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13 results on '"Vinciguerra, Virginia"'

2. Understanding the Source, Distribution, and Fate of Micro- and Nanoplastics in Natural Water Bodies

Author

Castelvetro, Valter, Corti, Andrea, Ceccarini, Alessio, La Nasa, Jacopo, Lomonaco, Tommaso, Manariti, Antonella, Manco, Enrico, Modugno, Francesca, Vinciguerra, Virginia, Förstner, Ulrich, Series Editor, Rulkens, Wim H., Series Editor, Salomons, Wim, Series Editor, Ksibi, Mohamed, editor, Ghorbal, Achraf, editor, Chakraborty, Sudip, editor, Chaminé, Helder I., editor, Barbieri, Maurizio, editor, Guerriero, Giulia, editor, Hentati, Olfa, editor, Negm, Abdelazim, editor, Lehmann, Anthony, editor, Römbke, Jörg, editor, Costa Duarte, Armando, editor, Xoplaki, Elena, editor, Khélifi, Nabil, editor, Colinet, Gilles, editor, Miguel Dias, João, editor, Gargouri, Imed, editor, Van Hullebusch, Eric D., editor, Sánchez Cabrero, Benigno, editor, Ferlisi, Settimio, editor, Tizaoui, Chedly, editor, Kallel, Amjad, editor, Rtimi, Sami, editor, Panda, Sandeep, editor, Michaud, Philippe, editor, Sahu, Jaya Narayana, editor, Seffen, Mongi, editor, and Naddeo, Vincenzo, editor

Published
2021
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12. Thorough Multianalytical Characterization and Quantification of Micro- and Nanoplastics from Bracciano Lake's Sediments

Author

Andrea Corti, Antonella Manariti, Valter Castelvetro, Mario Cifelli, Valentina Iannilli, Loris Pietrelli, Virginia Vinciguerra, Sabrina Bianchi, Antonella Petri, Valentina Domenici, Iannilli, Valentina, Pietrelli, Lori, Corti, Andrea, Vinciguerra, Virginia, Manariti, Antonella, Bianchi, Sabrina, Petri, Antonella, Cifelli, Mario, Domenici, Valentina, and Castelvetro, Valter

Subjects
NMR-DOSY, Microplastics, separation, microplastics, lcsh:TJ807-830, Geography, Planning and Development, lcsh:Renewable energy sources, 02 engineering and technology, Fractionation, 010501 environmental sciences, Management, Monitoring, Policy and Law, 01 natural sciences, chemistry.chemical_compound, nanoplastics, freshwater sediment, liquid chromatography, PET, polyolefins, NMR‐DOSY, lcsh:Environmental sciences, 0105 earth and related environmental sciences, lcsh:GE1-350, chemistry.chemical_classification, Renewable Energy, Sustainability and the Environment, Depolymerization, lcsh:Environmental effects of industries and plants, nanoplastic, Polymer, Contamination, 021001 nanoscience & nanotechnology, lcsh:TD194-195, chemistry, Environmental chemistry, Attenuated total reflection, Molar mass distribution, Polystyrene, 0210 nano-technology, microplastic
Abstract

Lake basins can behave as accumulators of microplastics released in wastewaters as such or resulting from degradation of larger items before and/or during their journey toward the marine environment as a final sink. A novel multianalytical approach was adopted for the detection and quantification of microplastics with size &lt, 2 mm in the sediments of the volcanic lake of Bracciano, Italy. Simple analytical techniques such as solvent extraction/fractionation (for polyolefins and polystyrene) or depolymerization (for polyethylene terephthalate, PET), along with chromatographic detection (SEC and HPLC), allowed quantitative and qualitative determination of the main synthetic polymer contaminants. In particular, PET microplastic concentrations of 0.8&ndash, 36 ppm were found, with variability related to the sampling site (exposure to incoming winds and wave action). Proton Nuclear Magnetic Resonance (1H-NMR) and Attenuated Total Reflectance Fourier Transformed InfraRed (ATR-FTIR spectroscopic investigations supported the identification and chemical characterization of plastic fragments and polymer extracts. The average molecular weight of solvent extractable polymers was evaluated from 2D 1H-NMR diffusion ordered spectroscopy (DOSY) experiments. The proposed, easily accessible multianalytical approach can be considered as a useful tool for improving our knowledge on the nature and the concentration of microplastics in sediments, giving insights on the impact of human activities on the health status of aquatic ecosystems.

Published
2020

13. Microplastics in fish meal: Contamination level analyzed by polymer type, including polyester (PET), polyolefins, and polystyrene.

Author

Castelvetro V, Corti A, Bianchi S, Giacomelli G, Manariti A, and Vinciguerra V

Abstract

Fish meal (FM) is an industrial product, mainly obtained from whole wild-caught fish, that is used as a high protein feedstuff component in aquaculture and intensive animal farming. Contamination of FM by microplastics (MPs), the synthetic polymer particles known to be nearly ubiquitous in the marine environment, is a likely consequence of their ingestion by zooplankton and other small marine animals that through the food chain end up in the fish commercialized not only for direct human consumption but also for the industrial production of FM. Unfortunately, analytical tools for quantifying contamination of FM by synthetic polymers are not available. A newly developed procedure described here allows quantification of the total amounts of polyolefins (including ethene and propene homo- and copolymers), polystyrene (PS), and poly(ethylene terephthalate) (PET), respectively, in FM. The multi-step procedure involves a sequence of solvent extractions, hydrolytic treatments to remove the biogenic matrix mainly consisting of proteins and some lipids, and selective depolymerization for PET. The gravimetric and SEC-UV techniques employed for the quantification of polyolefins and PS, respectively, only allowed to estimate their concentration in FM at around or below 100 mg/kg each, a more accurate quantification being prevented by the interference from the organic matrix and, in the case of polyolefins, by the limited sensitivity of the quantification by gravimetry. On the other hand, the contamination by PET MPs could accurately be quantified at 12.9 mg/kg based on the dry FM mass. Ways to overcome the sensitivity limitations for PS and polyolefins by using e.g. pyrolysis-GC/MS are highlighted., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Published
2020
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