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- W4313402913 abstract "Abstract The dominant mechanisms controlling the concentration and transport of microplastics (MPs) in riverine systems are not fully understood yet. Polystyrene (PS) is a highly abundant MP in streams and rivers. This study investigated the impact of large roughness elements (LREs) on in-stream transport and retention patterns of polystyrene-microplastics (PS-MPs). Experiments were conducted with and without LREs under a range of shear Reynolds numbers (𝑅 𝑒 ∗ ) in an eco-hydraulics flume. We found a clear dependence of MPs’ velocity on 𝑅 𝑒 ∗ in LREs-dominated channel. The results also revealed that the LREs-generated turbulence kinetic energy ( TKE ) can be a good predictor of PS-MPs transport and retention rate. This indicates the effectiveness of TKE in retaining PS-MPs as they travel through streams and rivers. The presence of LREs increases the PS-MPs capture and decreases their velocity of transport. This suggests that PS-MPs retention can be increased by increasing the LRE density in reverine systems." @default.
- W4313402913 created "2023-01-06" @default.
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- W4313402913 date "2022-12-19" @default.
- W4313402913 modified "2023-10-15" @default.
- W4313402913 title "The Effects of Large Roughness Elements on the In-stream Transport and Retention of Polystyrene Microplastics" @default.
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- W4313402913 doi "https://doi.org/10.21203/rs.3.rs-2363565/v1" @default.
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