Enhanced Accumulation of Arsenate in Carp in the Presence of Titanium Dioxide Nanoparticles

In this study adsorption of arsenic (As) onto TiO₂ nanoparticles and the facilitated transport of As into carp (Cyprinus carpio) by TiO₂ nanoparticles was examined. Adsorption kinetics and adsorption isotherm were conducted by adding As(V) to TiO₂ suspensions. Facilitated transport of As by TiO₂ nan...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2007-01, Vol.178 (1-4), p.245-254
Main Authors: Sun, H, Zhang, X, Niu, Q, Chen, Y, Crittenden, J.C
Format: Article
Language:English
Subjects:
Accumulation
Adsorption
Animal, plant and microbial ecology
Applied ecology
arsenates
Arsenic
bioaccumulation
Biological and medical sciences
Carp
Cyprinus carpio
Ecotoxicology, biological effects of pollution
Environmental monitoring
food contamination
Freshwater
Fundamental and applied biological sciences. Psychology
General aspects
Gills
Intestine
Intestines
Isotherms
liver
Muscles
Nanoparticles
nanotechnology
particle size
pharmacokinetics
physiological transport
sorption isotherms
Stomach
tissue distribution
Titanium dioxide
toxicity testing
Transport
Water pollution
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Summary:In this study adsorption of arsenic (As) onto TiO₂ nanoparticles and the facilitated transport of As into carp (Cyprinus carpio) by TiO₂ nanoparticles was examined. Adsorption kinetics and adsorption isotherm were conducted by adding As(V) to TiO₂ suspensions. Facilitated transport of As by TiO₂ nanoparticles was assessed by accumulation tests exposing carp to As(V) contaminated water in the presence of TiO₂ nanoparticles. The results showed that TiO₂ nanoparticles had a significant adsorption capacity for As(V). Equilibrium was established within 30 min and the isotherm data was described by Freundlich isotherm. The KF and 1/n were 20.71 mg/g and 0.58, respectively. When exposed to As(V)-contaminated water in the presence of TiO₂ nanoparticles, carp accumulated considerably more As, and As concentration in carp increased by 132% after 25 days exposure. Considerable As and TiO₂ accumulated in intestine, stomach and gills of the fish, and the lowest level of accumulation was found in muscle. Accumulation of As and TiO₂ in stomach, intestine and gills are significant. Arsenic accumulation in these tissues was enhanced by the presence of TiO₂ nanoparticles. TiO₂ nanoparticles that have accumulated in intestine and gills may release adsorbed As and As bound on TiO₂ nanoparticles which cannot be released maybe transported by TiO₂ nanoparticles as they transferred in the body. In this work, an enhancement of 80% and 126% As concentration in liver and muscle after 20 days of exposure was found.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-006-9194-y