Cited by 269Microplastics and Plastic PollutionEnvironmental Toxicology and EcotoxicologyPharmaceutical and Antibiotic Environmental Impacts

Influence of nanoplastic surface charge on eco-corona formation, aggregation and toxicity to freshwater zooplankton

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Saavedra, Juan, Stoll, Serge, Slaveykova, Vera I.·2019·Environmental Pollution

Abstract

Concerns about possible environmental implications of nano- and micro-plastics are continuously raising. Hence, comprehensive understanding of their behaviour, bioaccumulation and toxicity potential is required. Nevertheless, systematic studies on their fate and possible effects in freshwaters, as well as the influence of particle-specific and environmental factors on their behaviour and impacts are still missing. The aims of the present study are thus two-fold: (i) to examine the role of the surface charge on nanoplastic stability and acute effects to freshwater zooplankton; (ii) to decipher the influence of the refractory natural organic matter (NOM) on the nanoplastic fate and effects. Amidine and carboxyl-stabilized polystyrene (PS) spheres of 200 nm diameter characterized by opposite primary surface charges and neutral buoyancy were selected as model nanoplastics. The results demonstrated that the surface functionalization of the polystyrene nanoplastics controls their aggregation behaviour. Alginate or Suwannee River humic acid (SRHA) modified significantly the surface charge of positively-charged amidine PS nanoplastic and the aggregation state, while had no significant influence on the negatively-charged carboxyl PS nanoplastic. Both amidine and carboxyl PS nanoplastics were ingested by the zooplankton and concentrated mainly in the gut of water flea Daphnia magna and larvae Thamnocephalus platyurus, and the stomach of rotifer Brachionus calyciflorus. Amidine PS nanoplastic was more toxic than carboxyl one. The toxicity decreased in the order D. magna (48 h -immobilization) > B. calyciflorus (24 h - lethality) > T. platyurus (24 h - lethality). Alginate or SRHA reduced significantly the toxicity of both amidine and carboxyl PS nanoplastics to the studied zooplankton representatives. The implications of this laboratory study findings to natural environment were discussed.

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Crossref · 10.1016/j.envpol.2019.05.135

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  • The difference in physicochemical characteristics of nanoplastic aggregates compared to parent nanoplastics will affect interactions of nanoplastics and aquatic life.

    “Finally, the difference in physicochemical characteristics of nanoplastic aggregates compared to the parent nanoplastic will also affect interactions of nanoplastics and aquatic life.145,146”

    From The fate of plastic in the ocean environment – a minireview (2021) · cites this paper as [146]

  • A corona increases the likelihood of particle aggregation and changes the particle surface chemistry, which may reduce toxicity.

    “A corona increases the likelihood of particle aggregation and also changes the particles surface chemistry, which may reduce toxicity.145,146”

    From The fate of plastic in the ocean environment – a minireview (2021) · cites this paper as [146]

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Authors
Saavedra, J., Stoll, S., & Slaveykova, V. I.
Affiliations
University of Geneva (CH)
Corresponding author
Slaveykova, Vera I.
Venue
Environmental Pollution
Publisher
Elsevier BV
Published
2019-09
Volume
252
Issue
Pt A
Pages
715-722
ISSN
0269-7491 (ISSN-L)
OpenAlex
W2947354686
Cited by
269
References
44
Citations by year
2026: 42 · 2025: 30 · 2024: 37 · 2023: 43 · 2022: 56 · 2021: 31 · 2020: 26 · 2019: 4
FWCI
8.76
Type
journal article
Language
en
Open access
Locations
  • Environmental Pollution (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (acceptedVersion, other-oa)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Pollution › Pharmaceutical and Antibiotic Environmental Impacts
Keywords
nanoplastics, surface charge, polystyrene nanoparticles, carboxyl functionalization, nanoparticle aggregation, corona formation, natural organic matter, alginate, Suwannee River humic acid, freshwater zooplankton, Daphnia magna, Brachionus calyciflorus, Thamnocephalus platyurus, nanoplastic toxicity, bioaccumulation, immobilization, lethality
MeSH terms
Animals, Daphnia, Fresh Water, Humic Substances, Larva, Plastics, Polystyrenes, Rotifera, Zooplankton, Anostraca, Gastropoda, Nanoparticles

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