ZnO Nanoparticles: Effect of Size on Bacterial Bioluminescence, Seed Germination, Algal Growth, and Gene Mutation

被引:7
作者
Kong, In Chul [1 ]
Raliya, Ramesh [2 ]
Ko, Kyung-Seok [3 ]
Biswas, Pratim [2 ]
机构
[1] Yeungman Univ, Dept Environm Engn, Kyungbuk, South Korea
[2] Washington Univ, Dept Energy Environm & Chem Engn, Campus Box 1180, St Louis, MO 63130 USA
[3] Korea Inst Geosci & Mineral Resources, Geol Environm Div, Daejeon, South Korea
关键词
environment; nano-bio-interaction; toxicity; ZnO nanoparticles; ZINC-OXIDE NANOPARTICLES; SILVER NANOPARTICLES; TITANIUM-DIOXIDE; OXIDATIVE STRESS; DAPHNIA-MAGNA; BULK ZNO; TOXICITY; NANOMATERIALS; MUTAGENICITY; TIO2;
D O I
10.1089/ees.2017.0206
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Effect of zinc oxide (ZnO) nanoparticles (NPs) size was evaluated in the context of bacterial bioluminescence, seed germination, gene mutation in bacteria, and algal growth. Different sensitivities and half maximal effective concentration (EC50s) were observed, showing orders of toxicity: bacterial bioluminescence (0.31-0.40mg/L)>algal growth (1.08-2.90mg/L)>seed germination (6.56-9.98mg/L). Furthermore, size of NPs plays a critical role in toxicity. The mutation ratio decreases with increase in the size of NPs, with 2.4 for 5nm and 1.1 for 80nm, at 100mg/L of ZnO NPs. Effect ZnO particle size differed according to tested assays. Under exposure conditions with large sizes, toxicity of ZnO NPs increased on seed germination, but decreased on algal growth and gene mutation. Toxicity results of algal growth and seed germination showed statistically significant differences (p<0.05) between 5 and 80nm ZnO NPs. In the case of bacterial bioluminescence, no significant differences were observed among each of the sizes tested. These findings show that a toxicity evaluation of NPs needs to consider the different effects with respect to particle sizes and tested organisms for an accurate assessment of toxicity.
引用
收藏
页码:231 / 239
页数:9
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