TY - JOUR

T1 - Shields Diagram and the Incipient Motion of Microplastic Particles

AU - Goral, Koray Deniz

AU - Guler, Hasan Gokhan

AU - Larsen, Bjarke Eltard

AU - Carstensen, Stefan

AU - Christensen, Erik Damgaard

AU - Kerpen, Nils B

AU - Schlurmann, Torsten

AU - Fuhrman, David R

N1 - ACKNOWLEDGMENTS This research has been financially supported by the Independent Research Fund Denmark project MPCOAST: MicroPlastic transport processes in the COASTal environment, grant no. 0136-00227B. The second author additionally acknowledges financial support from The Scientific and Technical Research Council of Turkey (TUBITAK) under the 2219 International Postdoctoral Research Fellowship Programme. This support is greatly appreciated.

PY - 2023/6/27

Y1 - 2023/6/27

N2 - Incipient motion conditions for 57 regular (spheres, cylinders, disks, square plates, cubes, square prisms, rectangular prisms, tetrahedrons, and fibers) and eight irregular microplastic particle groups, having various sizes and densities, are investigated in a circular flume. The present data set is combined with additional data from the literature and systematically analyzed. A new framework is developed for predicting incipient motion conditions for foreign particles, accounting for variations in static friction, hydraulic roughness, and hiding-exposure effects. Via this framework, incipient motion conditions for microplastic particles lying on a sediment bed are, for the first time, reconciled with the classical Shields diagram.

AB - Incipient motion conditions for 57 regular (spheres, cylinders, disks, square plates, cubes, square prisms, rectangular prisms, tetrahedrons, and fibers) and eight irregular microplastic particle groups, having various sizes and densities, are investigated in a circular flume. The present data set is combined with additional data from the literature and systematically analyzed. A new framework is developed for predicting incipient motion conditions for foreign particles, accounting for variations in static friction, hydraulic roughness, and hiding-exposure effects. Via this framework, incipient motion conditions for microplastic particles lying on a sediment bed are, for the first time, reconciled with the classical Shields diagram.

KW - Shields parameter

KW - critical shear stress

KW - hiding-exposure

KW - hydraulic roughness

KW - nonbuoyant

KW - particle threshold

UR - http://www.scopus.com/inward/record.url?scp=85163828757&partnerID=8YFLogxK

U2 - 10.1021/acs.est.3c02027

DO - 10.1021/acs.est.3c02027

M3 - Article

C2 - 37322884

VL - 57

SP - 9362

EP - 9375

JO - Environmental Science & Technology

JF - Environmental Science & Technology

SN - 0013-936X

IS - 25

ER -