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- W2803262457 abstract "N-ethyl perfluorooctane sulfonamide (N-EtFOSA) is commonly known as the active ingredient of sulfluramid. It can be degraded to perfluorooctane sulfonic acid (PFOS) in biota and environment. Earthworms (Eisenia fetida) were exposed with N-EtFOSA to examine the bioaccumulation, elimination and metabolism of N-EtFOSA by the earthworms after in vivo and in vitro exposure. N-EtFOSA could be biodegraded in quartz sands to perfluorooctane sulfonamide (FOSA) and PFOS. In the in vivo tests, in addition to parent N-EtFOSA, three metabolites, including perfluorooctane sulfonamide acetate (FOSAA), FOSA and PFOS also accumulated in earthworms as a result of N-EtFOSA biotransformation, with FOSA as the predominant metabolite. The bioaccumulation factor (BAF) and uptake rate coefficient (ku) of N-EtFOSA from sand were 20.4 and 2.41·d−1, respectively. The elimination rate constants (ke) decreased in the order FOSAA (0.130·d−1) > N-EtFOSA (0.118·d−1) > FOSA (0.073·d−1) > PFOS (0.051·d−1). The biotransformation of N-EtFOSA in earthworm was further confirmed by the in vitro test involving incubation of earthworm homogenates with N-EtFOSA. This work provides evidence on the accumulation and transformation of N-EtFOSA in terrestrial invertebrates and will be helpful to explore the indirect sources of FOSA and PFOS in environmental biota." @default.
- W2803262457 created "2018-06-01" @default.
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- W2803262457 date "2018-10-01" @default.
- W2803262457 modified "2023-10-14" @default.
- W2803262457 title "Uptake, elimination and biotransformation of N-ethyl perfluorooctane sulfonamide (N-EtFOSA) by the earthworms (Eisenia fetida) after in vivo and in vitro exposure" @default.
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- W2803262457 doi "https://doi.org/10.1016/j.envpol.2018.05.046" @default.
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