Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States.
Langmuir. 2010 Dec 21;26(24):19153-8. doi: 10.1021/la103776y. Epub 2010 Nov 23.
We describe the concept and demonstrate the efficacy of a novel SWNT-MWNT hybrid filter for the removal and inactivation of microbial pathogens from water. The filter is composed of a thin SWNT layer (0.05 mg cm(-2)) on top of a thicker MWNT layer (0.27 mg cm(-2)) supported by a microporous support membrane. The SWNT-MWNT filter exhibits high log removal of several model viruses (MS2, PRD1, and T4 bacteriophages) by depth filtration, which predominantly takes place in the thicker and more uniform MWNT layer. The filter removes all bacteria by a sieving mechanism, with the top SWNT layer providing high levels of inactivation of model bacteria (Escherichia coli K12 and Staphylococcus epidermidis), as well as microbes from river water and treated wastewater effluent. The dual-layer SWNT-MWNT filter lays the framework for new possibilities in point-of-use water filtration.
我们描述了一种新型的碳纳米管-多壁碳纳米管混合过滤器的概念，并展示了其从水中去除和灭活微生物病原体的功效。该过滤器由一层薄的碳纳米管层（0.05 毫克/平方厘米）组成，上面覆盖着一层较厚的多壁碳纳米管层（0.27 毫克/平方厘米），由微孔支撑膜支撑。SWNT-MWNT 过滤器通过深度过滤表现出对几种模型病毒（MS2、PRD1 和 T4 噬菌体）的高对数去除，这主要发生在较厚且更均匀的 MWNT 层中。该过滤器通过筛分机制去除所有细菌，顶部的 SWNT 层对模型细菌（大肠杆菌 K12 和表皮葡萄球菌）以及来自河水和处理后的废水的微生物具有高水平的灭活作用。这种双层 SWNT-MWNT 过滤器为即用水过滤提供了新的可能性。
