Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Environ Sci Pollut Res Int. 2012 May;19(4):1224-8. doi: 10.1007/s11356-011-0670-6. Epub 2011 Nov 29.
In this study, manganese dioxide-coated multiwall carbon nanotube (MnO(2)/CNT) nanocomposite has been successfully synthesized.
The as-produced nanocomposite was characterized by different characteristic tools, such as X-ray diffraction, SEM, and FTIR. The MnO(2)/CNT nanocomposite was utilized as a fixed bed in a column system for removal of lead(II) from water. The experimental conditions were investigated and optimized. The pH range between 3 and 7 was studied; the optimum removal was found when the pH was equal to 6 and 7. The thickness of MnO(2)/CNT nanocomposite compact layer was also changed to find the optimum parameter for higher removal.
It was observed that the slower the flow rates of the feed solution the higher the removal because of larger contact time.
本研究成功合成了二氧化锰包覆多壁碳纳米管（MnO(2)/CNT）纳米复合材料。
通过 X 射线衍射、SEM 和 FTIR 等不同特征工具对所制备的纳米复合材料进行了表征。MnO(2)/CNT 纳米复合材料被用作柱系统中的固定床，用于去除水中的铅（II）。对实验条件进行了考察和优化。研究了 pH 值在 3 到 7 之间的范围；当 pH 值等于 6 和 7 时，发现去除效果最佳。还改变了 MnO(2)/CNT 纳米复合材料致密层的厚度，以找到更高去除率的最佳参数。
观察到由于接触时间更长，进料溶液的流速越慢，去除率越高。
