Sample preparation methods for the analysis of microplastics in freshwater ecosystems: a review

Razeghi, Nastaran; Hamidian, Amir Hossein; Mirzajani, Alireza; Abbasi, Sajjad; Wu, Chenxi; Yang, Min

doi:10.1007/s10311-021-01341-5

Cited by 37 publications

(16 citation statements)

References 174 publications

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“…In fact, most natural particles are denser than plastic, ranging between 1.7 and 3.0 g/cm 3 . Compared to those trapped in the water phase, MPs trapped in sediment are more difficult to separate . The cleanup of stranded MPs in sediment involves the application of floating pool skimmers with fine mesh screens .…”

Section: Resultsmentioning

confidence: 99%

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Transport of Microplastics in Shore Substrates over Tidal Cycles: Roles of Polymer Characteristics and Environmental Factors

Feng

Chen

Greer

et al. 2022

Environ. Sci. Technol.

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Tidal zones providing habitats are particularly vulnerable to microplastic (MP) pollution. In this study, the effects of tidal cycles on the transport of MPs (4–6 μm polyethylene, PE1; 125 μm polyethylene, PE2; and 5–6 μm polytetrafluoroethylene, PFTE) in porous media combined with various environmental and MPs properties were systemically investigated. The results indicated that smaller substrate sizes exhibited higher retention percentages compared to those of larger substrate sizes under different tidal cycles. In terms of the size of MPs, a larger size (same density) was found to result in enhanced retention of MPs in the column. As the number of tidal cycles increased, although the transport of MPs from the substrate to the water phase was enhanced, PE1 was washed out more with the change in water level, compared to PTFE. Additionally, more MPs were retained in the column with the increase of salinity and the decrease of flow velocity under the same tidal cycles. Ultraviolet and seawater aged PE1 showed enhanced transport, while aged PTFE showed enhanced retention under the same tidal cycles. These results can help understand the MP behaviors in the shoreline environment and provide support for future cleanup and sampling in tidal zones.

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Section: Resultsmentioning

confidence: 99%

“…Compared to those trapped in the water phase, MPs trapped in sediment are more difficult to separate. 62 The cleanup of stranded MPs in sediment involves the application of floating pool skimmers with fine mesh screens. 63 Even then, it is difficult to distinguish based on the density between dense MPs and natural sediment.…”

Section: Effects Of Substratementioning

confidence: 99%

Transport of Microplastics in Shore Substrates over Tidal Cycles: Roles of Polymer Characteristics and Environmental Factors

Feng

Chen

Greer

et al. 2022

Environ. Sci. Technol.

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“…It is worth noting that the analysis results of microplastics are easily affected by the sampling methods of microplastics (Razeghi et al 2021a). Therefore, the sampling of microplastics is an important basis for the analysis of microplastics.…”

Section: Sampling Of Microplasticsmentioning

confidence: 99%

“…In the density separation method, sodium chloride is the most prevalent salt used in extracting microplastics from freshwater. In the digestion method, hydrogen peroxide and Fenton's reagent are most frequently used in digestion of organic materials (Razeghi et al 2021a).…”

Section: Sampling Of Microplasticsmentioning

confidence: 99%

Analytical methods for microplastics in the environment: a review

2022

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Microplastic pollution is a recently discovered threat to ecosystems requiring the development of new analytical methods. Here, we review classical and advanced methods for microplastic analysis. Methods include visual analysis, laser diffraction particle, dynamic light scattering, scanning electron microscopy, Fourier-transform infrared spectroscopy, Raman spectroscopy, thermal analysis, mass spectrometry, aptamer and in vitro selection, and flow cytometry.

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“…Microplastic separating procedure is also the important stage for next microplastic removal (Razeghi et al 2022). Nowadays, scientists have confirmed sorption and filtration methodologies can treat microplastic-containing wastewater with good efficiencies.…”

Section: Remediationmentioning

confidence: 99%

Impact of waste of COVID-19 protective equipment on the environment, animals and human health: a review

et al. 2022

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During the Corona Virus Disease 2019 (COVID-19) pandemic, protective equipment, such as masks, gloves and shields, has become mandatory to prevent person-to-person transmission of coronavirus. However, the excessive use and abandoned protective equipment is aggravating the world's growing plastic problem. Moreover, above protective equipment can eventually break down into microplastics and enter the environment. Here we review the threat of protective equipment associated plastic and microplastic wastes to environments, animals and human health, and reveal the protective equipment associated microplastic cycle. The major points are the following:1) COVID-19 protective equipment is the emerging source of plastic and microplastic wastes in the environment. 2) protective equipment associated plastic and microplastic wastes are polluting aquatic, terrestrial, and atmospheric environments. 3) Discarded protective equipment can harm animals by entrapment, entanglement and ingestion, and derived microplastics can also cause adverse implications on animals and human health. 4) We also provide several recommendations and future research priority for the sustainable environment. Therefore, much importance should be attached to potential protective equipment associated plastic and microplastic pollution to protect the environment, animals and humans.

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Sample preparation methods for the analysis of microplastics in freshwater ecosystems: a review

Cited by 37 publications

References 174 publications

Transport of Microplastics in Shore Substrates over Tidal Cycles: Roles of Polymer Characteristics and Environmental Factors

Transport of Microplastics in Shore Substrates over Tidal Cycles: Roles of Polymer Characteristics and Environmental Factors

Analytical methods for microplastics in the environment: a review

Impact of waste of COVID-19 protective equipment on the environment, animals and human health: a review

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