纳米n-Ag/SiO2@Fe3O4饮用水消毒抗菌性能与机理研究

项目名称： 纳米n-Ag/SiO2@Fe3O4饮用水消毒抗菌性能与机理研究

项目编号： No.51478322

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 其他

项目作者： 隋铭皓

作者单位： 同济大学

项目金额： 85万元

中文摘要： 纳米抗菌材料在饮用水消毒处理中应用研究为较新领域，其显著优势在于可以克服化学消毒过程消毒副产物生成问题。纳米抗菌材料已被证实可高效抗菌，但理论层面上需对抗菌过程生化安全、抗菌机理深入探究；技术层面上需解决纳米颗粒难固液分离问题。本研究引入n-Ag/SiO2@Fe3O4用于饮用水消毒，其抗菌主体纳米银n-Ag具高抗菌活性且安全无毒；磁核Fe3O4可实现纳米材料分离循环利用；核壳SiO2可防止n-Ag团聚、提高纳米材料水中分散性、保护磁核磁性。通过建立纳米抗菌材料物化性质与抗菌活性关系，制备高抗菌活性材料；以水中不同菌种为研究对象，研究纳米抗菌材料对细菌（含耐氯菌）抗菌行为特征；摸清抗菌过程内毒素成分释放、分解规律，评价纳米材料抗菌生化安全性；研究抗菌过程活性物种的生成规律，探析纳米抗菌材料抗菌机制。本研究预期可为推进纳米抗菌材料在（饮用）水处理中高效、安全应用提供理论依据和技术支持。

中文关键词： 纳米抗菌材料；消毒；饮用水；纳米银；磁性分离

英文摘要： The application of nanomaterials as antimicrobial agents for water disinfection is a newly developed but promising topic, the advantage of which can avoid the generation of disinfection byproduct. It has been proved that nanomaterials can effectively deactivate the bacteria in water, while it still needs further understanding on its safety (release of endotoxin), antibacterial mechanism in theory and the separation of nano-particles from water in practice. In this work, nano n-Ag/SiO2@Fe3O4 is introduced for water disinfection. The nano-Ag possesses high antibacterial activity and has no health impact, the magnetic Fe3O4 will make the nanomaterial separated from water, and the shell SiO2 can prevent the aggregation of nano-Ag, improve its dispersion and protect the magnetism of Fe3O4. Highly active antibacterial nanomaterial will be prepared based on the theoretical relation of the chem-physical properties of n-Ag/SiO2@Fe3O4 with its antibacterial activity. The fate of different bacteria including anti-chlorine bacterial will be investigated. The safety of nanomaterial bactericidal process will be evaluated by clarifying the release and decomposition of endotoxin. The active species will be detected to discuss the antibacterial mechanism. The research results from this work are expected to promote the possible application of nanomaterials as disinfectants in water and wastewater disinfection processes.

英文关键词： antimicrobial nanomaterials;disinfection;drinking water;nano-Ag;maganetic separation