Notes on Common Misconceptions in Microplastics Removal from Water

Krystyník, Pavel; Strunakova, Katarina; Šyc, Michal; Klusoň, Petr

doi:10.3390/app11135833

Cited by 9 publications

(5 citation statements)

References 121 publications

(140 reference statements)

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“…Due to their small sizes, microplastic particles can be discharged into the environment from treated wastewater effluents. The most common are polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET) [135]. Recent research has shown that semiconductor metal oxides can be applied to the photocatalytic removal of microplastics from water samples.…”

Section: Discussionmentioning

confidence: 99%

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Lissarrague

Alshehri

Alsalhi

et al. 2023

Adsorption Science & Technology

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The presence of heavy metals in wastewater, such as Ni, Pb, Cd, V, Cr, and Cu, is a serious environmental problem. This kind of inorganic pollutant is not biodegradable for several years, and its harmful effect is cumulative. Recently, semiconductor nanomaterials based on metal oxides have gained interest due to their efficiency in the removal of heavy metals from contaminated water, by inducing photocatalytic ion reduction when they absorb light of the appropriate wavelength. The most commonly applied semiconductor oxides for these purposes are titanium oxide (TiO2), zinc oxide (ZnO), and binary nanomaterials composed of both types of oxides. The main purpose of this work is to critically analyse the existent literature concerning this topic focusing specially in the most important factors affecting the adsorption or photocatalytic capacities of this type of nanomaterials. In particular, photocatalytic activity is altered by various factors, such as proportion of polymorphs, synthesis method, surface area, concentration of defects and particle size, among others. After a survey of the actual literature, it was found that, although these metal oxides have low absorption capacity for visible light, it is possible to obtain an acceptable heavy metal reduction performance by sensitization with dyes, doping with metallic or nonmetallic atoms, introduction of defects, or the coupling of two or more semiconductors.

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Section: Discussionmentioning

confidence: 99%

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Lissarrague

Alshehri

Alsalhi

et al. 2023

Adsorption Science & Technology

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“…This was attributed to specific adsorption and/or electrostatics attraction . The basic mechanisms that transpire between NMs and MPs have been reported. , Table provides a summary of these basic mechanisms.…”

Section: Interaction Mechanisms Between Mps and Nmsmentioning

confidence: 99%

“…35 The basic mechanisms that transpire between NMs and MPs have been reported. 41,25 From the studies, it is important to note that the mechanism of action that occurs between a specific NM and MP is entirely dependent on the chemistry of the MP and the surface chemistry of the NM. Since majority of the studies elucidating a mechanism of interaction have been between metal-based…”

Section: Nmsmentioning

confidence: 99%

“…This results in the formation of flocs which can then be removed via filtration or sedimentation. 41 Photocatalyst Au@Ni@TiO 2 micromotor 43 Photocatalysis contains two types of reactions: photoreduction and photooxidation. Semiconductor NMs consist of an empty conduction band and a filled valence band.…”

Section: ■ the Impact Of Water Characteristics On Nms Interaction Wit...mentioning

confidence: 99%

“…Nanofilters that contain nanosized sieves can be utilized effectively in the separation and removal of MPs and NPs from the effluent 41. …”

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confidence: 99%

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Nanomaterials for Microplastic Removal from Wastewater: Current State of the Art Nanomaterials and Future Prospects

Indhur,

Amoah,

Bux

et al. 2023

ACS EST Water

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Microplastics (MPs) and nanoplastics (NPs) infiltrate aquatic environments at an alarming rate, posing a serious threat to aquatic ecosystems and human health. Wastewater treatment plants are significant sources of MPs/NPs contamination in the aquatic environment, since they are inadequate at removing these MPs/NPs. This calls for the development and application of new technologies for MPs/NPs removal. Recent studies have demonstrated that nanomaterials (NMs) are effective in the removal of MPs from wastewater. This review examines MPs/NPs removal from wastewater using NMs. Despite a specific synthesis of NMs adapted for MP removal from water bodies not being clearly defined, the review assesses the current state of knowledge in relation to MPs/NPs removal from wastewater using NMs and the effect of water characteristics on the removal mechanism. Additionally, various insights into NM development based on specific interactions are addressed and linked to their suitability for wastewater treatment. There is currently considerable interest in chemically synthesizing NMs for the removal of MPs from wastewater. However, further developments are needed in the areas of physical and green synthesis of NMs for the removal of MPs. This review provides a baseline for future research and development of NMs for removing MPs from wastewater.

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