Uptake and Elimination of 4-Nonylphenol in the Enchytraeid Enchytraeus albidus

作者：Patricio Silva A L; Amorim M J B; Holmstrup M^*

来源：Bulletin of Environmental Contamination and Toxicology, 2016, 96(2): 156-161.

DOI：10.1007/s00128-015-1701-7

• Terrestrial enchytraeids
• Surfactant
• Bioaccumulation
• Toxicokinetics

We determined the uptake and elimination kinetics of 4-nonylphenol (4-NP) in Enchytraeus albidus. A relatively fast degradation of 4-NP in test soil occurred at 20A degrees C (lambda = 0.11 day(-1)). The concentration of 4-NP in worm tissue followed a three-phase kinetics model, with a short phase of fast 4-NP accumulation shortly after exposure start (k (u) = 0.97 mg kg(-1) day(-1)), followed by partial elimination (K (e1) = 1.47 day(-1)) until reaching the equilibrium phase (A = 44.7 mg kg(-1) fresh tissue), and finally the elimination upon transfer to uncontaminated soil (K (e2) = 0.67 day(-1)). During uptake, the internal concentration was similar to the concentration found in the soil, with a BAF similar to 1. In un-spiked soil, elimination took place within the first 24 h (elimination t(1/2) similar to 1 day).

• 出版日期2016-2