Acute toxicity effects and bioaccumulation characteristics of No.0 diesel dispersion and diesel emulsion on Chlamys Farreri

In this paper, the Chlamys farreri was exposed in No.0 diesel dispersion and emulsion to study the characteristic of its acute toxic and accumulation and elimination effects using the semi-static bioassay.The results show that:(1) The 96 h-LC₅₀ of No.0 diesel dispersion and emulsion are 2.68 mg/L and 1.74 mg/L, diesel dispersion and emulsion are both high toxic substances, and diesel oil shows more toxic when mixed with dispersant; (2) Steady-state bioaccumulation factor BCF₁ (404.6~91.75 mg/L)and kinetic bioaccumulation factor BCF₂(1973.80~327.06 mL/g) and kinetic uptake rate constant ku(8.89~0.71 mL/(g·h)) in diesel emulsion are greater than that in the same concentration of diesel dispersion, but there was no significant relationship between the elimination rate constant and concentration in ambient seawater.Results indicated that Chlamys farreri has greater enrichment ability and rate in diesel emulsion.