Experimental Study on the Incipient Motion of Microplastic Particles with Different Shapes, Sizes, and Densities on a Live Sediment Bed

K. D. Goral*, H. G. Guler, B. E. Larsen, S. Carstensen, E. D. Christensen, N. B. Kerpen, T. Schlurmann, D. R. Fuhrman

*Corresponding author for this work

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Abstract

The present study aims to add a novel data set on the incipient motion of a broader array of microplastic particles, on a live sediment bed comprised of finer sediment grains than those used by WS19. The incipient motion of 65 microplastic particle groups, having both regular (57) and irregular (eight) shapes, are investigated experimentally in a circular flume. Regular shapes considered include spheres, circular cylinders, circular disks, square plates, cubes, square prisms, rectangular prisms, tetrahedrons, and fibers. The present data set is combined with another from the literature, and the incipient motion conditions of the collective particles are systematically analyzed. After accounting for (1) differences in static friction as well as (2) hiding-exposure effects, reasonable agreement with the classical Shields curve for the incipient motion of sediments is achieved. These results provide deeper understanding of the fundamental transport properties and patterns of microplastic particles, on which is based the development of any successful management strategies.
Original languageEnglish
Title of host publicationThe Proceedings of the Coastal Sediments 2023
EditorsPing Wang, Elizabeth Royer, Julie D. Rosati
Place of PublicationSingapore
PublisherWorld Scientific
Publication date2023
Pages1149–1155
ISBN (Electronic)978-981-12-7513-5, 978-981-127-514-2
DOIs
Publication statusPublished - 2023
EventCoastal Sediments 2023 - New Orleans, United States
Duration: 11 Apr 202315 Apr 2023

Conference

ConferenceCoastal Sediments 2023
Country/TerritoryUnited States
CityNew Orleans
Period11/04/202315/04/2023

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