Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian, 116026, PR China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, PR China.
National Marine Environmental Monitoring Center, China, 42 Linghe Road, Dalian, 116023, PR China.
Mar Pollut Bull. 2019 Dec;149:110532. doi: 10.1016/j.marpolbul.2019.110532. Epub 2019 Sep 4.
This study considered the stability of nickel oxide nanoparticles (nNiO) in seawater including their ability of aggregation and ion release. Furthermore, the relationship between these properties and their toxicity on marine algae Chlorella vulgaris was investigated. The results showed nNiO inhibited the growth of algal cells and decreased their chlorophyll content, which was due to the shading effects by aggregation of nNiO in seawater. Moreover, the release of Ni depended on concentration of the nNiO solution. About 1.63% Ni (varied from 0.89 to 3.63%) was detected and it may mediate the generation of ROS under both visible light and ultraviolet (UV) irradiation, which resulted in oxidative stress in algae. Therefore, the stability of nNiO in water affected its toxicity, which should be considered when assessing the nano-pollution risks in aquatic ecosystem.
本研究考察了纳米氧化镍（nNiO）在海水中的稳定性，包括其聚集和离子释放的能力。此外，还研究了这些性质与其对海洋藻类小球藻的毒性之间的关系。结果表明，nNiO 抑制了藻类细胞的生长并降低了其叶绿素含量，这是由于 nNiO 在海水中聚集产生的遮光效应。此外，Ni 的释放取决于 nNiO 溶液的浓度。检测到约 1.63%的 Ni（范围为 0.89 至 3.63%），它可能在可见光和紫外线（UV）照射下介导 ROS 的生成，从而导致藻类的氧化应激。因此，nNiO 在水中的稳定性影响其毒性，在评估水生生态系统中的纳米污染风险时应予以考虑。
