Ecotoxicity of Alternatives of PFOS on Bombyx mori (Strain Dazao)
全氟辛烷磺酸盐(PFOS)替代品对家蚕大造的生态毒性

Bombyx mori (Strain Dazao) was exposed to four alternatives of PFOS to test the toxic effects of these chemicals. Bombyx mori (Strain Dazao) was maintained in our laboratory as experimental animal and was fed with forage under laboratory conditions. Methods evaluating toxicity of chemicals to Bombyx mori (Strain Dazao) were built. Bombyx mori didn't appear obvious death until the acute feeding concentration was up to 2 000 mg·L-1, and contacting concentration was up to 10 g·L-1. Both the contact and the acute oral toxicity results suggested that the four tested chemicals had low toxicity to Bombyx mori. Low concentration of surfactant would have serious negative effect on the cocooning rate of Bombyx mori which decreased to 0 at 0.4 g·kg-1 of surfactant. The other three chemicals influenced on the pupal rate at 0.004 g·kg-1, while the inhibitory effects were smaller than that of the surfactant. All these chemicals influenced on the cocoon layer ratio. The cocoon layer ratio fell sharply at 0.04 g·kg-1 of surfactant, while the influences of other three chemicals on cocoon layer ratio were smaller than that of the surfactant. The surfactant also significantly influenced the hatching rate of Bombyx mori in the chronic feeding experiment. The hatching rate would decrease to 0 at 0.04 g·kg-1 of surfactant while other three chemicals had little influence on the hatching rate.