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Quantifying microplastic residence times in lakes using mesocosm experiments and 1D random walk model

2024 Score: 35 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Sven Frei Hassan Elagami, Hassan Elagami, Hassan Elagami, Hassan Elagami, Hassan Elagami, Sven Frei Benjamin Gilfedder, Hassan Elagami, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Hassan Elagami, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Hassan Elagami, Hassan Elagami, Hassan Elagami, Jan‐Pascal Boos, Jan‐Pascal Boos, Hassan Elagami, Sven Frei Sven Frei Sven Frei Sven Frei Sven Frei Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Hassan Elagami, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Hassan Elagami, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Hassan Elagami, Jan‐Pascal Boos, Hassan Elagami, Sven Frei Sven Frei Hassan Elagami, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Sven Frei Sven Frei Sven Frei Sven Frei Sven Frei Sven Frei Sven Frei Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Sven Frei Benjamin Gilfedder, Sven Frei Benjamin Gilfedder, Gabriele Trommer, Gabriele Trommer, Benjamin Gilfedder, Benjamin Gilfedder, Benjamin Gilfedder, Sven Frei Sven Frei Benjamin Gilfedder, Benjamin Gilfedder, Sven Frei Benjamin Gilfedder, Benjamin Gilfedder, Gabriele Trommer, Sven Frei Sven Frei Sven Frei Sven Frei Sven Frei Sven Frei Benjamin Gilfedder, Sven Frei Benjamin Gilfedder, Sven Frei Benjamin Gilfedder, Benjamin Gilfedder, Sven Frei Benjamin Gilfedder, Benjamin Gilfedder, Sven Frei Sven Frei Sven Frei Benjamin Gilfedder, Benjamin Gilfedder, Sven Frei Sven Frei Jan‐Pascal Boos, Benjamin Gilfedder, Jan‐Pascal Boos, Jan‐Pascal Boos, Jan‐Pascal Boos, Sven Frei Sven Frei Sven Frei Sven Frei

Summary

Researchers combined in-lake mesocosm experiments with 1D random walk modeling to quantify microplastic residence times across three size fractions (1-5, 28-48, and 53-63 micrometers) in a 12 m deep lake, measuring residence times of 1-24 days during summer stratification and autumn turnover periods over one year.

Microplastic residence time in lakes is governed by complex and interrelated processes. In this work, we have used a series of in-lake mesocosm experiments combined with random walk modeling to understand microplastic residence times in the lake water column. Three size ranges of green fluorescent microplastic (1-5, 28-48, and 53-63 µm) were added to a 12m deep mesocosm and detected using fluorescence detectors. Experiments were conducted over one year capturing thermal stratification in summer as well as lake turnover in autumn. The measured residence times in summer ranged between ~1 and 24 days and depended mainly on particle size. The modeled residence time for the smallest particles (>200d) was considerably longer than the measured residence times in the mesocosm (~24d). This could be due to interactions between the small microplastic particles and existing particles in the lake. In contrast, during lake turnover large Rayleigh numbers showed that instabilities in the water column likely led to turbulent convective mixing and rapid sinking within the mesocosm.

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