title: Titanium dioxide nanoparticles as carrier facilitate bioaccumulation of phenanthrene in marine bivalve, ark shell (Scapharca subcrenata).
abstract: To evaluate the impact of titanium dioxide nanoparticles (nTiO2) 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 nTiO2. The large surface area of nTiO2 resulted in adsorption of co-existing Phe in aqueous solution to form nTiO2-Phe complexes. Accumulation of nTiO2 was not observed in clams at exposed concentration (500 μg/L) in this study. However, enhanced uptake of Phe by clams was observed in the presence of nTiO2, with ku 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 nTiO2-Phe complexes into the gut and subsequent desorption of Phe there. Therefore, nTiO2 as a carrier facilitated the uptake of Phe by marine bivalves.
authors.affiliation: College of Marine Science and Engineering, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, PR China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA. Electronic address: tiansy@tust.edu.cn.
authors.forename: Shengyan
authors.initials: S
authors.lastname: Tian
authors.affiliation: College of Marine Science and Engineering, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, PR China.
authors.forename: Yaodan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Marine Science and Engineering, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin 300457, PR China.
authors.forename: Chunzheng
authors.initials: C
authors.lastname: Song
authors.affiliation: Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093, USA. Electronic address: zhu.xiaoshan@sz.tsinghua.edu.cn.
authors.forename: Xiaoshan
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.
authors.forename: Baoshan
authors.initials: B
authors.lastname: Xing
mesh_terms: D000327:Adsorption; D000818:Animals; D049893:Arcidae / Q000378:metabolism*; D053758:Nanoparticles / Q000737:chemistry / Q000378:metabolism*; D010616:Phenanthrenes / Q000737:chemistry / Q000378:metabolism*; D020379:Risk Adjustment; D014025:Titanium / Q000737:chemistry / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism*
chemical_list: D010616:Phenanthrenes; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C031181:phenanthrene; D014025:Titanium
keywords: Adsorption; Bioaccumulation; Marine bivalve; Phenanthrene; Titanium dioxide nanoparticles