纳米TiO_2对模型病毒—f2噬菌体的吸附特性  

Adsorption characteristics of f2 bacteriophage onto nanometer titanium dioxide

作　　者：郑祥[1,2] 雷洋[2] 陈迪[2] 程荣[2] 

机构地区：[1]城市水资源与水环境国家重点实验室,哈尔滨工业大学,哈尔滨150090 [2]中国人民大学环境学院,北京100872

出　　处：《中国科学：化学》2013年第5期610-617,共8页SCIENTIA SINICA Chimica

基　　金：国家"十一五"重大科技专项(2009ZX07209-005);哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金项目(ES201005);北京市自然科学基金(8123043)资助

摘　　要：为了提高饮用水处理系统对病毒的去除效果,本研究采用静态实验,研究纳米TiO2对模型病毒—f2噬菌体的吸附去除特性,系统考察TiO2投加浓度、病毒浓度、温度及pH值等因素对吸附效果的影响.实验结果表明：f2噬菌体在纳米TiO2表面的吸附符合准二级吸附动力学模型,遵循化学吸附机理,颗粒内扩散为该吸附过程中的速率控制步骤,但不是唯一控制步骤;纳米TiO2对f2噬菌体的吸附符合Freundlich等温吸附模型（qe=27.4Ce1.24）,属于多层吸附类型;在20~40℃范围内,温度对纳米TiO2的吸附性能影响不大,而酸性条件下更有利于纳米TiO2对f2噬菌体的吸附.In order to improve the removal efficiency of virus of drinking water system, f2 phages were used as the model virus to study the adsorption characteristics of nanometer TiO2 for virus. The effect of different TiO2 adsorbent dosages, f2 phages concentration, reaction temperatures and pH values on the efficiency of adsorption was tested. The results show that the adsorption of f2 phages on the surface of nanometer TiO2 can be explained by pseudo-second adsorption dynamic model and follow the chemical adsorption mechanism, and particle inside diffusion is the control step of the rate of adsorption progress, but not the only control step. The adsorption of natural TiO2 for f2 phages meets Freundlich adsorption isotherms model （qe = 27.4. Ce 1.24）, which belongs to the multilayer adsorption type. In the range of 20--40℃, temperature influenced the adsorption capacity in a very minor way, whereas under acidic condition f2 phages were more likely to adsorb on nanometer TiO2.

关 键 词：纳米TIO2 F2噬菌体 吸附动力学 吸附等温线 

分 类 号：TU991.25[建筑科学—市政工程] O614.411[理学—无机化学]