Inter-storm variation in microplastic concentration and polymer type at stormwater outfalls and a bioretention basin

Boni, William; Arbuckle-Keil, Georgia; Fahrenfeld, Nicole

doi:10.1016/j.scitotenv.2021.151104

Cited by 33 publications

(17 citation statements)

References 24 publications

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“…Other studies, however, have not found relationships between concentrations and rainfall or antecedent dry days (Werbowski et al, 2021;Boni et al, 2022), suggesting that additional factors may contribute the concentrations observed in stormwater. Microplastics and anthropogenic particles are subject to transport processes within the sewer pipes, such as deposition and resuspension, and particles that settle into storm sewer sediment will remain there until water velocities are sufficiently high to remobilize them (Hurley et al, 2018;Ockelford et al, 2020;Sang et al, 2021).…”

Section: Microplastics In Baseflow Vs Rain Eventsmentioning

confidence: 87%

“…Emissions estimates have been made based on direct measurement of microplastics in runoff combined with different modeled scenarios to produce annual and city-wide emissions estimates (Sutton et al, 2019;Piñon-Colin et al, 2020;Chen et al, 2022). However, concentrations and characteristics of microplastics in stormwater vary between storms and within individual storm events (Treilles et al, 2021;Boni et al, 2022;Sun et al, 2023), which may be reflected in the temporal variability of microplastics observed in urban surface water (Hitchcock 2020;Wei et al, 2022). To better understand the influence of stormwater on changes in concentrations of microplastics in surface waters, an improved understanding of microplastic discharge during individual rain events is needed.…”

Section: Introductionmentioning

confidence: 99%

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Estimated discharge of microplastics via urban stormwater during individual rain events

Ross

Loutan²,

Groeneveld³

et al. 2023

Front. Environ. Sci.

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Urban stormwater runoff is an important pathway for the introduction of microplastics and other anthropogenic pollutants into aquatic environments. Highly variable concentrations of microplastics have been reported globally in runoff, but knowledge of key factors within urban environments contributing to this variability remains limited. Furthermore, few studies to date have quantitatively assessed the release of microplastics to receiving waters via runoff. The objectives of this study were to assess the influence of different catchment characteristics on the type and amount of microplastics in runoff and to provide an estimate of the quantity of microplastics discharged during rain events. Stormwater samples were collected during both dry periods (baseflow) and rain events from 15 locations throughout the city of Calgary, Canada’s fourth largest city. These catchments ranged in size and contained different types of predominant land use. Microplastics were found in all samples, with total concentrations ranging from 0.7 to 200.4 pcs/L (mean = 31.9 pcs/L). Fibers were the most prevalent morphology identified (47.7 ± 33.0%), and the greatest percentage of microplastics were found in the 125–250 µm size range (26.6 ± 22.9%) followed by the 37–125 µm size range (24.0 ± 22.3%). Particles were predominantly black (33.5 ± 33.8%), transparent (22.6 ± 31.3%), or blue (16.0 ± 21.6%). Total concentrations, dominant morphologies, and size distributions of microplastics differed between rain events and baseflow, with smaller particles and higher concentrations being found during rain events. Concentrations did not differ significantly amongst catchments with different land use types, but concentrations were positively correlated with maximum runoff flow rate, catchment size, and the percentage of impervious surface area within a catchment. Combining microplastic concentrations with hydrograph data collected during rain events, we estimated that individual outfalls discharged between 1.9 million to 9.6 billion microplastics to receiving waters per rain event. These results provide further evidence that urban stormwater runoff is a significant pathway for the introduction of microplastics into aquatic environments and suggests that mitigation strategies for microplastic pollution should focus on larger urbanized catchments.

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Section: Microplastics In Baseflow Vs Rain Eventsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Estimated discharge of microplastics via urban stormwater during individual rain events

Ross

Loutan²,

Groeneveld³

et al. 2023

Front. Environ. Sci.

