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Microplastics and Nanoplastics
Fig. 1 | Microplastics and Nanoplastics

Fig. 1

From: Transport and retention of micro-polystyrene in coarse riverbed sediments: effects of flow velocity, particle and sediment sizes

Fig. 1

a Top view of columns (Ø = 8 cm) filled with medium gravel, d50 = 6.60 mm (left) and coarse sand, d50 = 1.51 mm (right); b Fragments of fluorescent polystyrene particles within size class 500–1000 μm (left) and 250–500 μm (right); c Top view of columns covered with brass spacer ring filled with gravel (left) as well as sealing ring and 10 μm stainless steel mesh (right); d Sketch of the column setup (not to scale; column Ø = 8 cm and L = 50 cm); and e Sketch of the self-made sediment extraction pushing device

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