Microplastics profile in constructed wetlands: Distribution, retention and implications

Lu, Hsuan-Cheng; Ziajahromi, Shima; Locke, Ashley J.; Neale, Peta A.; Leusch, Frederic

doi:10.1016/j.envpol.2022.120079

Cited by 34 publications

(4 citation statements)

References 63 publications

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“…However, this makes it difficult to compare our results with those from studies that have used pyrolysis GC–MS alone, as they are expressed in a different unit. However, our result about other dominant MPs (PP and PE) is consistent with previous studies reporting MPs in the stormwater sediment. , …”

Section: Resultsmentioning

confidence: 99%

“…The collected stormwater samples from each sampling point (inlet, outlet) were filtered through 25 μm stainless-steel filters and processed according to a previously validated methodology. , Briefly, this includes digestion using 30% hydrogen peroxide (H 2 O 2 ), density separation using sodium iodide (NaI, 1.8 g/cm 3 ), filtration, staining using a Rose-Bengal solution, and drying at 40 °C. The details of the sediment and water sample processing procedures are provided in Supporting Information Section S1.…”

Section: Methodsmentioning

confidence: 99%

“…Sediment sample processing was performed as previously described. , In brief, this includes drying and homogenizing of the samples, wet peroxide oxidation (WPO) using hydrogen peroxide (H 2 O 2 30%) in conjunction with a ferrous sulfate (FeSO 4 ) solution, and a two-step density separation using MiliQ water to separate low-density material and sodium iodide (NaI, 1.8 g/cm 3 ) to separate a range of higher density plastics and filtration over 25 μm stainless-steel filters.…”

Section: Methodsmentioning

confidence: 99%

“…However, our result about other dominant MPs (PP and PE) is consistent with previous studies reporting MPs in the stormwater sediment. 9,24 This study has quantified and identified various MPs in urban stormwater and sediment of stormwater drainage systems from different sites in Queensland, Australia. The most common MPs found across all samples (water and sediment) were TWPs, mainly butadiene rubber, from vehicle tires.…”

Section: Stormwater and Efficacy Of The Litter Capturementioning

confidence: 99%

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Microplastics and Tire Wear Particles in Urban Stormwater: Abundance, Characteristics, and Potential Mitigation Strategies

Ziajahromi

Drapper³

et al. 2023

Environ. Sci. Technol.

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Stormwater has been identified as a pathway for microplastics (MPs), including tire wear particles (TWPs), into aquatic habitats. Our knowledge of the abundance of MPs in urban stormwater and potential strategies to control MPs in stormwater is still limited. In this study, stormwater samples were collected from microlitter capture devices (inlet and outlet) during rain events. Sediment samples were collected from the material captured in the device and from the inlet and outlet of a constructed stormwater wetland. MP (>25 μm) concentration in stormwater varied across different locations ranging from 3.8 to 59 MPs/L in raw and 1.8 to 32 MPs/L in treated stormwater, demonstrating a decrease after passage through the device (35–88% removal). TWPs comprised ∼95% of all particles, followed by polypropylene (PP) and poly(ethylene terephthalate) (PET). The concentration of TWPs ranged from 2.5 to 58 TWPs/L and 1450 to 4740 TWPs/kg in stormwater and sediment, respectively. A higher abundance of MPs was found in the sediment at the inlet of the constructed wetland compared to the outlet, indicating a potential role of wetlands in removing MPs from stormwater. These findings suggest that both constructed wetlands and microlitter capture devices can mitigate the transport of MPs from stormwater to the receiving waterways.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%