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Article: Toxicities of nano zinc oxide to five marine organisms: Influences of aggregate size and ion solubility

TitleToxicities of nano zinc oxide to five marine organisms: Influences of aggregate size and ion solubility
Authors
KeywordsAlgae
Biomarker
Crustacean
Medaka
Zinc oxide
Issue Date2010
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00216/index.htm
Citation
Analytical And Bioanalytical Chemistry, 2010, v. 396 n. 2, p. 609-618 How to Cite?
AbstractNano zinc oxide (nZnO) is increasingly used in sunscreen products, with high potential of being released directly into marine environments. This study primarily aimed to characterize the aggregate size and solubility of nZnO and bulk ZnO, and to assess their toxicities towards five selected marine organisms. Chemical characterization showed that nZnO formed larger aggregates in seawater than ZnO, while nZnO had a higher solubility in seawater (3.7 mg L -1) than that of ZnO (1.6 mg L -1). Acute tests were conducted using the marine diatoms Skeletonema costatum and Thalassiosia pseudonana, the crustaceans Tigriopus japonicus and Elasmopus rapax, and the medaka fish Oryzias melastigma. In general, nZnO was more toxic towards algae than ZnO, but relatively less toxic towards crustaceans and fish. The toxicity of nZnO could be mainly attributed to dissolved Zn 2+ ions. Furthermore, molecular biomarkers including superoxide dismutase (SOD), metallothionein (MT) and heat shock protein 70 (HSP70) were employed to assess the sublethal toxicities of the test chemicals to O. melastigma. Although SOD and MT expressions were not significantly increased in nZnO-treated medaka compared to the controls, exposure to ZnO caused a significant up-regulation of SOD and MT. HSP70 was increased two to fourfold in all treatments indicating that there were probably other forms of stress in additional to oxidative stress such as cellular injury. © 2009 Springer-Verlag.
Persistent Identifierhttp://hdl.handle.net/10722/80687
ISSN
2015 Impact Factor: 3.125
2015 SCImago Journal Rankings: 1.096
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWong, SWYen_HK
dc.contributor.authorLeung, PTYen_HK
dc.contributor.authorDjurišić, ABen_HK
dc.contributor.authorLeung, KMYen_HK
dc.date.accessioned2010-09-06T08:09:11Z-
dc.date.available2010-09-06T08:09:11Z-
dc.date.issued2010en_HK
dc.identifier.citationAnalytical And Bioanalytical Chemistry, 2010, v. 396 n. 2, p. 609-618en_HK
dc.identifier.issn1618-2642en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80687-
dc.description.abstractNano zinc oxide (nZnO) is increasingly used in sunscreen products, with high potential of being released directly into marine environments. This study primarily aimed to characterize the aggregate size and solubility of nZnO and bulk ZnO, and to assess their toxicities towards five selected marine organisms. Chemical characterization showed that nZnO formed larger aggregates in seawater than ZnO, while nZnO had a higher solubility in seawater (3.7 mg L -1) than that of ZnO (1.6 mg L -1). Acute tests were conducted using the marine diatoms Skeletonema costatum and Thalassiosia pseudonana, the crustaceans Tigriopus japonicus and Elasmopus rapax, and the medaka fish Oryzias melastigma. In general, nZnO was more toxic towards algae than ZnO, but relatively less toxic towards crustaceans and fish. The toxicity of nZnO could be mainly attributed to dissolved Zn 2+ ions. Furthermore, molecular biomarkers including superoxide dismutase (SOD), metallothionein (MT) and heat shock protein 70 (HSP70) were employed to assess the sublethal toxicities of the test chemicals to O. melastigma. Although SOD and MT expressions were not significantly increased in nZnO-treated medaka compared to the controls, exposure to ZnO caused a significant up-regulation of SOD and MT. HSP70 was increased two to fourfold in all treatments indicating that there were probably other forms of stress in additional to oxidative stress such as cellular injury. © 2009 Springer-Verlag.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00216/index.htmen_HK
dc.relation.ispartofAnalytical and Bioanalytical Chemistryen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectAlgaeen_HK
dc.subjectBiomarkeren_HK
dc.subjectCrustaceanen_HK
dc.subjectMedakaen_HK
dc.subjectZinc oxideen_HK
dc.subject.meshCopepoda - drug effects-
dc.subject.meshDiatoms - drug effects-
dc.subject.meshFish Proteins - genetics - metabolism-
dc.subject.meshOryzias - genetics - metabolism-
dc.subject.meshZinc Oxide - chemistry - toxicity-
dc.titleToxicities of nano zinc oxide to five marine organisms: Influences of aggregate size and ion solubilityen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1618-2642&volume=396&issue=2&spage=609&epage=618&date=2010&atitle=Toxicities+of+nano+zinc+oxide+to+five+marine+organisms:+influences+of+aggregate+size+and+ion+solubilityen_HK
dc.identifier.emailDjurišić, AB: dalek@hku.hken_HK
dc.identifier.emailLeung, KMY: kmyleung@hku.hken_HK
dc.identifier.authorityDjurišić, AB=rp00690en_HK
dc.identifier.authorityLeung, KMY=rp00733en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00216-009-3249-zen_HK
dc.identifier.pmid19902187-
dc.identifier.scopuseid_2-s2.0-76849117512en_HK
dc.identifier.hkuros168662en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-76849117512&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume396en_HK
dc.identifier.issue2en_HK
dc.identifier.spage609en_HK
dc.identifier.epage618en_HK
dc.identifier.eissn1618-2650-
dc.identifier.isiWOS:000272910400007-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridWong, SWY=55261496800en_HK
dc.identifier.scopusauthoridLeung, PTY=35740926800en_HK
dc.identifier.scopusauthoridDjurišić, AB=7004904830en_HK
dc.identifier.scopusauthoridLeung, KMY=7401860738en_HK

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