|Title||Titanium dioxide nanoparticles as carrier facilitate bioaccumulation of phenanthrene in marine bivalve, ark shell (Scapharca subcrenata)|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Tian S.Y, Zhang Y.D, Song C.Z, Zhu X.S, Xing B.S|
|Type of Article||Article|
|Keywords||accumulation; 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|
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.