Filtration of microplastic spheres by biochar: removal efficiency and immobilisation mechanisms

Wang, Ziheng; Sedighi, Majid; Lea‐Langton, Amanda

doi:10.1016/j.watres.2020.116165

Cited by 286 publications

(64 citation statements)

References 52 publications

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“…On the other hand, the potential influence of surface characteristics on the interaction between MPs and surfaces could be whittled down when MPs are larger than 10 μm. Instead, the pore system effects including morphology become predominant in the removal of MPs larger than 10 μm [86]. In detail, MP particles could be stuck by the gaps On the other hand, the potential influence of surface characteristics on the interaction between MPs and surfaces could be whittled down when MPs are larger than 10 µm.…”

Section: Use Of Mmms For Microplastic Removalmentioning

confidence: 99%

“…In detail, MP particles could be stuck by the gaps On the other hand, the potential influence of surface characteristics on the interaction between MPs and surfaces could be whittled down when MPs are larger than 10 µm. Instead, the pore system effects including morphology become predominant in the removal of MPs larger than 10 µm [86]. In detail, MP particles could be stuck by the gaps smaller than the filter particles, trapped by the pores slightly larger than MP particles, or entangled by small chips as described in Figure 8B.…”

Section: Use Of Mmms For Microplastic Removalmentioning

confidence: 99%

“…Empirical evidence has also shown that MPs tend to degrade into smaller fragments (e.g., from micro-size to nano-size) [ 85 ], and trace amounts of organics or heavy metals can be released in the degradation process. The World Health Organization takes water pollution by MPs very seriously as an urgent global issue due to the likelihood of transport of toxic organic chemicals and heavy metals by MPs [ 86 , 87 ]. However, conventional sedimentation is less effective in MP removal [ 74 ].…”

Section: Perspectives and Future Outlookmentioning

confidence: 99%

“…With this point in mind, we try to provide future research directions for the application of MMMs for MP removal based on the variation in their interaction behaviors depending on the size. MPs ranging from 0.02 μm to 2 μm are very similar to colloids (0.001 μm–1 μm) in size, such that the interaction between MPs and surfaces is governed mainly by the surface characteristics rather than by the pore system effects [ 86 ]. For example, a chemically crosslinked protein sponge with many hydrophobic functional groups mainly interacted with MPs via hydrophobic interaction ( Figure 8 A).…”

Section: Perspectives and Future Outlookmentioning

confidence: 99%

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Emerging Materials to Prepare Mixed Matrix Membranes for Pollutant Removal in Water

et al. 2021

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Various pollutants of different sizes are directly (e.g., water-borne diseases) and indirectly (e.g., accumulation via trophic transfer) threatening our water health and safety. To cope with this matter, multifaceted approaches are required for advanced wastewater treatment more efficiently. Wastewater treatment using mixed matrix membranes (MMMs) could provide an excellent alternative since it could play two roles in pollutant removal by covering adsorption and size exclusion of water contaminants simultaneously. This paper provides an overview of the research progresses and trends on the emerging materials used to prepare MMMs for pollutant removal from water in the recent five years. The transition of the research trend was investigated, and the most preferred materials to prepare MMMs were weighed up based on the research trend. Various application examples where each emerging material was used have been introduced along with specific mechanisms underlying how the better performance was realized. Lastly, the perspective section addresses how to further improve the removal efficiency of pollutants in an aqueous phase, where we could find a niche to spot new materials to develop environmentally friendly MMMs, and where we could further apply MMMs.

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Section: Use Of Mmms For Microplastic Removalmentioning

confidence: 99%

Section: Use Of Mmms For Microplastic Removalmentioning

confidence: 99%

Section: Perspectives and Future Outlookmentioning

confidence: 99%

Section: Perspectives and Future Outlookmentioning

confidence: 99%

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Emerging Materials to Prepare Mixed Matrix Membranes for Pollutant Removal in Water

et al. 2021

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“…Finally, spherical MPs were the least abundant among detected MPs (13.3% and 5.3% in raw water and treated water samples, respectively). These particles originate from personal care and cosmetic products(Wang Z. et al 2020). Wang Z. et al (2020) also demonstrated that sand ltration is able to remove 60-80% of microspheres which is comparable to that of this study (60.2%).Fig.…”

mentioning

confidence: 99%

Identification of Microplastics in Conventional Drinking Water Treatment Plants in Tehran, Iran

Adib

Mafigholami

Tabeshkia

2021

Preprint

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The presence of microplastics (MPs), as an emerging pollutant is a growing concern in different water resources. These particles are recognized as less than 5 mm in size. Most of the studies have been carried out in surface waters and wastewater treatment plants (WWTPs), but there are few studies on MPs in drinking water treatment plants (DWTPs). This study investigates these particles in three different conventional DWTPs in the city of Tehran, Iran and aims to analyze these particles down to the size of 1 µm. A scanning electron microscope (SEM) was utilized in this study to quantitatively analyze MPs. Accordingly, the average abundance of MPs in raw and treated water samples varied from 1996±268 to 2808±80 MPs L-1 and 971±103 to 1401±86 MPs L-1, respectively. While particles smaller than 10 µm comprised 65-87% of MPs. Moreover, µ-Raman spectroscopy was used to characterize MPs. As the results, polypropylene (PP), polyethylene terephthalate (PET), and polyethylene (PE) were the most abundant identified polymers among MPs comprising more than 53% of particles. Additionally, MPs were categorized as fibers, fragments and spheres. This study fills the knowledge gap of MPs presence in Tehran DWTPs which is of high importance since they supply drinking water for more than 8 million people and investigates the performance of conventional DWTPs in removing MPs.

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Microplastics Removal and Degradation in Urban Water Systems

Xu¹,

Ni²

2022

Microplastics in Urban Water Management

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Filtration of microplastic spheres by biochar: removal efficiency and immobilisation mechanisms

Cited by 286 publications

References 52 publications

Emerging Materials to Prepare Mixed Matrix Membranes for Pollutant Removal in Water

Emerging Materials to Prepare Mixed Matrix Membranes for Pollutant Removal in Water

Identification of Microplastics in Conventional Drinking Water Treatment Plants in Tehran, Iran

Microplastics Removal and Degradation in Urban Water Systems

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