10.4122/1.1000001343
Nakajima, F.
F.
Nakajima
Saito, K.
K.
Saito
Isozaki, Y.
Y.
Isozaki
Furumai, H.
H.
Furumai
Christensen, A.M
A.M
Christensen
Baun, A.
A.
Baun
Ledin, A.
A.
Ledin
Mikkelsen, P.S.
P.S.
Mikkelsen
Transfer of hydrophobic contaminants in urban runoff particles to benthic organisms estimated by an in vitro bioaccessibility test
DTU Library, Technical University of Denmark (DTU)
2005
Conference presentation
Benthic organisms
bioaccessibility
polycyclic aromatic hydrocarbons
road dust
sediment
The University Of Tokyo, Research Center For Advanced Science
Research Center For Advanced Science
The University Of Tokyo
The University Of Tokyo, Department Of Urban Engineering
Department Of Urban Engineering
The University Of Tokyo
Technical University Of Denmark, Environment
Environment
Technical University Of Denmark
2005
en
10.4122/1.1000001344
text/xml
An in vitro bioaccessibility test was applied for assessing the transfer of polycyclic aromatic hydrocarbons (PAHs) present in road dust, into benthic organisms living in receiving water body. The road dust is supposed to be urban runoff particles under wet weather conditions. Sodium dodecyl sulfate (SDS) solution was used as a hypothetical gut fluid. Pyrene, fluoranthene and phenanthrene were the main PAH species in the SDS extractable fraction of road dust as well as the whole extract. Benzo(ghi)perylene showed relatively low concentration in the SDS extract in spite of high concentration in the original dust. The PAH composition in benthic organisms (polychaetes) did not correspond with that of the surrounding sediment and the PAHs detected were also detected in high concentration in the SDS extract of road dust. When testing the toxicity of the extracted contaminants by a standardized algal toxicity test, SDS extracts of a detention pond sediment showed higher toxicity than the pore water of the corresponding sediment. Sediment suspension showed a comparative toxicity with 0.1% SDS extract. From the result, the in vitro bioaccessibility test seems more suitable to evaluate the exposed contaminants than the traditional organic solvent extraction method and the SDS extracted fraction is applicable to toxicity tests reflecting the digestive process.