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Characterizing toluene adsorption onto carbon nanotubes for environmental applications

机译：表征甲苯吸附在碳纳米管上的环境应用

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Two different types of carbon nanotubes (CNTs), multi-walled and single-walled carbon nanotubes (MWCNTs and SWCNTs, respectively), have been characterized as new potential sorbents for contaminant removal from aqueous phase and can be used through different technological implementations. The performance of the materials has been evaluated in comparison with the most commonly used carbonaceous material, activated carbon (AC). Adsorption properties were evaluated by kinetic and equilibrium batch tests in aqueous solution at different salinity levels. Toluene was chosen as the reference compound to simulate the water phase dissolved portion of an oil spill. The experimental results have clearly demonstrated faster motion and higher adsorption capacity of MWCNTs and SWCNTs compared with AC. CNTs have shown very high removal efficiency for dissolved toluene, up to 30% and 90% for MWCNTs and SWCNTs, respectively. These results are very promising for the prospective use of CNTs as a potential alternative sorbent for hydrophobic organic compound (HOC) removal in environmental applications.
机译：两种不同类型的碳纳米管（CNT），分别是多壁碳纳米管和单壁碳纳米管（分别为MWCNT和SWCNT），已被表征为用于从水相中去除污染物的新型潜在吸附剂，可以通过不同的技术实现方式使用。与最常用的碳质材料活性炭（AC）相比，已评估了材料的性能。通过动力学和平衡间歇试验在不同盐度水平下的水溶液中评价吸附性能。选择甲苯作为参考化合物，以模拟溢油的水相溶解部分。实验结果清楚地表明，与AC相比，MWCNT和SWCNT的运动更快，吸附能力更高。 CNT对溶解的甲苯显示出非常高的去除效率，MWCNT和SWCNT分别达到30％和90％。这些结果对于将CNTs用作环境应用中疏水性有机化合物（HOC）去除的潜在替代吸附剂非常有希望。

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