Fate and removal of microplastics in unplanted lab-scale vertical flow constructed wetlands

Wang, Qintong; Hernández-Crespo, Carmen; Du, Benben; Hulle, Stijn Van; Rousseau, Diederik

doi:10.1016/j.scitotenv.2021.146152

Cited by 62 publications

(6 citation statements)

References 46 publications

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“…However, further research on this approach is required before it can be applied at larger scales. A difference of 4% was observed for removal efficiency of microplastics due to differences in substrates used in VFCW (Wang, Hernández‐Crespo, et al, 2021). This difference signifies the importance of substrate to microplastic‐removal efficiency.…”

Section: Discussionmentioning

confidence: 99%

“…There is a paucity of data and few articles examining VFCW-mediated remediation of microplastics. Moreover, VFCWs demonstrated efficient (>96%) removal of microplastics at the laboratory scale (Wang, Hern andez-Crespo, et al, 2021). However, further research on this approach is required before it can be applied at larger scales.…”

Section: Future Prospectsmentioning

confidence: 99%

“…Vertical flow constructed wetlands (VFCWs) have reported removal efficiencies for microplastics of up to 100% using sand as a substrate; in these cases, the density of the microplastics was an important determinant governing remediation effectiveness (Q. Wang, Hernández‐Crespo, et al, 2021). Gravel‐filled VFCWs removed microplastics at an efficiency of 96% according to the same study.…”

Section: Strategies For Remediation Of Microplasticsmentioning

confidence: 99%

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Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

Tirkey

Pandey

Tiwari

et al. 2022

Water Environment Research

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This review describes the occurrence and distribution of microplastics in freshwater and marine environments in recent years (2017–2022). Use of microplastics often results in contamination of aquatic environments, threatens biodiversity, and creates the need for environmental remediation. Such remediation strategies can involve primary, secondary, and tertiary treatments. Tertiary treatment is a frequent research subject due to its high efficiency and the possibility for advancements and enhancements. This study discusses tertiary treatments with remediation efficiencies of 95% and greater and their advantages, disadvantages, and future perspectives. Biochar‐mediated remediation of microplastics is an effective method that may be able to achieve efficiencies approaching 100%. The study concludes by exploring methods of removing microplastics, including constructed wetlands and biochar, which offer high efficiency. Practitioner Points Tertiary treatments are an effective microplastic remediation strategy applicable succeeding secondary or primary treatments or as an individual remediation strategy. Biochar is a highly efficient adsorbent for microplastic remediation from aquatic environment with eco‐friendly aspect and reusability. Modifications in tertiary treatments and enhancement in remediation efficiency are still a subject of research for future studies.

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Section: Discussionmentioning

confidence: 99%

Section: Future Prospectsmentioning

confidence: 99%

Section: Strategies For Remediation Of Microplasticsmentioning

confidence: 99%

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Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

Tirkey

Pandey

Tiwari

et al. 2022

Water Environment Research

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“…In the treatment of rural domestic sewage, it was found that the smaller the particle size of the matrix, the higher the removal efficiency of microplastics, which may be caused by the greater friction of the microplastics per unit volume of sediment. Researchers reported that microplastics' removal and retention efficiency in the sand-based reactor was close to 100%, which was significantly higher than that of the gravel-based reactor [174]. The biofilm formed on the sedimentary matrix of the water body affects the migration of microplastics, and it was observed that the biofilm growing on the water matrix reduces the pore space and increases the viscosity of the matrix, thereby enhancing the substrate's ability to retain microplastics [175].…”

Section: Sedimentsmentioning

confidence: 99%

Natural Factors of Microplastics Distribution and Migration in Water: A Review

An,

Wang,

Adnan

et al. 2024

Water

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Microplastics are widely present worldwide and are of great concern to scientists and governments due to their toxicity and ability to serve as carriers of other environmental pollutants. The abundance of microplastics in different water bodies varied significantly, mainly attributed to the initial emission concentration of pollutants and the migration ability of pollutants. The migration process of microplastics determines the abundance, fate, and bioavailability of microplastics in water. Previous studies have proved that the physicochemical properties of water bodies and the properties of microplastics themselves are important factors affecting their migration, but the change in external environmental conditions is also one of the main factors controlling the migration of microplastics. In this paper, we focus on the effects of meteorological factors (rainfall, light, and wind) on the distribution and migration of microplastics and conclude that the influence of meteorological factors on microplastics mainly affects the inflow abundance of microplastics, the physical and chemical properties of water, and the dynamics of water. At the same time, we briefly summarized the effects of aquatic organisms, water substrates, and water topography on microplastics. It is believed that aquatic organisms can affect the physical and chemical properties of microplastics through the physical adsorption and in vivo transmission of aquatic plants, through the feeding behavior, swimming, and metabolism of animals, and through the extracellular polymers formed by microorganisms, and can change their original environmental processes in water bodies. A full understanding of the influence and mechanism of external environmental factors on the migration of microplastics is of great theoretical significance for understanding the migration law of microplastics in water and comprehensively assessing the pollution load and safety risk of microplastics in water.

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“…Natural wetland systems were capable of removing 50% of surface water MPs [ 116 ]. As a nature-based wastewater treatment system, vertical-flow constructed wetlands (VFCWs) had the function of removing MPs with porous media, where MPs were distributed throughout the full height of gravel-filled VFCWs, and earthworms could transport MPs to the bottom of VFCWs and ingest them [ 117 ].…”

Section: Enrichment and Removal Technologies Of Microplastics In Aqua...mentioning

confidence: 99%

Removing microplastics from aquatic environments: A critical review

Pan

Gao

et al. 2023

Environmental Science and Ecotechnology

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Fate and removal of microplastics in unplanted lab-scale vertical flow constructed wetlands

Cited by 62 publications

References 46 publications

Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

Global distribution of microplastic contaminants in aquatic environments and their remediation strategies

Natural Factors of Microplastics Distribution and Migration in Water: A Review

Removing microplastics from aquatic environments: A critical review

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