Preparation of Quinone Mediator / Polyvinylidene Fluoride Functionalized Membrane

Abstract

In this study, the redox mediator accelerated the degradation of dyes and improved the efficiency of dye wastewater treatment by immobilizing quinone mediators on the membrane. Specifically, polyvinylidene fluoride, quinone, and lithium chloride were used as the membrane substrate, redox mediator modifier, and porogen, respectively. By changing the type of quinone, the concentration of quinone, and the concentration of crossing-linker, the effect of quinone mediator-functionalized polyvinylidene fluoride membrane on the decolorization of dye wastewater was investigated. This study has shown that the cross-linking agent could effectively improve the compatibility of the quinone mediator casting solution system, and the increase in the addition amount of quinone mediator increased the decolorization rate of the membrane. The increase of the quinone content could also improve the decolorization effect of the dye. The decolorization rate of the original membrane without adding quinone was only 36%, whereas the decolorization rate of the blend membrane reached 75%, which shows the PVDF film with immobilized quinone mediator exhibited a significant dye degradation effect.