首页|Rainfall-induced microplastic fate and transport in unsaturated Dutch soils

Rainfall-induced microplastic fate and transport in unsaturated Dutch soils

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  • NETL
  • NSTL
  • Elsevier
© 2024 The AuthorsMicroplastic pollution has become a growing concern in terrestrial ecosystems， with significant implications for environmental and human health。 Understanding the fate and transport of microplastics in soil environment is crucial for effective mitigation strategies。 This study investigates the dynamics of microplastic (Low-density polyethylene (LDPE)， polybutylene adipate terephthalate (PBAT)， and starch-based biodegradable plastic) transport in unsaturated soils under varying rainfall intensities and soil types， aiming to elucidate the factors influencing their behavior。 Effluent samples were analyzed to measure microplastic transport， with microplastic balance analysis ensuring experimental accuracy。 The setup replicated real-world flow conditions， providing insights into microplastic transport in unsaturated porous media。 Microplastic balance analysis revealed high recovery factors (between 64 % and 104 %)， indicating the reliability of the experimental approach。 Microplastic transport varied significantly between sandy loam and loamy sand soils， with loamy sand soils exhibiting higher wash-off rates due to their unique properties。 LDPE microplastics showed a higher tendency to detach from soil columns compared to PBAT and starch-based particles。 Higher rainfall intensity in loamy sand soil columns resulted in an increased washout of LDPE， PBAT， and starch-based particles by 92 %， 144 %， and 85 %， respectively， compared to low rainfall intensity。 In sandy loam soil， increased rainfall intensity resulted in a significantly higher washout of LDPE， PBAT， and starch-based particles with percentages of 93 %， 69 %， and 45 %， respectively。 This underscores the important role of water flow in mobilizing microplastics within the soil matrix。

MicroplasticSoil columnTransportUnsaturated condition

Soltani Tehrani R.、Yang X.、van Dam J.

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Department of Soil Physics and Land Management Wageningen University and Research

2025

10.1016/j.jconhyd.2024.104456

Journal of contaminant hydrology

Journal of contaminant hydrology

SCI
ISSN：0169-7722
年,卷(期)：2025.268(Jan.)
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