纳米TiO2对小球藻和新月菱形藻的毒性研究  

Toxicity of TiO_2 Nanoparticles to Chlorella sp. and Nitzschia closterium

作　　者：孙羿[1] 王华[1] 吕丰訸[1] 于春艳[2] 刘恒明[3] 

机构地区：[1]大连海洋大学水产与生命学院 辽宁省贝类良种繁育工程技术研究中心,辽宁大连116023 [2]国家海洋环境监测中心 [3]大连海洋大学海洋科技与环境学院

出　　处：《现代农业科技》2016年第1期217-219,223,共4页Modern Agricultural Science and Technology

基　　金：辽宁省自然科学基金(2014020149)

摘　　要：研究了纳米Ti O2对小球藻(Chlorella sp.)和新月菱形藻(Nitzschia closterium)的毒性。15 d的试验结果表明,纳米Ti O2对2种微藻的毒性均随着纳米Ti O2浓度的增加而增强。但是,纳米Ti O2对2种微藻生长的抑制作用呈现一定差异性,当水中纳米Ti O2浓度低于9.0mg/L时,纳米Ti O2对小球藻生长产生的抑制作用强于新月菱形藻;当水中纳米Ti O2浓度高于12.0 mg/L时,纳米Ti O2对小球藻和新月菱形藻生长产生的抑制作用相近,生长相对抑制率均为40%左右。利用扫描电子显微镜观察了纳米Ti O2对小球藻藻细胞个体形态的影响,发现纳米Ti O2可以导致小球藻表面出现塌陷。The toxicity of titanium dioxide（TiO2）nanoparticles for Chlorella sp. and Nitzschia closterium was investigated. The results indicated that the toxicity of TiO2 nanoparticles was increased with the TiO2 nanoparticle concentration increasing. Under the same experimental conditions, these two species of microalgae showed different expressions within the same culture duration. When the concentration of TiO2 was lower than 9.0 mg/L, the inhibiting effect for Chlorella sp. was higher than that of Nitzschia closterium.When the concentration of TiO2 was higher than 12.0 mg/L,the inhibiting effect for both Chlorella sp. and Nitzschia closterium were the same, and the inhibiting effect reached about 40%. It could be found from the scanning electron microscopy image that the surface structure of ChloreUa sp. shrinked under the treatment of high TiO2 nanoparticle concentration.

关 键 词：纳米TIO2 小球藻 新月菱形藻 毒性 

分 类 号：X52[环境科学与工程—环境工程]