石油烃分散液对马粪海胆浮游幼虫的急性毒性效应

Acute toxic effects of petroleum hydrocarbon water-accommodated fractions on larvae development of Hemicentrotus pulcherrimus

为研究石油烃污染对海胆胚胎的急性毒性效应,采用胚胎发育毒性实验方法,分6个质量浓度组(1.0、2.0、4.0、8.0、16.0、32.0 mg/L)分别进行0#柴油和船用燃料油分散液对马粪海胆浮游幼虫发育的急性毒性实验.结果显示,两种油品分散液对胚胎发育至二腕幼虫和四腕幼虫阶段有明显的毒性作用.随着受试液质量浓度的增加,幼虫的体长变短,畸形率及死亡率显著增大.船用燃料油分散液48 h和72h的半数效应浓度(EC50)分别为4.57、2.71 mg/L;0#柴油分散液48 h和72 h的EC50分别为3.39、1.87 mg/L,故0#柴油的毒性大于船用燃料油.

The embryonic development technique was adopted to study acute toxic effects of petroleum hydrocarbon pollutants such as No, 0 diesel oil and marine heavy fuel oil water-accommodated fractions on embryos and larvae development of sea urchin Hemicentrotus pulcherrimus. The experiments were carried out with six concentrations（ 1.0,2.0,4.0,8.0,16.0,32.0 mg/ L）. The results indicate that the two kinds of oil dispersions have high toxicities on two and four arm larvae. Compared with the control group, the larvae in the oil groups shows shorter body length and higher deformity and mortality rate. The 48 h, 72 h EC50 of marine heavy fuel oil is 4.57,2.71 mg/L respectively, while the No. 0 diesel oil is 3.39,1.87 mg/L respectively. Toxicity of No. 0 diesel oil is higher than that of marine heavy fuel oil.