Conducting Nanosponge Electroporation for Affordable and High-Efficiency Disinfection of Bacteria and Viruses in Water
Conducting Nanosponge Electroporation for Affordable and High-Efficiency Disinfection of Bacteria and Viruses in Water
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DOI：
10.1021/nl402053z
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发表时间：
2013-09-01
期刊：
影响因子：
10.8
通讯作者：
Cui, Yi
中科院分区：
文献类型：
--
作者：
Liu, Chong;Xie, Xing;Cui, Yi
非常需要高效、经济、低能耗的水消毒方法来预防腹泻病，腹泻病是世界上五大死因之一。传统的水消毒方法存在致癌消毒副产物形成、能源和时间密集以及病原体回收等缺点。在这里，我们报告了一种创新方法，通过引入由导电纳米海绵过滤装置实现的纳米材料辅助电穿孔来实现高效水消毒。使用一维 (1D) 纳米材料使得电穿孔仅需几伏电压，比传统电穿孔应用低 2 至 3 个数量级。电穿孔的消毒机制可防止有害副产物的形成，并确保 15 000 L/(h.m(2)) 的快速处理速度，相当于 1 s 的接触时间。导电纳米海绵由涂有碳纳米管和银纳米线的低成本聚氨酯海绵制成，确保了该设备的经济性。该方法对大肠杆菌、鼠伤寒沙门氏菌、粪肠球菌、枯草芽孢杆菌等4种模型细菌的去除率超过6 log（99.9999%），对噬菌体MS2等一种模型病毒的去除率超过2 log（99%），且能耗仅为100 J/L。
High-efficiency, affordable, and low energy water disinfection methods are in great need to prevent diarrhea] illness, which is one of the top five leading causes of death over the world. Traditional water disinfection methods have drawbacks including carcinogenic disinfection byproducts formation, energy and time intensiveness, and pathogen recovery. Here, we report an innovative method that achieves high-efficiency water disinfection by introducing nanomaterial-assisted electroporation implemented by a conducting nanosponge filtration device. The use of one-dimensional (1D) nanomaterials allows electroporation to occur at only several volts, which is 2 to 3 orders of magnitude lower than that in traditional electroporation applications. The disinfection mechanism of electroporation prevents harmful byproduct formation and ensures a fast treatment speed of 15 000 L/(h.m(2)), which is equal to a contact time of 1 s. The conducting nanosponge made from low-cost polyurethane sponge coated with carbon nanotubes and silver nanowires ensures the device's affordability. This method achieves more than 6 log (99.9999%) removal of four model bacteria, including Escherichia coli, Salmonella enterica Typhimirium, Enterococcus faecalis, and Bacillus subtilis, and more than 2 log (99%) removal of one model virus, bacteriophage MS2, with a low energy consumption of only 100 J/L.