Laboratory assessment of the mobility of nanomaterials in porous media
Laboratory assessment of the mobility of nanomaterials in porous media
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DOI：
10.1021/es0352303
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发表时间：
2004-10-01
影响因子：
11.4
通讯作者：
Wiesner, MR
中科院分区：
文献类型：
--
作者：
Lecoanet, HF;Bottero, JY;Wiesner, MR
大量工程纳米材料的生产将不可避免地导致这些材料进入环境。在一个明确的多孔介质中的流动性进行了评估，为八个颗粒产品的纳米化学，以评估其在多孔介质，如地下水含水层和水处理厂过滤器迁移的潜力。与纳米材料存在整体环境风险的断言相反，在这里，我们表明这些纳米材料表现出广泛不同的传输行为。已被功能化以促进在水中分散的富勒烯基纳米材料显示出最高的迁移率，计算出在未破裂的砂质含水层中迁移约10米的潜力。C-60的胶体聚集体一直是最近毒性研究的焦点，是所评估的纳米材料中移动的最少的。
The production of significant quantities of engineered nanomaterials will inevitably result in the introduction of these materials to the environment. Mobility in a well-defined porous medium was evaluated for eight particulate products of nanochemistry to assess their potential for migration in porous media such as groundwater aquifers and water treatment plant filters. Contrary to the assertion that nanomaterials present monolithic environmental risks, here we show that these nanomaterials exhibit widely differing transport behaviors. Fullerene-based nanomaterials that had been functionalized to facilitate dispersal in water displayed the highest mobilities, with a calculated potential to migrate approximately 10 m in unfractured sand aquifers. Colloidal aggregates of C-60, which have been the focus of recent toxicity studies, were among the least mobile of the nanomaterials evaluated.