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不同亲疏水性质纳米氧化铝存在下铜对斜生栅藻毒性效应的研究
Effect of Different Surface Properties of Nano-Al2O3 on the Toxicity of Copper Towards Scenedesmus Obliquus
投稿时间:2018-05-16  修订日期:2018-09-21
DOI:10.19316/j.issn.1002-6002.2019.03.17
中文关键词:  纳米氧化铝    表面性质  斜生栅藻  毒性
英文关键词:nano-Al2O3  copper  surface properties  Scenedesmus obliquus  toxicity
基金项目:国家自然科学基金(51178019)
作者单位
李晓敏 北京航空航天大学, 空间与环境学院, 北京102206 
穆倩 北京航空航天大学, 空间与环境学院, 北京102206 
周苏阳 北京航空航天大学, 空间与环境学院, 北京102206 
范文宏 北京航空航天大学, 空间与环境学院, 北京102206
北京航空航天大学, 医工交叉北京市高精尖创新中心, 北京 100191 
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中文摘要:
      纳米氧化铝是应用非常广泛的一类人工纳米材料。当它被释放到水环境中后,会与环境中原有的重金属发生相互作用并对其毒性产生影响。文章研究了不同亲疏水性质的纳米氧化铝存在下铜对斜生栅藻的毒性效应,测定了藻细胞的生长抑制、金属积累及超氧化物歧化酶、谷胱甘肽、丙二醛等生化指标的变化。结果表明,纳米氧化铝显著降低了铜离子对藻细胞的生长抑制,藻细胞内铜的积累量及氧化损伤降低。但不同亲疏水性质的纳米氧化铝之间并不存在显著差别。这可能是由于纳米氧化铝对水中的铜离子发生了吸附,间接降低了藻液中的不稳态铜的浓度,从而减轻了铜对藻细胞的毒害。而纳米氧化铝的不同亲疏水性质对吸附水中铜离子的能力没有显著的影响。
英文摘要:
      Nano-Al2O3 is a widely used artificial nanomaterial. When it is released into the aquatic environment, it would interact with the original water pollutants, especially the heavy metals, and may produce an impact on the toxicity effects of the metals. In current study, the copper toxicity in the presence of nano-Al2O3 with different surface properties (hydrophilicity and hydrophobicity) towards Scenedesmus obliquus was investigated. The growth inhibition, accumulated copper in Scenedesmus obliquus, as well as superoxide dismutase activity and concentration of glutathione and malondialdehyde in cells were determined. Results showed that the presence of nano-Al2O3 reduced the growth inhibition of Scenedesmus obliquus. The accumulation of copper and the level of oxidative stress in algae were also reduced in the presence of nano-Al2O3. Different surface properties of nano-Al2O3 showed no significant different effect on the toxicity of copper to Scenedesmus obliquus. The decreased toxicity could be attributed to the adsorption of copper onto Al2O3 nanoparticles and the subsequent decrease of labile copper concentration in water.
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