Ecotoxicological assessment of TiO2 byproducts on the earthworm Eisenia fetida - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Environmental Pollution Année : 2011

Ecotoxicological assessment of TiO2 byproducts on the earthworm Eisenia fetida

Catherine Sirguey

Résumé

The increasing production of nanomaterials will in turn increase the release of nanosized byproducts to the environment. The aim of this study was to evaluate the behaviour, uptake and ecotoxicity of TiO2 byproducts in the earthworm Eisenia fetida. Worms were exposed to suspensions containing 0.1, 1 and 10 mg/L of byproducts for 24 h. Size of TiO2 byproducts showed aggregation of particles up to 700 mu m with laser diffraction. Only worms exposed at 10 mg/L showed bioaccumulation of titanium (ICP-AES), increasing expression of metallothionein and superoxide dismutase mRNA (Real-time PCR) and induction of apoptotic activity (Apostain and TUNEL). TiO2 byproducts did not induce cytotoxicity on ccelomocytes, but a significant decrease of phagocytosis was observed starting from 0.1 mg/L In conclusion, bioaccumulation of byproducts and their production of reactive oxygen species could be responsible for the alteration of the antioxidant system in worms. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

Dates et versions

hal-01426207 , version 1 (04-01-2017)

Identifiants

Citer

Emilie Bigorgne, Laurent Foucaud, Lapied Emmanuel, Jérôme Labille, Céline Botta, et al.. Ecotoxicological assessment of TiO2 byproducts on the earthworm Eisenia fetida. Environmental Pollution, 2011, 159 (10), pp.2698-2705. ⟨10.1016/j.envpol.2011.05.024⟩. ⟨hal-01426207⟩
155 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More