Acute toxicity of nanosized TiO2 to Daphnia magna under UVA irradiation

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dc.contributor.authorAmiano, Irene
dc.contributor.authorOlabarrieta, Josune
dc.contributor.authorVitorica, Joana
dc.contributor.authorZorita, Saioa
dc.contributor.institutionDF_Bioeficacia
dc.contributor.institutionADAPTACIÓN AL CAMBIO CLIMÁTICO
dc.date.accessioned2024-07-24T12:15:27Z
dc.date.available2024-07-24T12:15:27Z
dc.date.issued2012-11
dc.description.abstractThe production and use of nanoparticles (NPs), especially those of titanium dioxide (TiO2) have increased steadily within the last decade. Common knowledge of photoactive nanosized TiO2 (nTiO2) effects on freshwater organisms is largely limited to acute toxicity tests without taking into consideration solar ultraviolet-A (UVA) irradiation. The authors' approach in the present study, based on a combination of a standardized ecotoxicology method (Organization for Economic Cooperation and Development [OECD] test 202) and the expected solar UVA contribution, will allow a more realistic understanding of the toxicity of TiO2 to Daphnia magna. The results show that the contribution of UVA to TiO2 toxicity cannot be ignored. The half-maximal effective concentration values (median effective concentration [EC50], immobilization as the endpoint) using Organization for Standardization (ISO) test water as well as river water decreased from 29.7 to 33.6mg/L under dark conditions to 1.2 to 3.4mg/L TiO2 after exposure to 0.56mW/cm2 UVA radiation. The authors also discuss possible mechanisms of NPs toxicity and the accuracy of results in terms of problems observed, such as solubilization and sedimentation of NPs, in ecotoxicological testing of nTiO2.en
dc.description.statusPeer reviewed
dc.format.extent3
dc.identifier.citationAmiano , I , Olabarrieta , J , Vitorica , J & Zorita , S 2012 , ' Acute toxicity of nanosized TiO 2 to Daphnia magna under UVA irradiation ' , Environmental Toxicology and Chemistry , vol. 31 , no. 11 , pp. 2564-2566 . https://doi.org/10.1002/etc.1981
dc.identifier.doi10.1002/etc.1981
dc.identifier.issn0730-7268
dc.identifier.urihttps://hdl.handle.net/11556/4578
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84867715400&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofEnvironmental Toxicology and Chemistry
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsAcute ecotoxicity
dc.subject.keywordsDaphnia magna
dc.subject.keywordsPhotocatalytic titanium dioxide nanoparticles
dc.subject.keywordsReactive oxygen species
dc.subject.keywordsUV radiation
dc.subject.keywordsEnvironmental Chemistry
dc.subject.keywordsHealth, Toxicology and Mutagenesis
dc.titleAcute toxicity of nanosized TiO2 to Daphnia magna under UVA irradiationen
dc.typejournal article
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