Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/1968
DC Field | Value | Language |
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dc.contributor.author | Marin, Nicoleta Mirela | en_US |
dc.contributor.author | Ficai, Anton | en_US |
dc.contributor.author | Constantin, Lucian Alexandru | en_US |
dc.contributor.author | Motelica, Ludmila | en_US |
dc.contributor.author | Trusca, Roxana | en_US |
dc.date.accessioned | 2023-02-02T13:10:02Z | - |
dc.date.available | 2023-02-02T13:10:02Z | - |
dc.date.issued | 2022-12 | - |
dc.identifier.uri | http://hdl.handle.net/123456789/1968 | - |
dc.description | Polymers, vol. 14, 2022, 5523. https://doi.org/10.3390/polym14245523 | en_US |
dc.description.abstract | In this paper, two chelate resins prepared by a simple procedure were used for the removal of Cd2+, Ni2+, Cu2+, and Pb2+ (M2+) from aqueous solutions. Amberlite IRA 402 strongly basic anion exchange resin in Cl− form (IRA 402(Cl−) together with Amberlite XAD7HP acrylic ester copolymer (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 (Qe) was obtained when the DR 23 solution was adjusted at a pH of 2 and 7.9. The Qeof 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 M2+ removal determined by the atomic adsorption spectrometry method (AAS). The M2+ removal by the IRA 402-DR 23 and XAD7HP-DR 23 showed that the latter is more efficient for this purpose. As a consequence, for divalent ions, the chelated resins followed the selectivity sequence: Cd2+ > Cu2+ > Ni2+ > Pb2+. Additionally, Cd2+, Cu2+, and Ni2+ removal was fitted very well with the Freundlich model in terms of height correlation coefficient (R2), while Pb2+ was best fitted with Langmuir model for IRA 402-DR 23, the Cu2+ removal is described by the Langmuir model, and Cd2+, Ni2+ and Pb2+ removal was found to be in concordance with the Freundlich model for XAD7HP-DR 23. The M2+ elution from the chelate resins was carried out using 2 M HCl. The greater M2+ recovery from chelating resin mass confirmed their sustainability. The chelate resins used before and after M2+ removal by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were evaluated. | en_US |
dc.language.iso | en | en_US |
dc.publisher | MDPI | en_US |
dc.subject | Amberlite XAD7HP | en_US |
dc.subject | Amberlite IRA 402 | en_US |
dc.subject | Ion exchange mechanism | en_US |
dc.subject | π-π interactions | en_US |
dc.subject | Chelation | en_US |
dc.subject | Simultaneous enrichment | en_US |
dc.subject | Higher selectivity | en_US |
dc.subject | Cadmium | en_US |
dc.subject | Nickel | en_US |
dc.subject | Copper | en_US |
dc.subject | Lead | en_US |
dc.title | New Chelate Resins Prepared with Direct Red 23 for Cd2+, Ni2+, Cu2+ and Pb2+ Removal | en_US |
dc.type | research article | en_US |
dc.contributor.affiliation | National Research and Development Institute for Industrial Ecology, ECOIND | en_US |
dc.contributor.affiliation | University Politehnica of Bucharest, Romania | en_US |
dc.contributor.affiliation | National Research and Development Institute for Industrial Ecology, ECOIND | en_US |
dc.contributor.affiliation | University Politehnica of Bucharest, Romania | en_US |
dc.contributor.affiliation | University Politehnica of Bucharest, Romania | en_US |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | research article | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.author.dept | National Research and Development Institute for Industrial Ecology, ECOIND | - |
crisitem.author.dept | University Politehnica of Bucharest, Romania | - |
crisitem.author.dept | National Research and Development Institute for Industrial Ecology, ECOIND | - |
crisitem.author.dept | University Politehnica of Bucharest, Romania | - |
crisitem.author.dept | University Politehnica of Bucharest, Romania | - |
crisitem.author.orcid | 0000-0002-9145-7502 | - |
crisitem.author.orcid | 0000-0001-9958-1455 | - |
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polymers-14-05523.pdf | Article | 1.54 MB | Adobe PDF | View/Open |
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