Treatment processes for microplastics and nanoplastics in waters: State-of-the-art review

Estahbanati, M.R. Karimi; Kiendrebeogo, Marthe; Mostafazadeh, Ali Khosravanipour; Drogui, Patrick; Tyagi, Rajeshwar Dayal

doi:10.1016/j.marpolbul.2021.112374

Cited by 55 publications

(24 citation statements)

References 141 publications

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“…As, large MP particles can be further removed during the secondary treatment, they concentration in the secondary effluent is lower. Studies showed that MPs with size >300 mm only account for 8% after secondary treatment (Talvitie et al, 2016, Mintenig et al, 2017 However, several studies on this subject conclude that a tertiary treatment step is necessary for effective MPs removal from wastewater (Estahbanati et al, 2021).…”

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confidence: 99%

“…MPs and NPs have been detected in freshwaters around the world (Eriksen et al, 2013 andWang et al, 2018), including polar regions (Mishra et al, 2021). However, as mentioned by Estahbanati et al (2021) in their review, interest of the scientific community in technologies for reducing and/or removing MPs and NPs in water is very recent. Especially, the first studies for NPs removal have been published less than 5 years ago, and publications on MPs and NPs removal increased twice between 2019 and 2020 (Estahbanati et al, 2021).…”

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confidence: 99%

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Challenges and opportunities for microplastic and nanoplastic removal from industrial wastewater

Robert

Allé

Keller

et al. 2023

Current Developments in Biotechnology and Bioengineering

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confidence: 99%

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confidence: 99%

Challenges and opportunities for microplastic and nanoplastic removal from industrial wastewater

Robert

Allé

Keller

et al. 2023

Current Developments in Biotechnology and Bioengineering

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“…Although there are several methods employed for the removal of NMPs from water [ 7 ], at least some of these methods are limited by minimum particle size and destructive methods are not useful for laboratory particle analysis. While purification and isolation methods (filtration, evaporation, solvent extraction, density separation, or gravitational separation) exist, due to the unique properties of nanoplastics, each of these methods has shortfalls.…”

Section: Introductionmentioning

confidence: 99%

Testing an Iron Oxide Nanoparticle-Based Method for Magnetic Separation of Nanoplastics and Microplastics from Water

et al. 2022

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Nanoplastic pollution is increasing worldwide and poses a threat to humans, animals, and ecological systems. High-throughput, reliable methods for the isolation and separation of NMPs from drinking water, wastewater, or environmental bodies of water are of interest. We investigated iron oxide nanoparticles (IONPs) with hydrophobic coatings to magnetize plastic particulate waste for removal. We produced and tested IONPs synthesized using air-free conditions and in atmospheric air, coated with several polydimethylsiloxane (PDMS)-based hydrophobic coatings. Particles were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), superconducting quantum interference device (SQUID) magnetometry, dynamic light scattering (DLS), X-ray diffraction (XRD) and zeta potential. The IONPs synthesized in air contained a higher percentage of the magnetic spinel phase and stronger magnetization. Binding and recovery of NMPs from both salt and freshwater samples was demonstrated. Specifically, we were able to remove 100% of particles in a range of sizes, from 2–5 mm, and nearly 90% of nanoplastic particles with a size range from 100 nm to 1000 nm using a simple 2-inch permanent NdFeB magnet. Magnetization of NMPs using IONPs is a viable method for separation from water samples for quantification, characterization, and purification and remediation of water.

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“… 9 − 12 The methodologies used to remove MP can be classified into two main groups: the more traditional methods, such as coagulation and filtration, 13 − 15 and emerging ones that remove MP with extremely high efficiencies. 16 − 18 Some noteworthy methods are photocatalytic micromotors such as BiVO 4 /Fe 3 O 4 19 and Au@Ni@TiO 2 , 20 surface-functionalized microbubbles, 21 froth flotation, 22 and surface functionalization of the MP with hypochlorite (ClO – ) 23 or magnetite (Fe 3 O 4 ). 24 …”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic 304 Stainless Steel Mesh for the Removal of High-Density Polyethylene Microplastics

et al. 2022

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Microplastics are a global issue that affects the environment, economy, as well as human health. Herein, we present a superhydrophobic 304 stainless steel mesh obtained by chemical etching followed by a liquid-phase deposition of lauric acid that can be used for microplastic removal. Field emission scanning electron microscopy (FE-SEM) and high-resolution X-ray photoelectron spectroscopy (HR-XPS), among other techniques, were used to identify the hierarchical structure and chemical composition of the surface. They revealed that iron laurate decreased the surface free energy. The 304 stainless steel mesh was superhydrophobic (169°) and superoleophilic (0°). Taking advantage of these wetting properties, we showed an innovative use of these superhydrophobic surfaces in the removal of microplastics. Additionally, we analyzed the removal efficiency from a surface and colloidal point of view that allowed us to explain and clarify why microplastics can also be removed by their wetting properties. The loss of a double electrostatic cloud between the microplastics and the predominance of van der Waals interactions in the organic phase promote the removal of these persistent pollutants from water.

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Treatment processes for microplastics and nanoplastics in waters: State-of-the-art review

Cited by 55 publications

References 141 publications

Challenges and opportunities for microplastic and nanoplastic removal from industrial wastewater

Challenges and opportunities for microplastic and nanoplastic removal from industrial wastewater

Testing an Iron Oxide Nanoparticle-Based Method for Magnetic Separation of Nanoplastics and Microplastics from Water

Superhydrophobic 304 Stainless Steel Mesh for the Removal of High-Density Polyethylene Microplastics

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