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“…There is still a need to develop and improve a novel analytical method for detecting MNP particles in environmental samples within a short time [ 51 , 53 , 56 , 57 , 67 , 121 , 159 ]. Figure 7 C displays a novel micro‑optofluidic platform used for fast detection of MNP particles by means of Raman spectra.…”

Section: Mnp Detection By Raman Spectroscopymentioning

confidence: 99%

“…Recently, there has been a large number of scientific reviews promising to elucidate not only the effects of MNP pollution on risks to human health [ 49 ] and the environment [ 50 ], but also many methodologies for the trace detection of MNPs in aquatic [ 51 , 52 ], sedimentary [ 53 , 54 ], freshwater, and coastal ecosystems [ 55 ], as well as other environments [ 56 , 57 ], in wastewater [ 58 ], and on beaches [ 59 ]. Furthermore, several researchers have investigated a variety of analytical technologies for the trace detection of MNPs, including fluorescence microscopy [ 18 , 60 – 62 ], impedance spectroscopy [ 63 ], microwave-based techniques [ 64 ], hyperspectral imaging [ 65 , 66 ], Fourier transform infrared spectroscopy (FTIR) [ 67 , 68 ], near-infrared (NIR) hyperspectral imaging and chemometrics [ 69 ], semi-automated analysis [ 70 ], a thermo analytical method [ 71 ], and mass- or particle-based analysis [ 72 ]. However, these thermal analysis methodologies often require additional procedures to separate analytes in the sample preparation, leading to time-consuming and toxic organic solvents, as well as further adverse effects on the environment.…”

Section: Introductionmentioning

confidence: 99%

Advanced microplastic monitoring using Raman spectroscopy with a combination of nanostructure-based substrates

Kim

Lee

et al. 2022

J Nanostruct Chem

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Micro(nano)plastic (MNP) pollutants have not only impacted human health directly, but are also associated with numerous chemical contaminants that increase toxicity in the natural environment. Most recent research about increasing plastic pollutants in natural environments have focused on the toxic effects of MNPs in water, the atmosphere, and soil. The methodologies of MNP identification have been extensively developed for actual applications, but they still require further study, including on-site detection. This review article provides a comprehensive update on the facile detection of MNPs by Raman spectroscopy, which aims at early diagnosis of potential risks and human health impacts. In particular, Raman imaging and nanostructure-enhanced Raman scattering have emerged as effective analytical technologies for identifying MNPs in an environment. Here, the authors give an update on the latest advances in plasmonic nanostructured materials-assisted SERS substrates utilized for the detection of MNP particles present in environmental samples. Moreover, this work describes different plasmonic materials—including pure noble metal nanostructured materials and hybrid nanomaterials—that have been used to fabricate and develop SERS platforms to obtain the identifying MNP particles at low concentrations. Plasmonic nanostructure-enhanced materials consisting of pure noble metals and hybrid nanomaterials can significantly enhance the surface-enhanced Raman scattering (SERS) spectra signals of pollutant analytes due to their localized hot spots. This concise topical review also provides updates on recent developments and trends in MNP detection by means of SERS using a variety of unique materials, along with three-dimensional (3D) SERS substrates, nanopipettes, and microfluidic chips. A novel material-assisted spectral Raman technique and its effective application are also introduced for selective monitoring and trace detection of MNPs in indoor and outdoor environments. Graphical abstract

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“…18 The present study builds upon previous work by our team that (1) showed higher MP concentration in stormwater compared to wastewater effluent and hydraulically connected surface waters 19 and (2) the influence of rainfall depth/sampling site on inter-storm variation of MP concentrations in the 250–2000 μm particle size-class. 20…”

Section: Introductionmentioning

confidence: 99%

Urban stormwater microplastic size distribution and impact of subsampling on polymer diversity

Parmar

Kumi

Arbuckle-Keil

et al. 2023

Environ. Sci.: Processes Impacts

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Inter-storm variation in microplastic concentration and polymer type at stormwater outfalls and a bioretention basin

Cited by 33 publications

References 24 publications

Estimated discharge of microplastics via urban stormwater during individual rain events

Estimated discharge of microplastics via urban stormwater during individual rain events

Advanced microplastic monitoring using Raman spectroscopy with a combination of nanostructure-based substrates

Urban stormwater microplastic size distribution and impact of subsampling on polymer diversity

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