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Silver nanoparticle - algae interactions: oxidative dissolution, reactive oxygen species generation and synergistic toxic effects
journal contribution
posted on 2023-05-18, 01:00 authored by He, D, Dorantes Aranda, JJ, Waite, TDThe short-term toxicity of citrate-stabilized silver nanoparticles (AgNPs) and ionic silver Ag(I) to the ichthyotoxic marine raphidophyte Chattonella marina has been examined using the fluorometric indicator alamarBlue. Aggregation and dissolution of AgNPs occurred after addition to GSe medium while uptake of dissolved Ag(I) occurred in the presence of C. marina. Based on total silver mass, toxicity was much higher for Ag(I) than for AgNPs. Cysteine, a strong Ag(I) ligand, completely removed the inhibitory effects of Ag(I) and AgNPs on the metabolic activity of C. marina, suggesting that the toxicity of AgNPs was due to the release of Ag(I). Synergistic toxic effects of AgNPs/Ag(I) and C. marina to fish gill cells were observed with these effects possibly attributable to enhancement in the generation of reactive oxygen species by C. marina on exposure of the organism to silver.
History
Publication title
Environmental Science and Technology (Washington)Volume
46Pagination
8731-8738ISSN
0013-936XDepartment/School
Institute for Marine and Antarctic StudiesPublisher
Amer Chemical SocPlace of publication
1155 16Th St, Nw, Washington, USA, Dc, 20036Rights statement
Coyright 2012 American Chemical SocietyRepository Status
- Restricted