Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China.
Environ Pollut. 2018 May;236:454-461. doi: 10.1016/j.envpol.2018.01.081.
Cobalt nanoparticles (CoNPs) are being used in wide range of applications and may enter aquatic environments where they pose a potential threat to aquatic organisms. Algal growth inhibition tests were conducted to explore the potential toxicity of CoNPs on marine microalgae, Platymonas subcordiforus, Chaetoceros curvisetus and Skeletonema costatum. This is one of the first time to explore toxicity of CoNPs on marine algae systematically. The results showed that CoNPs induced toxicity on the three algae. The CoNP toxicity on three species microalgae was partly attributed to the Co released by CoNPs in the f/2 seawater medium. The particle size distribution of CoNPs in seawater revealed that CoNPs were agglomerated in the seawater. The shading effect of CoNPs and scanning electron microscope (SEM) images also showed the aggregating of CoNPs and microalgae, which influenced the photosynthetic utilization and inhibited the growth of the three algae. The order of toxic sensitivity of CoNPs on the three algae was as follows: Platymonas subcordiforus < Chaetoceros curvisetus < Skeletonema costatum.
钴纳米颗粒（CoNPs）被广泛应用于各种领域，可能会进入水生环境，从而对水生生物构成潜在威胁。本研究通过藻类生长抑制试验，探讨了 CoNPs 对海洋微藻（原甲藻、柔弱角毛藻和中肋骨条藻）的潜在毒性。这是首次系统地研究 CoNPs 对海洋藻类的毒性。结果表明，CoNPs 对三种藻类均具有毒性。CoNPs 在 f/2 海水中的毒性部分归因于 CoNPs 释放出的 Co。海水中 CoNPs 的粒径分布表明 CoNPs 在海水中发生了团聚。遮蔽效应和扫描电子显微镜（SEM）图像也表明了 CoNPs 与微藻的聚集，这影响了三种藻类的光合作用利用并抑制了它们的生长。CoNPs 对三种藻类的毒性敏感顺序为：原甲藻<柔弱角毛藻<中肋骨条藻。
