Interplay between extracellular polymeric substances (EPS) from a marine diatom and model nanoplastic through eco-corona formation

Grassi, Giacomo; Gabellieri, Edi; Cioni, Patrizia; Paccagnini, Eugenio; Faleri, Claudia; Lupetti, Pietro; Corsi, Ilaria; Morelli, Elisabetta

doi:10.1016/j.scitotenv.2020.138457

Cited by 99 publications

(53 citation statements)

References 95 publications

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“…According to the manufacturer’s information, the PS particles utilised in our study possess sulfate groups on their surface and are negatively charged. Aggregation of negatively charged NPs upon entry into saline media is widely reported in the literature, 33, 78, 97 due to maximised particle attachment following the compression of the electrostatic double layer surrounding individual particles in high ionic strength media. 98, 99 The increased extent of aggregation of negatively charged plastic particles such as those used in our study is likely to have played a key role in the entrapment of E. huxleyi within plastic aggregates evident by microscopy.…”

Section: Resultsmentioning

confidence: 99%

“…34,43 However, interestingly Grassi et al (2020) found no adverse effect of negatively-charged PS-COOH NPs (0-0.01% w/v, 0-100 mg L -1 ) upon P. tricornutum after 72 h exposure in cultures supplemented with EPS, characterised by a reduction in intracellular ROS generation. 78 The presence of EPS was found to reduce aggregation of NPs, which were recorded to aggregate extensively upon entry into saline media, likely due to adsorption of EPS biomolecules onto the NP surface which is also hypothesised to enhance scavenging of harmful ROS. 78 Therefore, EPS may also mitigate plastic toxicity as well as facilitate physical cell-plastic interactions.…”

Section: Investigating the Impact Of Micro-and Nano-plastics Upon Growth Of Marine Phytoplanktonmentioning

confidence: 99%

“…78 The presence of EPS was found to reduce aggregation of NPs, which were recorded to aggregate extensively upon entry into saline media, likely due to adsorption of EPS biomolecules onto the NP surface which is also hypothesised to enhance scavenging of harmful ROS. 78 Therefore, EPS may also mitigate plastic toxicity as well as facilitate physical cell-plastic interactions.…”

Section: Investigating the Impact Of Micro-and Nano-plastics Upon Growth Of Marine Phytoplanktonmentioning

confidence: 99%

“…Interestingly, the presence of supplementary EPS derived from diatom species has been observed to significantly reduce ROS production in the presence of PS-COOH NPs (60 nm) at similar concentrations (0.001% and 0.005% w/v, 10 and 50 mg L -1 ). 78 This suggests that EPS displays antioxidant activity, 78 or by its presence mitigates the production of ROS by plastics. In the natural environment where concentration of EPS and related material is likely higher, NP-mediated ROS generation may be mitigated.…”

Section: Mechanistic Understanding Of the Adverse Effect Of Mp And Np On Large-size Phytoplankton A) Examining The Impact Of Plastic Expomentioning

confidence: 99%

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Cell size matters: nano- and micro-plastics preferentially drive declines of large marine phytoplankton due to co-aggregation

Dedman

Christie-Oleza

Fernández-Juárez

et al. 2021

Preprint

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Marine plastic pollution represents a key environmental concern. Whilst ecotoxicological data for plastic is increasingly available, its impact upon marine phytoplankton remains unclear. Owing to their predicted abundance in the marine environment and likely interactions with phytoplankton, here we focus on the smaller fraction of plastic particles (~50 nm and ~2 μm polystyrene spheres). Exposure of natural phytoplankton communities and laboratory cultures revealed that plastic exposure does not follow traditional trends in ecotoxicological research, since large phytoplankton appear particularly susceptible towards plastics exposure despite their higher surface-to-volume ratios. Cell declines appear driven by hetero-aggregation and co-sedimentation of cells with plastic particles, recorded visually and demonstrated using confocal microscopy. As a consequence, plastic exposure also caused disruption to photosynthetic functioning, as determined by both photosynthetic efficiency and high throughput proteomics. Negative effects upon phytoplankton are recorded at concentrations orders of magnitude above those estimated in the environment. Hence, it is likely that impacts of NPs and MPs are exacerbated at the high concentrations typically used in ecotoxicological research (i.e., mg L-1).

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Section: Resultsmentioning

confidence: 99%

Section: Investigating the Impact Of Micro-and Nano-plastics Upon Growth Of Marine Phytoplanktonmentioning

confidence: 99%

Section: Investigating the Impact Of Micro-and Nano-plastics Upon Growth Of Marine Phytoplanktonmentioning

confidence: 99%

Section: Mechanistic Understanding Of the Adverse Effect Of Mp And Np On Large-size Phytoplankton A) Examining The Impact Of Plastic Expomentioning

confidence: 99%

See 2 more Smart Citations

Cell size matters: nano- and micro-plastics preferentially drive declines of large marine phytoplankton due to co-aggregation

Dedman

Christie-Oleza

Fernández-Juárez

et al. 2021

Preprint

View full text Add to dashboard Cite

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“…Mainly high molecular weight polysaccharides and low molecular weight proteins were found adsorbed onto PS-COOH NP, out of the highly chemical heterogeneous continuum of P. tricornutum EPS. In turn, microscopic examination revealed the structure of the NP-EPS complexes, with a peculiar distribution of carbohydrates and proteins in the aggregates, rethinking the corona concepts in natural waters [ 102 ].…”

Section: Behavior and Exposure Assessment Of Enms In Marine Watersmentioning

confidence: 99%

Eco-Interactions of Engineered Nanomaterials in the Marine Environment: Towards an Eco-Design Framework

et al. 2021

Self Cite

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Marine nano-ecotoxicology has emerged with the purpose to assess the environmental risks associated with engineered nanomaterials (ENMs) among contaminants of emerging concerns entering the marine environment. ENMs’ massive production and integration in everyday life applications, associated with their peculiar physical chemical features, including high biological reactivity, have imposed a pressing need to shed light on risk for humans and the environment. Environmental safety assessment, known as ecosafety, has thus become mandatory with the perspective to develop a more holistic exposure scenario and understand biological effects. Here, we review the current knowledge on behavior and impact of ENMs which end up in the marine environment. A focus on titanium dioxide (n-TiO2) and silver nanoparticles (AgNPs), among metal-based ENMs massively used in commercial products, and polymeric NPs as polystyrene (PS), largely adopted as proxy for nanoplastics, is made. ENMs eco-interactions with chemical molecules including (bio)natural ones and anthropogenic pollutants, forming eco- and bio-coronas and link with their uptake and toxicity in marine organisms are discussed. An ecologically based design strategy (eco-design) is proposed to support the development of new ENMs, including those for environmental applications (e.g., nanoremediation), by balancing their effectiveness with no associated risk for marine organisms and humans.

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Nanoplastics and the Marine Environment

Corbett¹,

Amaral‐Zettler²

2022

Plastics and the Ocean

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Interplay between extracellular polymeric substances (EPS) from a marine diatom and model nanoplastic through eco-corona formation

Cited by 99 publications

References 95 publications

Cell size matters: nano- and micro-plastics preferentially drive declines of large marine phytoplankton due to co-aggregation

Cell size matters: nano- and micro-plastics preferentially drive declines of large marine phytoplankton due to co-aggregation

Eco-Interactions of Engineered Nanomaterials in the Marine Environment: Towards an Eco-Design Framework

Nanoplastics and the Marine Environment

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