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首页> 外文期刊>Environmental Pollution >Aqueous Suspensions Of Carbon Nanotubes: Surface Oxidation, Colloidal Stability And Uranium Sorption
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Aqueous Suspensions Of Carbon Nanotubes: Surface Oxidation, Colloidal Stability And Uranium Sorption

机译：碳纳米管的水悬浮液：表面氧化，胶体稳定性和铀吸附

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The objective of this study is to obtain information on the behaviour of carbon nanotubes (CNTs) as potential carriers of pollutants in the case of accidental CNT release to the environment and on the properties of CNTs as a potential adsorbent material in water purification. The effects of acid treatment of CNTs on (ⅰ) the surface properties, (ⅱ) the colloidal stability and (ⅲ) heavy metal sorption are investigated, the latter being exemplified by uranium(VI) sorption. There is a pronounced influence of surface treatment on the behaviour of the CNTs in aqueous suspension. Results showed that acid treatment increases the amount of acidic surface groups on the CNTs. Therefore, acid treatment has an increasing effect on the colloidal stability of the CNTs and on their adsorption capacity for U(VI). Another way to stabilise colloids of pristine CNTs in aqueous suspension is the addition of humic acid.
机译：这项研究的目的是获得有关碳纳米管（CNTs）在意外CNT释放到环境中时作为污染物潜在载体的行为的信息，以及有关CNTs在水净化中作为潜在吸附材料的特性的信息。研究了碳纳米管的酸处理对（ⅰ）表面性能，（ⅱ）胶体稳定性和（ⅲ）重金属吸附的影响，后者以铀（VI）吸附为例。表面处理对水性悬浮液中CNT的行为有显着影响。结果表明，酸处理增加了CNT上酸性表面基团的数量。因此，酸处理对碳纳米管的胶体稳定性及其对U（VI）的吸附能力的影响越来越大。稳定水性悬浮液中原始CNT胶体的另一种方法是添加腐殖酸。

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