1,8-二羟基蒽醌对大型溞的毒性效应

1引言我国是世界上染料及中间体生产、消费和出口大国.随着这些产品的制造和使用,该类物质也多途径地进入环境,污染水体及土壤2].近年来,蒽醌类染料的总染料市场份额不断增加,2004年有望达50%5].与量大面广的偶氮染料相比,人们对蒽醌类污染物的毒性关注较少5].羟基蒽醌类化合物(hAQs)是蒽醌染料和药物中间体10,13],对沙门氏菌有很强的致突变性1];抑制发光菌新陈代谢4];对鲤鱼和绿藻也有显著的毒性14].hAQs也是蒽光解的产物,与蒽相比hAQs的毒性显著增大7].大型(Daphniamagna)是我国北方淡水域常见枝角类浮游动物,其对污染物的毒…

Toxic effects of 1,8-dihydroxyanthraquinone on Daphnia magna

The study on the acute, sublethal and chronic toxicity of 1,8-dihydroxyanthraquinone (1,8-dihAQ) to Daphnia magna showed that the 48 h LC50 was 0.37 mg L(-1), and the feeding behavior of Daphnia magna was severely affected by the compound. When exposed to 0.2 mg x L(-1) of 1,8-dihAQ for 5 h, the filtration and ingestion rate of Daphnia magna was inhibited by 97%. Chronic toxicity test results indicated that the reproduction ability decreased dramatically after exposing to sublethal concentration of 1, 8-dihAQ. It could be inferred that reproduction parameters and intrinsic rate of natural increase were the sensitive parameters in characterizing sublethal toxicity. The NOEC and LOEC values for reproduction parameters were also given.