金属对大型溞和颤蚓的毒性。
Toxicity of metals on Daphnia magna and Tubifex tubifex.
作者信息
Fargasová A
机构信息
Slovak Technical University, Faculty of Chemical Technology, Department of Environmental Sciences, Bratislava, Slovakia.
出版信息
Ecotoxicol Environ Saf. 1994 Mar;27(2):210-3. doi: 10.1006/eesa.1994.1017.
The toxicity of Hg2+ [HgCl2], Cr6+(1) [(NH4)2CrO4], Cr6+(2) [CrO3], Cd2+ [CdCl2.2,5H2O], Pb2+ [Pb(CH3COO)2.3H2O], and As5+ [Na2HAsO4.7H2O] on the sensitivity and survival of Daphnia magna and Tubifex tubifex has been studied. All test metals were dissolved and determined under standardized conditions (dilution water, Bringmann and Kühn, 1982) and 96 hr LC50 for T. tubifex and 48 hr LC50 for D. magna were compared in rank orders toxicity. For D. magna rank order toxicity was Hg2+ > Cr6+(2) > Cd2+ = Cr6+(1) > Pb2+ > As5+ and for T. tubifex it was Hg2+ > Cd2+ > Cr6+(2) > Cr6(1) > Pb2+ > As5+. D. magna was a more sensitive organism than T. tubifex and its LC50 values for all metals were several times lower than LC50 values for T. tubifex. Correlation between toxicity of various metals and biological subjects may be useful in predicting toxicity to various biologically important organisms connected with food chains.
研究了Hg2+[HgCl2]、Cr6+(1)[(NH4)2CrO4]、Cr6+(2)[CrO3]、Cd2+[CdCl2·2,5H2O]、Pb2+[Pb(CH3COO)2·3H2O]和As5+[Na2HAsO4·7H2O]对大型溞和颤蚓的敏感性及存活的影响。所有测试金属均在标准化条件下（稀释水，Bringmann和Kühn，1982）溶解并测定，比较了颤蚓的96小时半数致死浓度（LC50）和大型溞的48小时半数致死浓度（LC50）的毒性等级顺序。对于大型溞，毒性等级顺序为Hg2+>Cr6+(2)>Cd2+=Cr6+(1)>Pb2+>As5+；对于颤蚓，毒性等级顺序为Hg2+>Cd2+>Cr6+(2)>Cr6(1)>Pb2+>As5+。大型溞是比颤蚓更敏感的生物，其对所有金属的LC50值比颤蚓的LC50值低几倍。各种金属的毒性与生物对象之间的相关性可能有助于预测对与食物链相关的各种具有生物学重要性的生物的毒性。
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