Document Detail

Toxicity of copper oxide nanoparticle suspensions to aquatic biota.
MedLine Citation:
PMID:  22020877     Owner:  NLM     Status:  Publisher    
Toxicity effects induced by nanosuspensions of CuO (<50 nm; Sigma-Aldrich) on macrophytic algae cells of Nitellopsis obtusa (96-h median lethal concentration [LC50]), microphytic algae Chlorella (30-min median inhibitory concentration [IC50]), shrimp Thamnocephalus platyurus (24-h LC50), and rotifer Brachionus calyciflorus (24-h LC50) were investigated. No substantial differences between the effects of nonsonicated and sonicated nCuO suspensions were observed. The particle size distribution analysis accomplished by the laser diffraction technique at suspension concentration from 3 to 100 mg/L revealed fast (within 5 min) reagglomeration of the particles after the sonication. The observed adverse effects on N. obtusa cells may be attributed to nanoparticles per se, but not to ionic copper, because neither chemical analysis nor biological testing (i.e., algae survived in the supernatants of suspensions) confirmed the presence of cupric ions in toxic amounts. Contrary to ionic copper form, nCuO delayed the initial phase of N. obtusa cell membrane depolarization. Lethality tests with rewash demonstrated that the least used 5-min exposure in 100 mg/L nCuO sonicated suspension induced 70% mortality in charophyte cells after 8 d, while the rewash after short exposure in noticeably toxic concentration of Cu(2+) prevented cell mortality. The obtained data suggested the possible influence of a thick charophyte cell wall on the dynamics of nanotoxicity effects. Environ. Toxicol. Chem. © 2011 SETAC.
Levonas Manusadžianas; Celine Caillet; Louis Fachetti; Brigita Gylytė; Reda Grigutytė; Sigita Jurkonienė; Rolandas Karitonas; Kazys Sadauskas; Fabien Thomas; Rimantas Vitkus; Jean-François Férard
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-10-21
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  -     ISSN:  1552-8618     ISO Abbreviation:  -     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 SETAC.
Institute of Botany of the Nature Research Centre, Vilnius, Lithuania.
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