抗协同污染聚芳醚砜超滤膜的制备及机理研究

Ultrafiltration membrane separation technology could provide reliable security guarantee and novel technical support for advanced treatment of municipal sewage, implement the recycling of water resources and reduce the pollution of wastewater. So in this project, aimed at the ultrafiltration membrane fouling problems at the advanced treatment of municipal sewage, two series of novel poly(arylene ether sulfone)s with regulative surface properties were designed and prepared. At the same time, the interactions of ultrafiltration membranes with hydrophilic and hydrophobic pollutants were analyzed. Moreover the relationship between the molecular structures of ultrafiltration membrane materials and the synergistic fouling resistant properties as well as the separation properties were investigated. Further, the antifouling mechanism and mass transfer mechanism of synergistic fouling resistant poly(arylene ether sulfone) ultrafiltration membranes were discussed. Finally, the design principles and preparation methods of antifouling poly(arylene ether sulfone) ultrafiltration membranes for advanced treatment of municipal sewage were summarized and afforded.

超滤膜分离技术是实现城市污水再生和水资源循环利用、减轻水环境污染的重要手段。然而，二级出水中疏水性污染物和亲水性污染物不可避免地通过协同作用致使聚芳醚砜类超滤膜产生严重的膜污染问题，从而影响其在二级出水深度处理过程中的应用效果。本项目针对上述难题，通过分子结构设计，制备材料表面特性可调控的新型聚芳醚砜超滤膜，分析超滤膜表面特性的变化对超滤膜与二级出水中复合污染物之间相互作用的影响，研究聚芳醚砜类超滤膜受到二级出水中复合污染物的协同污染时，膜材料的分子结构与超滤膜抗协同污染性能和分离性能之间的关系及调控规律，解析抗协同污染聚芳醚砜超滤膜在二级出水深度处理过程中的抗污染机理和传质机制，为适用于城市污水超滤再生的抗污染聚芳醚砜超滤膜的制备和应用提供理论基础和实验依据。

滤膜分离技术是实现城市污水再生和水资源循环利用、减轻水环境污染的重要手段。然而，二级出水中疏水性污染物和亲水性污染物不可避免地通过协同作用致使聚芳醚砜类超滤膜产生严重的膜污染问题，从而影响其在二级出水深度处理过程中的应用效果。本项目针对上述难题，通过分子结构设计，成功制备了一系列表面特性可调控的新型聚芳醚砜超滤膜，进而分析了超滤膜表面特性的变化对超滤膜与二级出水中复合污染物之间相互作用的影响，研究了聚芳醚砜类超滤膜受到二级出水中复合污染物的协同污染时，膜材料的分子结构与超滤膜抗协同污染性能和分离性能之间的关系及调控规律，解析了抗协同污染聚芳醚砜超滤膜在二级出水深度处理过程中的抗污染机理和传质机制，为适用于城市污水超滤再生的抗污染聚芳醚砜超滤膜的制备和应用提供了理论基础和实验依据。此外，在本项目原有研究内容的基础上，进一步通过向超滤膜中引入反应性亲水无机填料的方式开展了反应性自清洁抗污染超滤膜的研究。