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Tytuł pozycji:

The stochastic association of nanoparticles with algae at the cellular level: Effects of NOM, particle size and particle shape

Tytuł:
The stochastic association of nanoparticles with algae at the cellular level: Effects of NOM, particle size and particle shape
Autorzy:
Fazel Abdolahpur Monikh
Latifeh Chupani
Zhiling Guo
Peng Zhang
Gopala Krishna Darbha
Martina G. Vijver
Eugenia Valsami-Jones
Willie J.G.M. Peijnenburg
Temat:
Nanoparticle
Particle number
Natural organic matter
ScICP-MS
Extracellular polymeric substances
Environmental pollution
TD172-193.5
Environmental sciences
GE1-350
Źródło:
Ecotoxicology and Environmental Safety, Vol 218, Iss , Pp 112280- (2021)
Wydawca:
Elsevier, 2021.
Rok publikacji:
2021
Kolekcja:
LCC:Environmental pollution
LCC:Environmental sciences
Typ dokumentu:
article
Opis pliku:
electronic resource
Język:
English
ISSN:
0147-6513
Relacje:
http://www.sciencedirect.com/science/article/pii/S0147651321003912; https://doaj.org/toc/0147-6513
DOI:
10.1016/j.ecoenv.2021.112280
Dostęp URL:
https://doaj.org/article/73f56d6b48974068b3fa8071f830ce2c  Link otwiera się w nowym oknie
Numer akcesji:
edsdoj.73f56d6b48974068b3fa8071f830ce2c
Czasopismo naukowe
Association of nanoparticles (NPs) with algae likely plays a critical role in their transfer in aquatic food chains. Although our understanding of the ecotoxicity and fate of NPs in the environment is increasing, it is still unclear how the physicochemical properties of NPs influence their interaction with algae at cellular levels and how this is reflected at a population level. This is due to the limitation in the existing analytical techniques to quantify the association of NPs with cells. To fill this data gap, we applied the novel technique of single-cell inductively coupled plasma mass spectrometry to quantify the cellular association of gold (Au)-NPs with algal cells (Pseudokirchneriella subcapitata) as a function of particle size, shape (spherical 10 nm, spherical 60 nm, spherical 100 nm, rod-shaped 10 × 40 nm, and rod-shaped 50 × 100 nm), and surface chemistry [citrate and natural organic matter (NOM) coating] on a cell-by-cell basis. The association of Au-NPs with algal cells was found to be a random probability following a so-called stochastic process; after 72 h of exposure, less than 45% of the cell population accumulated NPs on their surface. The number of Au-NPs per cell was found to be heterogeneously distributed as some cells were associated with a significantly higher number (e.g. up to 600 spherical 10 nm particles per cell) of Au-NPs than other cells present in the medium. The presence of NOM on the surface of the particles decreased the percentage of cells containing NPs except for the spherical 60 nm Au-NPs. We conclude that some algae within a population can accumulate NPs on their surface and this accumulation is influenced by the size, shape, and surface chemistry of NPs. It is important to understand how NPs may enter aquatic food chains to assess the possible risk.

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