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Investigate microplatics removal using a stormwater bioretention device and develop an image analysis approach to quantify microplastics
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Researchers evaluated whether a stormwater bioretention device — a filter system that captures runoff — can remove microplastics from urban stormwater, and developed an image analysis method to count and measure those particles. The full results are restricted to university members, but the work addresses a key gap in understanding how green infrastructure can intercept microplastic pollution before it reaches waterways.
Full Text is available to authenticated members of The University of Auckland only.
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Microplastics: The Occurrence in Stormwater Runoff and the Effectiveness of Bioretention Systems for Removal
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Researchers measured microplastic concentrations in stormwater runoff and tested the removal efficiency of bioretention systems including green roofs, bioswales, and bioretention cells, finding that these green infrastructure systems can significantly reduce microplastic loads before they reach surface waters. The study provides baseline data on stormwater as a microplastic transport pathway and evaluates a nature-based treatment solution.
The Occurrence and Removal of Microplastics from Stormwater Using Green Infrastructure
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This review examines microplastic occurrence in urban stormwater and the potential of green infrastructure — particularly bioretention systems and constructed wetlands — to capture and remove plastic particles before they reach surface water bodies.
Analysis of Bioretention Capability in Removing Microplastic Particles from Stormwater
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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.
Microplastics removal from stormwater runoff by bioretention cells: A review
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This review examines the potential of bioretention cells, a type of green infrastructure, to remove microplastics from stormwater runoff. Researchers analyzed how these systems filter microplastics through soil media and vegetation and identified the key design parameters that affect removal efficiency. The study suggests that bioretention cells offer a promising nature-based solution for reducing microplastic loads entering waterways from urban areas.
Small-Size Microplastics in Urban Stormwater Runoff are Efficiently Trapped in a Bioretention Cell
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Researchers conducted a two-year field study showing that bioretention cells, a type of green stormwater infrastructure, effectively captured microplastics as small as 25 micrometers from urban runoff. The system retained over 80 percent of small microplastics, with fibers and fragments being the most commonly trapped types. The findings suggest that existing urban green infrastructure can serve double duty as a practical tool for reducing microplastic pollution in waterways.
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