柴油和燃料油对小球藻的急性毒性试验研究

Study on acute toxicity of three fuel oils to marine Chlorella

测定了0#柴油、0#船用柴油和船用重质燃料油在不同时间对海产小球藻的急性毒性效应,发现在低浓度时对小球藻有刺激作用,在高浓度时能抑制小球藻的生长。本文通过机率单位法对数据进行处理得出三种油品对小球藻的毒性顺序为0#柴油大于03船用柴油大于船用重质燃料油。研究还发现在24-144 h之间三种油品对小球藻的抑制率(EC50值)随时间变化呈规律性变化。

Lethal toxicity of No.0 fuel oil and No.0 fuel oil from a cargoboat and heavy fuel oil to marine chlorella was measured. The results show that the three oils inhibited the growth in high concentration, but in low concentration stimulated the growth. Based on the test results, the toxicity of oils is in order of No.0 fuel oil 〉 No.0 fuel oil from the cargoboat 〉 heavy fuel oil. The result of study also shows that the EC50 changes regularly from 24h to 144h.