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The role of biofilm and hydrodynamics on the fate of microplastic particles in rivers: an experimental study

Zenodo (CERN European Organization for Nuclear Research) 2024 Score: 35 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Guilherme Calabro, Guilherme Calabro, Guilherme Calabro, Lucas Friceau Lucas Friceau Lucas Friceau Guilherme Calabro, Lucas Friceau, Rachid Dris, Lucas Friceau, Lucas Friceau, Rachid Dris, Rachid Dris, Rachid Dris, Guilherme Calabro, Guilherme Calabro, Alexis Simons, Guilherme Calabro, Andreas Lorke, Rachid Dris, Rachid Dris, Guilherme Calabro, Alexis Simons, Andreas Lorke, Andreas Lorke, Andreas Lorke, Alexis Simons, Andreas Lorke, Rachid Dris, Lucas Friceau Lucas Friceau Cédric Chaumont, Lucas Friceau, Lucas Friceau, Lucas Friceau, Lucas Friceau Bruno Tassin, Cédric Chaumont, Bruno Tassin, Bruno Tassin, Rachid Dris, Rachid Dris, Damien Lopez, Damien Lopez, Damien Lopez, Rachid Dris, Bruno Tassin, Rachid Dris, Rachid Dris, Rachid Dris, Lucas Friceau Cédric Chaumont, Damien Lopez, Damien Lopez, Lucas Friceau, Damien Lopez, Damien Lopez, Damien Lopez, Lucas Friceau, Bruno Tassin, Andreas Lorke, Bruno Tassin, Rachid Dris, Rachid Dris, Bruno Tassin, Bruno Tassin, Bruno Tassin, Lucas Friceau Lucas Friceau Bruno Tassin, Lucas Friceau, Bruno Tassin, Rachid Dris, Bruno Tassin, Cédric Chaumont, Cédric Chaumont, Andreas Lorke, Rachid Dris, Cédric Chaumont, Rachid Dris, Rachid Dris, Rachid Dris, Cédric Chaumont, Rachid Dris, Cédric Chaumont, Rachid Dris, Rachid Dris, Rachid Dris, Rachid Dris, Lucas Friceau, Lucas Friceau

Summary

Researchers conducted flume and field experiments to examine how biofilm formation and hydrodynamic conditions govern the fate of microplastic particles in rivers, investigating why some MP-polluted rivers crossing industrialized areas show no significant upstream-to-downstream concentration differences. The study identified biofilm-mediated density changes and turbulence as key factors controlling whether low-density MPs remain suspended or settle into sediments.

Polymers

Study Type Environmental

The transfer of microplastics particles (MP) from densely populated and industrialised areas to watercourses is particularly important but, some rivers crossing these types of territories present no significant MP concentration difference between upstream and downstream. At the same time low-density MP is found in the sediments. In general, three key parameters are hypothesized as governing the MP fate in aquatic environments: particle characteristics, interactions with biota, and hydrodynamics. The role of these parameters together on the dynamics of this MP dynamics in running water systems is yet to be explored to better estimate the temporality of MP displacement and its fate. In an experimental approach, we integrated the water column and sediment compartments, exploring the role of turbulence and biofilm on low-density MP dynamics. In a flume containing sediment and biofilm on it, the trajectory of standard particles of polyethylene polymer ( 50 µm) were followed at different flow velocities. A Particle Image Velocimeter setup followed by data processing using Particle Tracking Velocimetry allowed to retrace the trajectory of the particles near the sediment indicating their fate. We observed that increasing turbulence led to higher relative numbers of MP being in contact with the biofilm from 4 Also see: https://micro2024.sciencesconf.org/559204/document

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