Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of Pesticides
Solid-phase extraction (SPE) coupled to LC/MS/MS analysis is a valid approach for the determination of organic micropollutants (OMPs) in liquid samples. To remove the greatest number of OMPs from environmental matrices, the development of innovative sorbent materials is crucial. Recently, much atten...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/22/16/8374 |
| _version_ | 1797523614451367936 |
|---|---|
| author | Ilaria Silvestro Clarissa Ciarlantini Iolanda Francolini Pierpaolo Tomai Alessandra Gentili Chiara Dal Bosco Antonella Piozzi |
| author_facet | Ilaria Silvestro Clarissa Ciarlantini Iolanda Francolini Pierpaolo Tomai Alessandra Gentili Chiara Dal Bosco Antonella Piozzi |
| author_sort | Ilaria Silvestro |
| collection | DOAJ |
| description | Solid-phase extraction (SPE) coupled to LC/MS/MS analysis is a valid approach for the determination of organic micropollutants (OMPs) in liquid samples. To remove the greatest number of OMPs from environmental matrices, the development of innovative sorbent materials is crucial. Recently, much attention has been paid to inorganic nanosystems such as graphite-derived materials. Graphene oxide has been employed in water-purification processes, including the removal of several micropollutants such as dyes, flame retardants, or pharmaceutical products. Polysaccharides have also been widely used as convenient media for the dispersion of sorbent materials, thanks to their unique properties such as biodegradability, biocompatibility, nontoxicity, and low cost. In this work, chitosan–graphene oxide (CS_GO) composite membranes containing different amounts of GO were prepared and used as sorbents for the SPE of pesticides. To improve their dimensional stability in aqueous medium, the CS_GO membranes were surface crosslinked with glutaraldehyde. The composite systems were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, swelling degree, contact angle, and mechanical measurements. As the GO content increased, a decrease in surface homogeneity, an improvement of mechanical properties, and a reduction of thermal stability of the CS-based membranes were observed. The increased dimensional stability in water, together with the presence of high GO amounts, made the prepared composite membranes more efficacious than the ones based just on CS in isolating and preconcentrating different hydrophilic/hydrophobic pollutants. |
| first_indexed | 2024-03-10T08:45:31Z |
| format | Article |
| id | doaj.art-19ecd2c9f0c948e39d37b8974d059ba5 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T08:45:31Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-19ecd2c9f0c948e39d37b8974d059ba52023-11-22T07:54:08ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-08-012216837410.3390/ijms22168374Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of PesticidesIlaria Silvestro0Clarissa Ciarlantini1Iolanda Francolini2Pierpaolo Tomai3Alessandra Gentili4Chiara Dal Bosco5Antonella Piozzi6Department of Chemistry, Sapienza University of Rome, 00185 Rome, ItalyDepartment of Chemistry, Sapienza University of Rome, 00185 Rome, ItalyDepartment of Chemistry, Sapienza University of Rome, 00185 Rome, ItalyDepartment of Chemistry, Sapienza University of Rome, 00185 Rome, ItalyDepartment of Chemistry, Sapienza University of Rome, 00185 Rome, ItalyDepartment of Chemistry, Sapienza University of Rome, 00185 Rome, ItalyDepartment of Chemistry, Sapienza University of Rome, 00185 Rome, ItalySolid-phase extraction (SPE) coupled to LC/MS/MS analysis is a valid approach for the determination of organic micropollutants (OMPs) in liquid samples. To remove the greatest number of OMPs from environmental matrices, the development of innovative sorbent materials is crucial. Recently, much attention has been paid to inorganic nanosystems such as graphite-derived materials. Graphene oxide has been employed in water-purification processes, including the removal of several micropollutants such as dyes, flame retardants, or pharmaceutical products. Polysaccharides have also been widely used as convenient media for the dispersion of sorbent materials, thanks to their unique properties such as biodegradability, biocompatibility, nontoxicity, and low cost. In this work, chitosan–graphene oxide (CS_GO) composite membranes containing different amounts of GO were prepared and used as sorbents for the SPE of pesticides. To improve their dimensional stability in aqueous medium, the CS_GO membranes were surface crosslinked with glutaraldehyde. The composite systems were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, swelling degree, contact angle, and mechanical measurements. As the GO content increased, a decrease in surface homogeneity, an improvement of mechanical properties, and a reduction of thermal stability of the CS-based membranes were observed. The increased dimensional stability in water, together with the presence of high GO amounts, made the prepared composite membranes more efficacious than the ones based just on CS in isolating and preconcentrating different hydrophilic/hydrophobic pollutants.https://www.mdpi.com/1422-0067/22/16/8374chitosan–graphene oxide membranessolid-phase extractionpollutantschitosangraphene oxide |
| spellingShingle | Ilaria Silvestro Clarissa Ciarlantini Iolanda Francolini Pierpaolo Tomai Alessandra Gentili Chiara Dal Bosco Antonella Piozzi Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of Pesticides International Journal of Molecular Sciences chitosan–graphene oxide membranes solid-phase extraction pollutants chitosan graphene oxide |
| title | Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of Pesticides |
| title_full | Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of Pesticides |
| title_fullStr | Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of Pesticides |
| title_full_unstemmed | Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of Pesticides |
| title_short | Chitosan–Graphene Oxide Composite Membranes for Solid-Phase Extraction of Pesticides |
| title_sort | chitosan graphene oxide composite membranes for solid phase extraction of pesticides |
| topic | chitosan–graphene oxide membranes solid-phase extraction pollutants chitosan graphene oxide |
| url | https://www.mdpi.com/1422-0067/22/16/8374 |
| work_keys_str_mv | AT ilariasilvestro chitosangrapheneoxidecompositemembranesforsolidphaseextractionofpesticides AT clarissaciarlantini chitosangrapheneoxidecompositemembranesforsolidphaseextractionofpesticides AT iolandafrancolini chitosangrapheneoxidecompositemembranesforsolidphaseextractionofpesticides AT pierpaolotomai chitosangrapheneoxidecompositemembranesforsolidphaseextractionofpesticides AT alessandragentili chitosangrapheneoxidecompositemembranesforsolidphaseextractionofpesticides AT chiaradalbosco chitosangrapheneoxidecompositemembranesforsolidphaseextractionofpesticides AT antonellapiozzi chitosangrapheneoxidecompositemembranesforsolidphaseextractionofpesticides |