Titanium dioxide nanoparticles as carrier facilitate bioaccumulation of phenanthrene in marine bivalve, ark shell (Scapharca subcrenata)

TitleTitanium dioxide nanoparticles as carrier facilitate bioaccumulation of phenanthrene in marine bivalve, ark shell (Scapharca subcrenata)
Publication TypeJournal Article
Year of Publication2014
AuthorsTian S.Y, Zhang Y.D, Song C.Z, Zhu X.S, Xing B.S
JournalEnvironmental Pollution
Volume192
Pagination59-64
Date Published2014/09
Type of ArticleArticle
ISBN Number0269-7491
Accession NumberWOS:000339774200008
Keywordsaccumulation; adsorption; bioaccumulation; bioavailability; carbon nanotubes; digestive gland; Marine bivalve; metal-oxide nanoparticles; mytilus-galloprovincialis; Phenanthrene; polybrominated diphenyl ethers; polycyclic aromatic-hydrocarbons; tio2 nanoparticles; Titanium dioxide nanoparticles; toxicity
Abstract

To evaluate the impact of titanium dioxide nanoparticles (nTiO(2)) on the uptake of hydrophobic organic chemicals by marine bivalves, we conducted a comparative bioaccumulation study by exposing clam, Scapharca subcrenata, to phenanthrene (Phe) in the presence and absence of nTiO(2). The large surface area of nTiO(2) resulted in adsorption of co-existing Phe in aqueous solution to form nTiO(2)-Phe complexes. Accumulation of nTiO(2) was not observed in clams at exposed concentration (500 mu g/L) in this study. However, enhanced uptake of Phe by clams was observed in the presence of nTiO(2), with k(u) and BAFs values being 2 and 1.7 times higher than that of Phe alone, respectively. The enhanced uptake can be explained by ingestion of nTiO(2)-Phe complexes into the gut and subsequent desorption of Phe there. Therefore, nTiO(2) as a carrier facilitated the uptake of Phe by marine bivalves. (C) 2014 Elsevier Ltd. All rights reserved.

DOI10.1016/j.envpol.2014.05.010
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