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Article: Hydrophobic Surface Coating Can Reduce Toxicity of Zinc Oxide Nanoparticles to the Marine Copepod Tigriopus japonicus

TitleHydrophobic Surface Coating Can Reduce Toxicity of Zinc Oxide Nanoparticles to the Marine Copepod Tigriopus japonicus
Authors
Keywordsfunctionalization
surface modification
aggregation
ion dissolution
oxidative stress
Issue Date2021
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag
Citation
Environmental Science & Technology, 2021, v. 55 n. 10, p. 6917-6925 How to Cite?
AbstractCoated zinc oxide nanoparticles (ZnO-NPs) are more commonly applied in commercial products but current risk assessments mostly focus on bare ZnO-NPs. To investigate the impacts of surface coatings, this study examined acute and chronic toxicities of six chemicals, including bare ZnO-NPs, ZnO-NPs with three silane coatings of different hydrophobicity, zinc oxide bulk particles (ZnO-BKs), and zinc ions (Zn-IONs), toward a marine copepod, Tigriopus japonicus. In acute tests, bare ZnO-NPs and hydrophobic ZnO-NPs were less toxic than hydrophilic ZnO-NPs. Analyses of the copepod’s antioxidant gene expression suggested that such differences were governed by hydrodynamic size and ion dissolution of the particles, which affected zinc bioaccumulation in copepods. Conversely, all test particles, except the least toxic hydrophobic ZnO-NPs, shared similar chronic toxicity as Zn-IONs because they mostly dissolved into zinc ions at low test concentrations. The metadata analysis, together with our test results, further suggested that the toxicity of coated metal-associated nanoparticles could be predicted by the hydrophobicity and density of their surface coatings. This study evidenced the influence of surface coatings on the physicochemical properties, toxicity, and toxic mechanisms of ZnO-NPs and provided insights into the toxicity prediction of coated nanoparticles from their coating properties to improve their future risk assessment and management.
Persistent Identifierhttp://hdl.handle.net/10722/300777
ISSN
2023 Impact Factor: 10.8
2023 SCImago Journal Rankings: 3.516
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLai, RWS-
dc.contributor.authorKang, HM-
dc.contributor.authorZhou, GJ-
dc.contributor.authorYung, MMN-
dc.contributor.authorHE, YL-
dc.contributor.authorNg, AMC-
dc.contributor.authorLi, XY-
dc.contributor.authorDjurisic, AB-
dc.contributor.authorLee, JS-
dc.contributor.authorLeung, KMY-
dc.date.accessioned2021-07-06T03:10:06Z-
dc.date.available2021-07-06T03:10:06Z-
dc.date.issued2021-
dc.identifier.citationEnvironmental Science & Technology, 2021, v. 55 n. 10, p. 6917-6925-
dc.identifier.issn0013-936X-
dc.identifier.urihttp://hdl.handle.net/10722/300777-
dc.description.abstractCoated zinc oxide nanoparticles (ZnO-NPs) are more commonly applied in commercial products but current risk assessments mostly focus on bare ZnO-NPs. To investigate the impacts of surface coatings, this study examined acute and chronic toxicities of six chemicals, including bare ZnO-NPs, ZnO-NPs with three silane coatings of different hydrophobicity, zinc oxide bulk particles (ZnO-BKs), and zinc ions (Zn-IONs), toward a marine copepod, Tigriopus japonicus. In acute tests, bare ZnO-NPs and hydrophobic ZnO-NPs were less toxic than hydrophilic ZnO-NPs. Analyses of the copepod’s antioxidant gene expression suggested that such differences were governed by hydrodynamic size and ion dissolution of the particles, which affected zinc bioaccumulation in copepods. Conversely, all test particles, except the least toxic hydrophobic ZnO-NPs, shared similar chronic toxicity as Zn-IONs because they mostly dissolved into zinc ions at low test concentrations. The metadata analysis, together with our test results, further suggested that the toxicity of coated metal-associated nanoparticles could be predicted by the hydrophobicity and density of their surface coatings. This study evidenced the influence of surface coatings on the physicochemical properties, toxicity, and toxic mechanisms of ZnO-NPs and provided insights into the toxicity prediction of coated nanoparticles from their coating properties to improve their future risk assessment and management.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag-
dc.relation.ispartofEnvironmental Science & Technology-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.subjectfunctionalization-
dc.subjectsurface modification-
dc.subjectaggregation-
dc.subjection dissolution-
dc.subjectoxidative stress-
dc.titleHydrophobic Surface Coating Can Reduce Toxicity of Zinc Oxide Nanoparticles to the Marine Copepod Tigriopus japonicus-
dc.typeArticle-
dc.identifier.emailLi, XY: xlia@hkucc.hku.hk-
dc.identifier.emailDjurisic, AB: dalek@hku.hk-
dc.identifier.authorityLi, XY=rp00222-
dc.identifier.authorityDjurisic, AB=rp00690-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acs.est.1c01300-
dc.identifier.pmid33961412-
dc.identifier.scopuseid_2-s2.0-85106503560-
dc.identifier.hkuros323110-
dc.identifier.volume55-
dc.identifier.issue10-
dc.identifier.spage6917-
dc.identifier.epage6925-
dc.identifier.isiWOS:000654292200039-
dc.publisher.placeUnited States-

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