Article,
Bioaccumulation of titanium dioxide nanoparticles in carp
Huanjing Kexue, 27 (8): 1631--1635 (2006)
Abstract
Analysis method for TiO2 nanoparticles in water and fish samples was set up using ICP-AES after dissolved by solution of sulphuric acid and ammonium sulphate. Meanwhile bioaccumulation of TiO2 nanoparticles was assessed by tests exposing carp (Cyprinus carpio) to TiO2 nanoparticles suspensions. The relative standard deviation (RSD) for water sample of 20.0 mg/L TiO2 is 4.53%, and the recoveries of TiO2 nanoparticles in water and fish samples are raging from 94% - 104% and 90% - 103 %, which could ensure accurate measurement of TiO2 nanoparticles. TiO2 nanoparticles have a significant bioaccumulation by the carp, and TiO2 nanoparticles concentrations in carp exposed to 3 mg/L and 10 mg/L TiO2 nanoparticles suspensions for 25 days are 2.1 mg/g and 5.8 mg/g respectively, and the BCF values at equilibrium are 675.5 and 595.4 respectively. Significant As and TiO2 accumulation occurs in viscus and gills of fish, while bioaccumulation of TiO2 nanoparticles in muscle is relative small.
