The difference of aggregation mechanism between microplastics and nanoplastics: Role of Brownian motion and structural layer force

Sun, Hao; Jiao, Ruyuan; Wang, Dongsheng

doi:10.1016/j.envpol.2020.115942

Cited by 71 publications

(41 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is still scarce understanding of the rules governing the combination of NP toxicity with pollutants and their mechanisms. Even if they have the same chemical composition, MPs and NPs behave differently in natural environments, with size being one of the key factors for aggregation, pollutant adsorption and toxicity [20], as the recent capacity of NPs to adsorb metals has demonstrated [21,22]. The bioaccumulation of metals in aquatic organisms, particularly fish, implies a hazard for human health because they are one of the main sources of toxic trace elements [23].…”

Section: Introductionmentioning

confidence: 99%

Functionalized Nanoplastics (NPs) Increase the Toxicity of Metals in Fish Cell Lines

González-Fernández

Baños

Esteban

2021

IJMS

View full text Add to dashboard Cite

Nanoplastics (NPs) are one of the most abundant environment-threatening nanomaterials on the market. The objective of this study was to determine in vitro if functionalized NPs are cytotoxic by themselves or increase the toxicity of metals. For that, we used 50 nm polystyrene nanoparticles with distinct surface functionalization (pristine, PS-Plain; carboxylic, PS-COOH; and amino PS-NH2) alone or combined with the metals arsenic (As) and methylmercury (MeHg), which possess an environmental risk to marine life. As test model, we chose a brain-derived cell line (SaB-1) from gilthead seabream (Sparus aurata), one of the most commercial fish species in the Mediterranean. First, only the PS-NH2 NPs were toxic to SaB-1 cells. NPs seem to be internalized into the cells but they showed little alteration in the transcription of genes related to oxidative stress (nrf2, cat, gr, gsta), cellular protection against metals (mta) or apoptosis (bcl2, bax). However, NPs, mainly PS-COOH and PS-NH2, significantly increased the toxicity of both metals. Since the coexistence of NPs and other pollutants in the aquatic environment is inevitable, our results reveal that the combined effect of NPs with the rest of pollutants deserves more attention.

show abstract

Section: Introductionmentioning

confidence: 99%

Functionalized Nanoplastics (NPs) Increase the Toxicity of Metals in Fish Cell Lines

González-Fernández

Baños

Esteban

2021

IJMS

View full text Add to dashboard Cite

show abstract

“…Although the impacts of MPs on ecosystems and human health are still under discussion, existing studies have shown that MPs can be integrated into habitats through soil transportation, affecting the predation and health of various terrestrial invertebrates 17,18 . The ubiquitous pollution of MPs to the environment, as well as its possible associated risks to the ecosystems and ultimately to human health, has recently attracted a great deal of attention from the public and the scientific community 19‐24 …”

Section: Introductionmentioning

confidence: 99%

Microplastics release from victuals packaging materials during daily usage

Guan

Yang

Zhao

et al. 2021

EcoMat

View full text Add to dashboard Cite

Plastic packaging materials are widely used because of their advantages of light weight, low cost, and convenience, especially as victuals packaging materials. Approximately 146 million metric tons of plastics were used for packaging in 2015, but most of these plastics had already been discarded and followed by serious white pollution. What's worse, the victuals packaging materials, especially polystyrene (PS) foam containers, can release microplastics (MPs) during daily usage. Through the combination of various appropriate chemical (eg, spectroscopy) and physical (eg, microscopy) characterization and analysis, the existence of MPs is proved and MPs can be intuitively observed. Although the impacts of MPs on ecosystems and human health are still under discussion, existing studies have shown that MPs can be integrated into habitats through soil transportation, affecting the health of various terrestrial invertebrates. Faced with this shocking reality, reducing the use of PS foam containers at high temperatures and developing healthy materials to substitute these plastics are promising solutions.

show abstract

“…Nanoparticle agglomerates have been shown to settle out of suspension, leading to deposition out of the water column as a result of gravitational forces (Hotze et al 2010;Besseling et al 2017). If this is the case for these polystyrene and plain PMMA agglomerates, they may settle in the sediment within estuarine zones and never reach the ocean (Sun et al 2020). However, nanoplastic agglomerates will not necessarily sink because their density could be low enough that they remain suspended in the water column or even float to the surface and form mats.…”

Section: Discussionmentioning

confidence: 99%

“…These distinct characteristics affect their fate and uptake; thus, bulk plastic behavior cannot be used as a proxy for determining nanoplastic behavior in the environment. Indeed, one study further provides evidence that nanoplastic fate and transport differ from those of microplastics (Sun et al 2020 ). In particular, the large surface area to volume ratio of nanomaterials increases the reactivity of the surface, which can increase adsorption capabilities, thus altering their toxicity when compared to a particular material's bulk counterpart (Velzeboer et al 2014 ).…”

Section: Introductionmentioning

confidence: 99%

“…Currently, little is known about the agglomeration of nanoplastics in natural systems. Some studies have demonstrated polystyrene nanoplastic agglomeration kinetics in water of both high and low ionic strength (Shams et al 2020 ; Sun et al 2020 ). However, no literature currently exists which investigates how particle composition impacts agglomeration behavior incrementally through a salinity gradient.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Nanoplastic Type and Surface Chemistry on Particle Agglomeration over a Salinity Gradient

Shupe

Boenisch

Harper

et al. 2021

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Agglomeration of nanoplastics in waters can alter their transport and fate in the environment. Agglomeration behavior of 4 nanoplastics differing in core composition (red-or blue-dyed polystyrene) and surface chemistry (plain or carboxylated poly[methyl methacrylate] [PMMA]) was investigated across a salinity gradient. No agglomeration was observed for carboxylated PMMA at any salinity, whereas the plain PMMA agglomerated at only 1 g/L. Both the red and the blue polystyrene agglomerated at 25 g/L. Results indicate that both composition and surface chemistry can impact how environmental salinity affects plastic nanoparticle agglomeration.

show abstract

The difference of aggregation mechanism between microplastics and nanoplastics: Role of Brownian motion and structural layer force

Cited by 71 publications

References 56 publications

Functionalized Nanoplastics (NPs) Increase the Toxicity of Metals in Fish Cell Lines

Functionalized Nanoplastics (NPs) Increase the Toxicity of Metals in Fish Cell Lines

Microplastics release from victuals packaging materials during daily usage

Effect of Nanoplastic Type and Surface Chemistry on Particle Agglomeration over a Salinity Gradient

Contact Info

Product

Resources

About