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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 the drinking water treatment system, static adsorption experiments were conducted to study the adsorption and removal properties of the model virus -f2 phage by nano-TiO2. The effects of TiO2 concentration, virus concentration, temperature and pH on the adsorption The experimental results showed that the adsorption of f2 phage on the surface of nano-TiO2 was in accordance with the quasi-second-order adsorption kinetics model, and the intra-particle diffusion was the rate-controlling step in the adsorption process following the chemical adsorption mechanism, but it was not the only control step; The adsorption of f2 bacteriophage by TiO2 conformed to the Freundlich isotherm model (qe = 27.4Ce1.24), which belonged to the multi-layer adsorption type. In the range of 20-40 ℃, the temperature had little effect on the adsorption of nano-TiO2, Is conducive to nano-TiO2 adsorption of f2 phage.