Toxicity of TiO2 nanoparticles to cladocerans, algae, rotifers and plants - Effects of size and crystalline structure
Toxicity of TiO2 nanoparticles to cladocerans, algae, rotifers and plants - Effects of size and crystalline structure
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DOI：
10.1016/j.chemosphere.2012.09.013
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发表时间：
2013-01-01
期刊：
影响因子：
8.8
通讯作者：
Marmier, Nicolas
中科院分区：
文献类型：
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作者：
Clement, Laura;Hurel, Charlotte;Marmier, Nicolas
随着纳米技术的快速发展，人类和环境暴露于纳米技术材料的风险越来越大。然而，关于纳米颗粒潜在环境影响的数据很少。本研究的目的是评估二氧化钛的粒度和晶体结构（金红石和金红石）对其毒性的影响。因此，急性和慢性毒性试验包括使用水蚤和藻类、轮虫和植物作为模式生物的改良急性试验（72小时）。毒性梯度因受试生物而异。我们的研究结果表明，在整个测试中进行的晶体结构的TiO 2纳米颗粒是有毒的。然而，在高浓度下，通过其抗菌特性，它们显着促进根的生长。金红石型TiO2纳米粒子具有亲油性，在水介质中形成较大的聚集体，对生物体的毒性较低，因此其毒性低于金红石型TiO2纳米粒子。(C)2012爱思唯尔有限公司保留所有权利。
With the rapid development of nanotechnology, there is an increasing risk of human and environmental exposure to nanotechnology-based materials. However, the data on the potential environmental effects of nanoparticles are scarce. The aim of this study is to assess the effect of particle size and crystal structure (anatase and rutile) of titanium dioxide on their toxicity. Thus, acute and chronic toxicity tests included a modified acute test (72 h) using daphnies and algae, rotifers and plants as model organisms. Gradient of toxicity varied with the tested biological organisms. Our results revealed that TiO2 nanopartides in anatase crystal structure are toxic in the entire set of tests conducted. However, at high concentration, through their antimicrobial properties, they significantly promoted growth of roots. Because of its lipophilicity, the rutile crystalline structure of TiO2 NPs form larger aggregates in aqueous medium; then they have less effect on biological organisms, and thus a lower toxicity than the anatase crystalline form of TiO2.We also demonstrated that exposure duration, aggregation and concentrations are contributing factors in nanoparticles-mediated toxicity. (C) 2012 Elsevier Ltd. All rights reserved.