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  Application of High-Resolution Near-Infrared Imaging Spectroscopy to Detect Microplastic Particles in Different Environmental Compartments

Munz, M., Kreiß, J., Krüger, L., Schmidt, L. K., Bochow, M., Bednarz, M., Bannick, C. G., Oswald, S. E. (2023): Application of High-Resolution Near-Infrared Imaging Spectroscopy to Detect Microplastic Particles in Different Environmental Compartments. - Water, Air and Soil Pollution, 234, 286.
https://doi.org/10.1007/s11270-023-06245-4

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Munz, M.1, Autor
Kreiß, J.1, Autor
Krüger, L.1, Autor
Schmidt, L. K.1, Autor
Bochow, M.2, Autor              
Bednarz, Marius1, Autor
Bannick, C. G.1, Autor
Oswald, Sascha E.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
21.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146028              

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 Zusammenfassung: Microplastic particles (MPP) occur in various environmental compartments all over the world. They have been frequently investigated in oceans, freshwaters, and sediments, but studying their distribution in space and time is somewhat limited by the time-consuming nature of the available accurate detection strategies. Here, we present an enhanced application of lab-based near-infrared imaging (NIR) spectroscopy to identify the total number of MPP, classify polymer types, and determine particle sizes while maintaining short measuring times. By adding a microscopic lens to the hyperspectral camera and a cross slide table to the setup, the overall detectable particle size has been decreased to 100 µm in diameter. To verify and highlight the capabilities of this enhanced, semi-automated detection strategy, it was applied to key areas of microplastic research, such as a lowland river, the adjacent groundwater wells, and marine beach sediments. Results showed mean microplastic concentrations of 0.65 MPP/L in the Havel River close to Berlin and 0.004 MPP/L in the adjacent groundwater. The majority of MPP detected in the river were PP and PE. In 8 out of 15 groundwater samples, no MPP was found. Considering only the samples with quantifiable MPP, then on average 0.01 MPP/L was present in the groundwater (98.5% removal during bank filtration). The most abundant polymers in groundwater were PE, followed by PVC, PET, and PS. Mean MPP concentrations at two beaches on the German Baltic Sea coast were 5.5~MPP/kg at the natural reserve Heiligensee and Hüttelmoor and 47.5 MPP/kg at the highly frequented Warnemünde beach.

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 Datum: 2023-04-182023
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: DOI: 10.1007/s11270-023-06245-4
GFZPOF: p4 T5 Future Landscapes
GFZPOFCCA: p4 CARF RemSens
OATYPE: Hybrid Open Access
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Titel: Water, Air and Soil Pollution
Genre der Quelle: Zeitschrift, SCI, Scopus
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Seiten: - Band / Heft: 234 Artikelnummer: 286 Start- / Endseite: - Identifikator: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/20190702_020
Publisher: Springer Nature