Roberts Aaron P, Mount Andrew S, Seda Brandon, Souther Justin, Qiao Rui, Lin Sijie, Ke Pu Chun, Rao Apparao M, Klaine Stephen J
Department of Biological Sciences, University of North Texas, Denton, Texas 76203, USA.
Environ Sci Technol. 2007 Apr 15;41(8):3025-9. doi: 10.1021/es062572a.
This study examined the interactions between Daphnia magna and a water-soluble, lysophophatidylcholine coated single-walled carbon nanotube. D. magna were able to ingest the nanotubes through normal feeding behavior and utilize the lysophophatidylcholine coating as a food source. D. magna were able to modify the solubility of the nanotube, likely through digestion of the lipid coating. This study provides evidence of biomodification of a carbon-based nanomaterial by an aquatic organism. The modification significantly altered the physical properties of the nanomaterial in freshwater. Acute toxicity was observed only in the highest test concentrations. These are important findings related to determining the behavior and potential toxicity of coated nanomaterials released into the environment.
本研究考察了大型溞与一种水溶性、溶血磷脂酰胆碱包覆的单壁碳纳米管之间的相互作用。大型溞能够通过正常摄食行为摄取纳米管，并将溶血磷脂酰胆碱包覆层作为食物来源加以利用。大型溞可能通过消化脂质包覆层来改变纳米管的溶解度。本研究提供了水生生物对碳基纳米材料进行生物改性的证据。这种改性显著改变了纳米材料在淡水中的物理性质。仅在最高测试浓度下观察到急性毒性。这些是与确定释放到环境中的包覆纳米材料的行为和潜在毒性相关的重要发现。
