Development of New Methods for the Extraction and Passive Recovery of Organic and Inorganic Micropollutants using Hybrid Micro/Nano-sorbent Materials
Φόρτωση...
Ημερομηνία
Συγγραφείς
Gouma, Vasiliki
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The presence of pollutants—including organic and inorganic compounds, oxyanions, and various bio-organisms—in aquatic and terrestrial systems poses significant risks to environmental health, human well-being, and food chains. This underscores the urgent need for innovative and effective purification technologies for environmental remediation. This study introduces fabric phase sorptive extraction (FPSE) as a novel, eco-friendly sample preparation technique that addresses many limitations of traditional methods. FPSE offers multiple advantages: it is easy to use, minimizes solvent consumption, supports a diverse range of sorbents, and provides a high surface area for efficient analyte interaction. FPSE is also stable across a broad pH spectrum, enhances analyte diffusion through magnetic stirring, facilitates rapid back-extraction with minimal solvent, reduces sample preparation steps to minimize errors, and can detect analytes at trace levels (ng/L).
In the present study we introduce the use of MOFs immobilized on cotton fabrics as a sorbent phase for the fabric phase sorptive extraction and passive sampling of non-polar organic compounds from water samples. A water-stable, Zr4+-based MOF (UiO-66(Zr)-NH2) was irreversibly immobilized on polydopamine decorated cotton through a step-wise synthetic procedure that maximized the amount of MOF immobilized on the fabric surface. In this manner it was possible to combine the permeability and the large contact surface area of the host cotton substrate with the high specific surface area and sorption capacity of the MOF. The MOF@cotton composite was used as a new sorbent phase for the fabric phase sorptive extraction of UV filters, as model organic compounds, not only under static (i.e. stirring assisted) but also in dynamic, flow-through extraction mode (i.e. as a solid phase extraction sorbent phase), producing satisfactory analytical results in terms of linearity of calibration curves (10-250 μg L-1), precision (<11%), detection limits <10 μg L-1 (using a single wavelength UV detector) and recoveries (86 - 119%) from various natural water samples. As a passive sampling sorbent phase, the MOF@cotton composite could linearly accumulate UV filters over time period of 35 days with sampling rates from 0.026-0.352 L d-1, which are comparable to other passive sampling sorbent phases.
The Zr4+-based MOF (UiO-66(Zr)-NH3+ or MOR-1) was also tested as a novel material for the remediation of contaminated soils by in-situ extraction of soil contaminants on retrievable sorbents. The remediation process is based on adding cotton fabric sheets decorated with metal-organic frameworks in a contaminated soil matrix, followed by mixing to sorb the contaminants. The MOF-modified cotton fabric is then easily recovered to extract the contaminants from the soil. The remediation efficiency was optimized regarding the fabric surface area per soil mass, the soil moisture capacity, and the remediation time, yielding satisfactory removal efficiencies (43-90%) for most compounds in 60 days. Notably, the sorbent could be reused up to 5 times after eluting the organic compounds and exhibited good stability in aqueous and acidic media, enabling its safe disposal. The method offers a practical solution for in-situ soil remediation and paves the way for future applications, exploring bulk-supported nanosorbent materials.
Additionally in this work, aiming to address the lack of passive sampling sorbent phases for nanoparticle species, we designed a new sorbent phase consisting of a novel Zr-MOF material with thiophene functional groups called MOR-3 and immobilized it onto a bulk support comprised of cotton fabrics. The MOR-3@cotton composite was used as a new sorbent phase for the fabric phase sorptive extraction of AuNPs, as model nanoparticle species, not only under static (i.e. stirring assisted) but also in dynamic, flow-through extraction mode (i.e. as a solid phase extraction sorbent phase), producing satisfactory analytical results in terms of linearity of calibration curves in the range of 0.2-20 nM of 4 nm PVP@AuNPs (or to 0.05-8.0 μg Au /mL) at pH 3, precision (<9%) and detection limits of 0.18 nM (0.045 μg Au /mL). Recovery experiments in environmental water samples of different matrix complexities (i.e. river water, lake water and seawater) were also examined and the results show that the method effectively extracts both AuNPs and Au ions with recoveries ranging from 80.8% to 115%. As a passive sampling sorbent phase, the MOR-3@fabric composite could linearly accumulate AuNPs over time period of 110 days, which is significantly higher than most passive samples used for inorganic ions and good sampling rate (Rs=2.1 mL/h), which is comparable to those obtained with commercial passive samplers for metal.
Περιγραφή
Λέξεις-κλειδιά
Microextraction, Fabric phase sorptive extraction, Solid phase microextraction, Passive recovery, Emerging pollutants, Nanosorbent materials, Metal-organic frameworks, Organic pollutants, Precious metal nanoparticles, Pollutants recovery, Environmental remediation, Water purification
Θεματική κατηγορία
Sciences
Παραπομπή
Σύνδεσμος
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
Όνομα επιβλέποντος
Giokas, Dimosthenis
Εξεταστική επιτροπή
Vlessidis, Athanasios
Βλεσσίδης, Αθανάσιος
Τσόγκας, Γεώργιος
Manos, Emmanouil
Μάνος, Εμμανουήλ
Hela, Dimitra
Χελά, Δήμητρα
Stalikas, Constantine
Σταλίκας, Κωνσταντίνος
Plakatouras, John
Πλακατούρας, Ιωάννης
Tsogas, George
Βλεσσίδης, Αθανάσιος
Τσόγκας, Γεώργιος
Manos, Emmanouil
Μάνος, Εμμανουήλ
Hela, Dimitra
Χελά, Δήμητρα
Stalikas, Constantine
Σταλίκας, Κωνσταντίνος
Plakatouras, John
Πλακατούρας, Ιωάννης
Tsogas, George
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών
Πίνακας περιεχομένων
Χορηγός
Βιβλιογραφική αναφορά
Ονόματα συντελεστών
Αριθμός σελίδων
285