Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/ED2BAAB0-7EEF-4F42-8959-3CEC06435170 | - |
| Αναγνωριστικό | https://doi.org/10.1016/j.scitotenv.2019.134099 | - |
| Αναγνωριστικό | https://www.sciencedirect.com/science/article/pii/S0048969719340768 | - |
| Γλώσσα | en | - |
| Μέγεθος | 14 pages | en |
| Τίτλος | Solid-state polymer membranes for simple, sensitive, and low-cost monitoring of mercury in water | en |
| Δημιουργός | Kallithrakas-Kontos Nikolaos | en |
| Δημιουργός | Καλλιθρακας-Κοντος Νικολαος | el |
| Δημιουργός | Foteinis Spyridon | en |
| Δημιουργός | Φωτεινης Σπυριδων | el |
| Δημιουργός | Vazgiouraki Eleftheria | en |
| Δημιουργός | Βαζγιουρακη Ελευθερια | el |
| Δημιουργός | Karydas Andreas G. | en |
| Δημιουργός | Osán János | en |
| Δημιουργός | Chatzisymeon Efthalia | en |
| Δημιουργός | Χατζησυμεων Ευθαλια | el |
| Εκδότης | Elsevier | en |
| Περίληψη | Solid-state Hg(II) selective membranes were produced and assessed by means of X-ray absorption near edge structure in the total reflection X-ray fluorescence (TXRF-XANES) setup and by the energy dispersive X-ray fluorescence (EDXRF) technique. Membranes were functionalized using four promising ligands for mercury complexation, i.e.: i) 4-(2-Pyridylazo) resorcinol (PAR), ii) thiourea, iii) calconcarboxylic acid (CCS), and iv) dithizone. A simple analytical procedure was followed, using miniscule reagent quantities, thus suggesting the process is also cost-effective. TXRF-XANES revealed that mercury complexes with the ligands, and is not simply adsorbed onto the PVC matrix, while the complexation was found to not be affected by the matrix existence. Mercury exhibited an increased oxidation grade and was covalently bound to the ligand functional groups, via a strong chemical bond. EDXRF revealed that the solid-state membranes can be used for mercury speciation and trace analysis from environmentally relevant matrices, such as tap water. The membranes could be a promising alternative to polymer inclusion membranes (PIMs), due to their simple configuration and high Hg (II) selectivity in aqueous media, but more research is needed. PAR appears to be the most promising ligand, followed by dithizone and thiourea. CCS had a minuscule preconcentration efficiency since it was preferably bound with Cu in tap water, indicating limited usefulness for mercury preconcentration. However, results suggest that, depending on the ligand, the solid-state membranes could be also possibly used for multi-elemental heavy metals analysis in water. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2020-04-01 | - |
| Ημερομηνία Δημοσίευσης | 2019 | - |
| Θεματική Κατηγορία | Divalent mercury | en |
| Θεματική Κατηγορία | Elettra Sinchrotron Trieste (EST) | en |
| Θεματική Κατηγορία | Heavy metal pollution | en |
| Θεματική Κατηγορία | Mercury complexation | en |
| Θεματική Κατηγορία | Synchrotron radiation-induced XANES | en |
| Θεματική Κατηγορία | The International Atomic Energy Agency (IAEA) | en |
| Βιβλιογραφική Αναφορά | N. Kallithrakas-Kontos, S. Foteinis, E.M. Vazgiouraki, A.G. Karydas, J. Osán and E. Chatzisymeon, "Solid-state polymer membranes for simple, sensitive, and low-cost monitoring of mercury in water," Sci. Total Environ., vol. 697, Dec. 2019. doi: 10.1016/j.scitotenv.2019.134099 | en |
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