Tracking Microplastics Across the Streambed Interface : Using Laser‐Induced‐Fluorescence to Quantitatively Analyze Microplastic Transport in an Experimental Flume

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00006105
URN to cite this document: urn:nbn:de:bvb:703-epub-6105-6

Title data

Boos, Jan-Pascal ; Gilfedder, Benjamin Silas ; Frei, Sven:
Tracking Microplastics Across the Streambed Interface : Using Laser‐Induced‐Fluorescence to Quantitatively Analyze Microplastic Transport in an Experimental Flume.
In: Water Resources Research. Vol. 57 (2021) Issue 12 . - No. e2021WR031064.
ISSN 1944-7973
DOI der Verlagsversion: https://doi.org/10.1029/2021WR031064

	Format: PDF Name: Water Resources Research - 2021 - Boos - Tracking Microplastics Across the Streambed Interface Using.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Project information

Project financing:	Deutsche Forschungsgemeinschaft

Abstract

Rivers and streams are a primary transport vector for microplastics (MPs), connecting terrestrial sources to marine environments. While previous studies indicated that pore-scale MPs can accumulate in streambed sediments, the specific MPs transport and retention mechanisms in fluvial systems remain poorly understood. As part of this technical note, we present a novel method for a quantitative analysis of the spatiotemporal transport and retention of pore-scale MPs in an experimental flume. A continuous mass balance for MPs in surface water was achieved using two online fluorometers, while a laser-induced Fluorescence-Imaging-System was developed to track and quantify the spatial migration of MPs through the streambed sediments. The detection limit was < 1 µg/L for 1 µm polystyrene microbeads with the fluorometers and 3 µg/L for the Fluorescence-Imaging-System. The system was able to quantitatively track the advective transfer of MPs into the streambed sediments: a process that has yet not been observed experimentally. Results showed that MPs infiltrated into the streambed sediments up to a depth twice the bedform amplitude. This work provides a novel experimental method to quantitatively monitor MP transport through porous media and advective exchange of MP across the streambed interface.

Further data

Item Type:	Article in a journal
Keywords:	microplastics; fluvial systems; hyporheic interface; laser-induced fluoroscence; streambed sediments; advective transfer
DDC Subjects:	500 Science > 550 Earth sciences, geology
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology > Chair Hydrology - Univ.-Prof. Dr. Stefan Peiffer Research Institutions > Collaborative Research Centers, Research Unit > SFB 1357 - MIKROPLASTIK Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology Research Institutions Research Institutions > Collaborative Research Centers, Research Unit
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-6105-6
Date Deposited:	08 Apr 2022 07:12
Last Modified:	08 Apr 2022 07:13
URI:	https://epub.uni-bayreuth.de/id/eprint/6105

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