The effects of Nereis diversicolor bioturbation on the remobilization and bioavailability of polycyclic aromatic hydrocarbons from estuarine sediment were determined after 60 d in a laboratory experiment. The release fluxes and mass transfer coefficients showed that bioturbation by N. diversicolor can lead to a significant remobilization of polycyclic aromatic hydrocarbons (PAHs) from estuarine sediments. Bioturbation enhanced the release of PAHs from sediment to water by accelerating the transport of sediment particles to the sediment-water interface followed by PAHs desorption to the water. The bioavailability of PAHs was described by SPMD-sediment accumulation factors (SSAF). The SSAF of low molecular weight PAHs with bioturbation was significantly higher than that of PAHs without bioturbation, and there were no significant variations in high-molecular-weight PAHs. Our results revealed that N. diversicolor bioturbation significantly increased PAH release from sediment to water but only increased the bioavailability of low-molecular-weight PAHs.

在实验室实验中，在60天后确定了Nereis diversicolor生物扰动对河口沉积物中多环芳烃迁移和生物利用度的影响。释放通量和传质系数表明，生物扰动由杂色猪笼草引起。会导致河口沉积物中的多环芳烃（PAH）大量迁移。生物扰动通过加速沉积物颗粒向沉积物-水界面的传输，随后PAHs解吸到水中来增强PAHs从沉积物向水中的释放。PAHs的生物利用度由SPMD沉积物累积因子（SSAF）描述。具有生物扰动的低分子量PAH的SSAF明显高于没有生物扰动的PAH，并且高分子量PAH没有明显变化。我们的结果表明，N。diversicolor生物扰动显着增加了PAH从沉积物向水中的释放，但仅增加了低分子量PAHs的生物利用度。