Evaluation of PAHs Bioavailability in Soils with Triolein Embedded Cellulose Acetate Membranes
利用三油酸甘油酯-醋酸纤维素复合膜评价土壤中多环芳烃的生物可利用性

A new type of passive sample device, triolein embedded cellulose acetate membrane (TECAM), was exposed to biomimetically accumulate the polyaromatic hydrocarbons (PAHs) naphthalene, phenanthrene, pyrene and benz a] pyrene from 10 spiked soils. The accumulation of PAHs by TECAMs and earthworms (Eisenia foetida) was compared in order to evaluate the bioavailability of PAHs in soils. All the four PAHs almost reached equilibrium accumulation in TECAMs within 48h, which was much quicker than the time of 21d for the earthworms. The quantities of the PAHs accumulated by the TECAMs and the earthworm were both positively and linearly related to their concentrations in soils. PAHs accumulation by the TECAM was positively related to dissolved organic carbon (DOC) and negatively related to content of total organic matter (TOM) in soils, but soil pH had little influence on the accumulation of PAHs by the TECAMs. A good linear relationship was observed between TECAM-accumulated PAHs and PAHs accumulation by earthworms, which indicates that TECAM devices may have potential use as a surrogate to predict the bioavailability of PAHs in soils.