纳米TiO<sub>2</sub>对模型病毒——f2噬菌体的吸附特性
摘要
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 TiO<sub>2</sub> for virus. The effect of different TiO<sub>2</sub> 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 TiO<sub>2</sub> 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 TiO<sub>2</sub> for f2 phages meets Freundlich adsorption isotherms model (<italic>q</italic><sub>e</sub>=27.4·<italic>C</italic><sub>e</sub><sup>1.24</sup>), 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 TiO<sub>2</sub>.