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Environmental Feedbacks and Engineered Nanoparticles: Mitigation of Silver Nanoparticle Toxicity to Chlamydomonas reinhardtii by Algal-Produced Organic Compounds


Stevenson, L.M.; Dickson, H.; Klanjšček, T.; Keller, A.A.; McCauley, E.; Nisbet, R.M.
Environmental Feedbacks and Engineered Nanoparticles: Mitigation of Silver Nanoparticle Toxicity to Chlamydomonas reinhardtii by Algal-Produced Organic Compounds // Public Library of Science ONE, 8 (2013), 9; e74456-1 doi:10.1371/journal.pone.0074456 (međunarodna recenzija, članak, znanstveni)


Naslov
Environmental Feedbacks and Engineered Nanoparticles: Mitigation of Silver Nanoparticle Toxicity to Chlamydomonas reinhardtii by Algal-Produced Organic Compounds

Autori
Stevenson, L.M. ; Dickson, H. ; Klanjšček, T. ; Keller, A.A. ; McCauley, E. ; Nisbet, R.M.

Izvornik
Public Library of Science ONE (1932-6203) 8 (2013), 9; E74456-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Ion-release kinetics; humic-acid; water

Sažetak
The vast majority of nanotoxicity studies measures the effect of exposure to a toxicant on an organism and ignores the potentially important effects of the organism on the toxicant. We investigated the effect of citrate-coated silver nanoparticles (AgNPs) on populations of the freshwater alga Chlamydomonas reinhardtii at different phases of batch culture growth and show that the AgNPs are most toxic to cultures in the early phases of growth. We offer strong evidence that reduced toxicity occurs because extracellular dissolved organic carbon (DOC) compounds produced by the algal cells themselves mitigate the toxicity of AgNPs. We analyzed this feedback with a dynamic model incorporating algal growth, nanoparticle dissolution, bioaccumulation of silver, DOC production and DOC-mediated inactivation of nanoparticles and ionic silver. Our findings demonstrate how the feedback between aquatic organisms and their environment may impact the toxicity and ecological effects of engineered nanoparticles.

Izvorni jezik
Engleski

Znanstvena područja
Biologija



POVEZANOST RADA


Projekt / tema
098-0982934-2719 - Ekološko modeliranje za održivo upravljanje resursima (Tarzan Legović, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Autor s matičnim brojem:
Tin Klanjšček, (289255)

Časopis indeksira:


  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE


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