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Analysis of Bioretention Capability in Removing Microplastic Particles from Stormwater
Summary
This study tested the ability of bioretention systems (vegetated stormwater gardens) to remove microplastic particles from stormwater, finding effective removal across multiple particle sizes and types. Bioretention infrastructure shows promise as a practical tool for preventing microplastics from stormwater runoff from reaching rivers and coastal waters.
In the field of stormwater management, multiple studies have been conducted on bioretention efficiency in removing common stormwater pollutants (e.g., oil and grease, heavy metals, and nutrients). However, its application in removing microplastics is still in preliminary stages. This study aims to fill a clear knowledge gap regarding the removal efficiency of microplastic particles in bioretention soil media. Laboratory experiments were designed to evaluate and analyze the effects of bioretention media characteristics with various stormwater parameters on microplastic removal efficiency using fluorescent microscopy to detect particles after simulated storm events.
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