Kayvani Fard Ahmad, Mckay Gordon, Manawi Yehia, Malaibari Zuhair, Hussien Muataz A
Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, PO Box 5825, Doha, Qatar; College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, PO Box 5825, Doha, Qatar.
College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, PO Box 5825, Doha, Qatar.
Chemosphere. 2016 Dec;164:142-155. doi: 10.1016/j.chemosphere.2016.08.099. Epub 2016 Aug 30.
Oil removal from water is a highly important area due to the large production rate of emulsified oil in water, which is considered one of the major pollutants, having a negative effect on human health, environment and wildlife. In this study, we have reported the application of high quality carbon nanotube bundles produced by an injected vertical chemical vapor deposition (IV-CVD) reactor for oil removal. High quality, bundles, super hydrophobic, and high aspect ratio carbon nanotubes were produced. The average diameters of the produced CNTs ranged from 20 to 50 nm while their lengths ranged from 300 to 500 μm. Two types of CNTs namely, P-CNTs and C-CNTs, (Produced CNTs from the IV-CVD reactor and commercial CNTs) were used for oil removal from water. For the first time, thermogravimetric analysis (TGA) was conducted to measure maximum oil uptake using CNT and it was found that P-CNT can take oil up to 17 times their weight. The effect of adsorbent dosage, contact time, and agitation speed were examined on the oil spill clean-up efficiency using batch sorption experiments. Higher efficiency with almost 97% removal was achieved using P-CNTs compared to 87% removal using C-CNTs.
由于水中乳化油的产量巨大，除油成为一个极其重要的领域。乳化油被视为主要污染物之一，对人类健康、环境和野生动物都有负面影响。在本研究中，我们报道了由注入式垂直化学气相沉积（IV-CVD）反应器生产的高质量碳纳米管束在除油方面的应用。制备出了高质量、呈束状、超疏水且长径比高的碳纳米管。所制备碳纳米管的平均直径在20至50纳米之间，而长度在300至500微米之间。使用了两种类型的碳纳米管，即P-CNTs和C-CNTs（IV-CVD反应器制备的碳纳米管和商业碳纳米管）来进行水除油。首次进行了热重分析（TGA）以测量碳纳米管对油的最大吸附量，发现P-CNT对油的吸附量可达其自身重量的17倍。通过批量吸附实验研究了吸附剂用量、接触时间和搅拌速度对溢油清理效率的影响。使用P-CNTs实现了更高的效率，除油率近97%，而使用C-CNTs的除油率为87%。
