Department of Environmental Engineering, Yeungnam University, Gyungsan 38541, Republic of Korea.
Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Republic of Korea.
J Environ Sci (China). 2018 May;67:198-205. doi: 10.1016/j.jes.2017.08.020. Epub 2017 Sep 6.
The toxic effects of the composites of Fe and Cu with different percentages of CNTs were examined based on the activity of bacterial bioluminescence and seed germination. In terms of the EC values, the toxic effects of Cu on bacterial bioluminescence and seed germination were approximately 2 and 180 times greater than that of Fe, respectively. The toxicity increased with increasing CNT content in the Cu-CNT mixtures for both organisms, whereas opposite results were observed with Fe-CNT mixtures. The mean toxic effects of Cu-CNT (6%) were approximately 1.3-1.4 times greater than that of Cu-CNT (0%), whereas the toxic effects of Fe-CNT (6%) were approximately 2.1-2.5 times lower than that of Fe-CNT (0%) for both the bioluminescence activity and seed germination. The causes of this phenomenon are unclear at this point. More research will be needed to elucidate the mechanism of the toxicity of nano-mixture materials and the causes of the different patterns of toxicity with Cu- and Fe-CNT mixtures.
基于细菌生物发光和种子发芽活性，研究了不同比例 CNTs 的 Fe 和 Cu 复合材料的毒性效应。就 EC 值而言，Cu 对细菌生物发光和种子发芽的毒性分别约为 Fe 的 2 倍和 180 倍。对于这两种生物，随着 Cu-CNT 混合物中 CNT 含量的增加，毒性也随之增加，而在 Fe-CNT 混合物中则观察到相反的结果。Cu-CNT（6%）的平均毒性效应约为 Cu-CNT（0%）的 1.3-1.4 倍，而 Fe-CNT（6%）的毒性效应约为 Fe-CNT（0%）的 2.1-2.5 倍，这两种情况均为生物发光活性和种子发芽。目前尚不清楚造成这种现象的原因。需要进一步研究来阐明纳米混合物材料毒性的机制以及 Cu 和 Fe-CNT 混合物毒性模式不同的原因。
