Article In this paper, two chelate resins prepared by a simple procedure were used for the removal of Cd(2+), Ni(2+), Cu(2+), and Pb(2+) (M(2+)) from aqueous solutions. Amberlite IRA 402 strongly basic anion exchange resin in Cl(−) form (IRA 402 (Cl(−)) together with Amberlite XAD7HP acrylic ester co-polymer (XAD7HP) were functionalized with chelating agent Direct red 23 (DR 23). The chelate resins (IRA 402-DR 23 and XAD7HP-DR 23) were obtained in batch mode. The influence of interaction time, pH and the initial concentration of DR 23 solution was investigated using UV-Vis spectrometry. The time necessary to reach equilibrium was 90 min for both resins. A negligible effect of adsorption capacity (Q(e)) was obtained when the DR 23 solution was adjusted at a pH of 2 and 7.9. The Q(e) of the XAD7HP resin (27 mg DR 23/g) is greater than for IRA 402 (Cl(−)) (21 mg DR 23/g). The efficiency of chelating resins was checked via M(2+) removal determined by the atomic adsorption spectrometry method (AAS). The M(2+) removal by the IRA 402-DR 23 and XAD7HP-DR 23 showed that the latter is more efficient for this propose. As a consequence, for divalent ions, the chelated resins followed the selectivity sequence: Cd(2+) > Cu(2+) > Ni(2+) > Pb(2+). Additionally, Cd(2+), Cu(2+) and Ni(2+) removal was fitted very well with the Freundlich model in terms of height correlation coefficient (R(2)), while Pb(2+) was best fitted with Langmuir model for IRA 402-DR 23, the Cu(2+) removal is described by the Langmuir model, and Cd(2+), Ni(2+) and Pb(2+) removal was found to be in concordance with the Freundlich model for XAD7HP-DR 23. The M(2+) elution from the chelate resins was carried out using 2 M HCl. The greater M(2+) recovery from chelating resins mass confirmed their sustainability. The chelate resins used before and after M(2+) removal by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were evaluated. MDPI 2022-12-16 /pmc/articles/PMC9786727/ /pubmed/36559890 http://dx.doi.org/10.3390/polym14245523 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Marin, Nicoleta Mirela Ficai, Anton Constantin, Lucian Alexandru Motelica, Ludmila Trusca, Roxana New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal |
title | New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal |
title_full | New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal |
title_fullStr | New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal |
title_full_unstemmed | New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal |
title_short | New Chelate Resins Prepared with Direct Red 23 for Cd(2+), Ni(2+), Cu(2+) and Pb(2+) Removal |
title_sort | new chelate resins prepared with direct red 23 for cd(2+), ni(2+), cu(2+) and pb(2+) removal |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9786727/ https://www.ncbi.nlm.nih.gov/pubmed/36559890 http://dx.doi.org/10.3390/polym14245523 |
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