Sediment trapping – An attempt to monitor temporal variation of microplastic flux rates in aquatic systems

Saarni, Saija; Hartikainen, Samuel; Meronen, Senja; Uurasjärvi, Emilia; Kalliokoski, Maarit; Koistinen, Arto

doi:10.1016/j.envpol.2021.116568

Cited by 29 publications

(6 citation statements)

References 56 publications

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“…The macroplastics can either be buried by natural sediments, which increases their remobilization threshold, be transported as bed-load transport, or get resuspended into the water column due to stronger flow velocities or turbulence (van Emmerik and Schwarz, 2020). Possible methods to measure deposited macroplastics include the analysis of dredged sediment (Constant et al, 2021), or analyzing samples from sediment traps (Enders et al, 2019;Saarni et al, 2021). There are only a few measurement methods to quantify macroplastics in riverbed sediments or as bed-load, yet, those are essential to identify macroplastic retention zones and understand their spatiotemporal distribution.…”

Section: Retained In Riverbed Sedimentsmentioning

confidence: 99%

Rivers as Plastic Reservoirs

et al. 2022

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Land-based plastic waste, carried to the sea through rivers, is considered a main source of marine plastic pollution. However, most plastics that leak into the environment never make it into the ocean. Only a small fraction of plastics that are found in the terrestrial and aquatic compartments of river systems are emitted, and the vast majority can be retained for years, decades, and potentially centuries. In this perspective paper we introduce the concept of river systems as plastic reservoirs. Under normal conditions, hydrometeorological variables (such as wind, runoff and river discharge) mobilize, transport and deposit plastics within different river compartments (e.g., riverbanks, floodplains, lakes, estuaries). The emptying of these plastic reservoirs primarily occurs under extreme hydrological conditions (e.g., storms, floods). In this paper we specifically focus on the retention mechanisms within different river compartments, and their effect on the fate of the plastics that are accumulated on various timescales. We aim to introduce the concept of rivers as (long-term) sinks for plastic pollution, and provide suggestions for future research directions.

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Section: Retained In Riverbed Sedimentsmentioning

confidence: 99%

Rivers as Plastic Reservoirs

et al. 2022

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“…Recently, most research on MPs has focused on different aquatic environments such as rivers, groundwater, lakes, and seawater (Bharath et al, 2021;Clayer et al, 2021;Kooi et al, 2021;Woodward et al, 2021), and sedimentary environments such as island sediments, terrestrial, river, and marine sediments (Braun et al, 2021;Saarni et al,2021;Vermeiren et al, 2021;Yan et al, 2021;Zhou et al, 2021). In addition, there are also studies on long-distance MPs transport.…”

Section: Introductionmentioning

confidence: 99%

Microplastic atmospheric dustfall pollution in urban environment: Evidence from the types, distribution, and probable sources in Beijing, China

Shao

Jones

et al. 2022

Science of The Total Environment

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“…We know from microplastic literature that density separation using heavy liquids can be used to remove sand and other sediment material from samples. 45 Because of the colloidal nature of nanoplastics, density separation methods are more challenging to apply, but possible if centrifugation is used. 46 Another way to remedy the issue would be to collect samples from deeper waters further away from the shore where there is less sand mixed with the water.…”

Section: Demonstration With Seawater-nanoplastic Mixturementioning

confidence: 99%

Expanding sample volume for microscopical detection of nanoplastics

Hiltunen,

Huopalainen,

Mäkilä

et al. 2024

Preprint

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The extent of nanoplastic pollution has raised severe environmental and health concerns. While the means for microplastic detection are abundant, improved tools for nanoplastic detection are called-for. State- of-the-art microscopic techniques can detect nanoplastics down to tens of nanometers, however, only from very small sample sizes (typically ∼10 µl). In this work, we describe a method that enables sampling of 1 liter of seawater by the means of correlative Raman- and SEM-techniques. This is achieved by adapting common microplastic sample purification protocols (i.e. chemical digestion) to suit the nanoplastic study. In addition, we decorate a membrane filter with SERS-property to amplify the Raman signals. Together, the purification method combined with the use of the SERS-activated-membrane-filter enables identification and imaging of individual nanoplastic particles from significantly larger sample sizes than before. In the nanoscale the average recovery rate is 5 %. These results aim to provide useful tools for researchers in the fight against plastic pollution.

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Sediment trapping – An attempt to monitor temporal variation of microplastic flux rates in aquatic systems

Cited by 29 publications

References 56 publications

Rivers as Plastic Reservoirs

Rivers as Plastic Reservoirs

Microplastic atmospheric dustfall pollution in urban environment: Evidence from the types, distribution, and probable sources in Beijing, China

Expanding sample volume for microscopical detection of nanoplastics

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