五种重金属离子对俄罗斯卤虫的联合毒性研究

Studies on Joint Toxicity of Five Heavy Metal Ions to Artemia

研究Hg2+、Pb2+、Cu2+、Mn2+和Cd2+5种重金属离子对俄罗斯卤虫的急性毒性效应.对卤虫无节幼体的24 h,48 h和72 h实验结果以及卤虫成体的24 h实验结果分别进行分析,得到回归方程.选用的5种重金属离子对俄罗斯卤虫的死亡均表现出直接或者联合的影响,联合作用包括金属离子间的协同或者拮抗作用;不同发育阶段卤虫对重金属离子的耐受情况不同,金属离子间的相互作用也有差异.不同发育阶段的卤虫对5种重金属离子的耐受性不同,在研究毒性作用或建立环境监测的数学模型时,必须注意卤虫的发育时期.对回归方程的验证实验表明,所得方程基本能够反映重金属离子对卤虫的毒性作用,但是有些仅死亡率分布趋势相似,结果仍有差异.

Acute toxicity effects of five heavy metal ions, Hg^2＋, Pb^2＋, Cu^2＋, Mn^2＋ and Cd^2＋, on Artemia of Russia were studied. The stepwise regression equations of nauplii（24 h, 48 h and 72 h） and adult（24 h） acute toxicity experiments were obtained. These five heavy metal ions have joint toxicity to Artemia of Russia, and the joint toxicities vary in different development stages of Artemia. Those results show that Arternia has different tolerances for the five heavy metal ions when it is in different growth period, and the interaction of heavy metal ions varied with growth period. Therefore the growth period of drtemia must be paid attention to when the toxicity is studied or when the mathematic model for environmental monitoring is built. The validating experiments indicate that those regressive equations are capable of reflecting the toxicity of heavy metal ions to the Artemia, though some results are difference except similar distributing trend.