盐度对嗜盐微藻杜氏盐藻中银纳米颗粒（AgNPs）和硝酸银（AgNO）毒性的影响。
Influence of salinity on the toxicity of silver nanoparticles (AgNPs) and silver nitrate (AgNO) in halophilic microalgae, Dunaliella salina.
机构信息
Department of Fisheries, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran.
Department of Fisheries, Faculty of Natural Resources and Environment, Ferdowsi University of Mashhad, Mashhad, Iran.
出版信息
Chemosphere. 2018 Oct;209:156-162. doi: 10.1016/j.chemosphere.2018.06.098. Epub 2018 Jun 13.
This study aim to evaluate the potential toxic effects of citrate coated silver nanoparticles (AgNPs) and ionic silver (AgNO) on marine microalgae Dunaliella salina under three different salinities (35, 70, and 140 g/L). The toxicity was investigated according to modified OECD guideline (No. 201) by 72 h exposure of microalgae to various concentrations of each of the chemicals in Walne's saline media. According to the results, the growth inhibitory effects of AgNPs and AgNO increased significantly coincidence with increasing time and concentration compared to control (P < 0.05). The values of median inhibitory concentrations (IC) of AgNPs and AgNO based on average specific growth rate and yield for D. salina increased significantly with elevation of water salinity from 35 to 140 g/L (P < 0.05). Toxicity of AgNO based on IC to D. salina was significantly higher than AgNPs at all salinities (P < 0.05). In conclusion, both AgNPs and AgNO inhibited the growth of D. salina at different saltwater medium.
本研究旨在评估柠檬酸包覆的银纳米粒子（AgNPs）和离子银（AgNO）在三种不同盐度（35、70 和 140g/L）下对海洋微藻杜氏盐藻的潜在毒性作用。根据 OECD 指南（第 201 号）的修改版，通过在 Walne 盐度培养基中暴露于不同浓度的每种化学物质 72 小时来研究毒性。结果表明，与对照组相比（P<0.05），AgNPs 和 AgNO 的生长抑制作用随时间和浓度的增加而显著增加。基于平均比增长率和产量的 AgNPs 和 AgNO 的中值抑制浓度（IC）随着盐度从 35 升高到 140g/L 而显著升高（P<0.05）。基于 IC 对 D. salina 的 AgNO 的毒性在所有盐度下均显著高于 AgNPs（P<0.05）。总之，AgNPs 和 AgNO 在不同盐度的海水培养基中均抑制了 D. salina 的生长。
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