羟基官能化多壁碳纳米管和pH值对铅对大型溞毒性的影响。
The influence of hydroxyl-functionalized multi-walled carbon nanotubes and pH levels on the toxicity of lead to Daphnia magna.
作者信息
Qin Li, Huang Qingguo, Wei Zhongbo, Wang Liansheng, Wang Zunyao
机构信息
State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China.
College of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223, United States.
出版信息
Environ Toxicol Pharmacol. 2014 Jul;38(1):199-204. doi: 10.1016/j.etap.2014.05.016. Epub 2014 Jun 8.
The acute toxicity of lead was examined for Daphnia magna in waters with different pH values (5.0, 6.0, 7.0, 8.0 and 9.0) and different concentrations (0.01, 0.10, 0.50 and 1.00 mg/L) of hydroxyl-functionalized multi-walled carbon nanotubes (OH-MWCNTs). The results indicated that pH values could affect the toxicity of lead. With pH values increasing from 5.0 to 9.0, the 24h-LC₅₀ of Pb(II) increased from 0.784 to 9.473 mg/L, suggesting that the toxicity of Pb(II) was dramatically decreased. Although OH-MWCNTs almost caused no lethal effect to D. magna at the studied four concentrations, the combination of OH-MWCNTs and Pb(II) could cause more serious toxic effects to D. magna than Pb(II) alone. This study indicated that the synergistic effect caused by CNTs and lead could not be neglected.
研究了在不同pH值（5.0、6.0、7.0、8.0和9.0）以及不同浓度（0.01、0.10、0.50和1.00 mg/L）的羟基功能化多壁碳纳米管（OH-MWCNTs）水体中，铅对大型溞的急性毒性。结果表明，pH值会影响铅的毒性。随着pH值从5.0增加到9.0，Pb(II)的24小时半数致死浓度（LC₅₀）从0.784增加到9.473 mg/L，这表明Pb(II)的毒性显著降低。尽管在所研究的四个浓度下，OH-MWCNTs对大型溞几乎没有致死作用，但OH-MWCNTs与Pb(II)的组合对大型溞造成的毒性效应比单独的Pb(II)更严重。该研究表明，碳纳米管与铅之间的协同效应不可忽视。
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