Abstract
AQS/PVDF and AQS/GO/PVDF redox mediator membranes were prepared with poly (vinylidene fluoride) (PVDF) as the raw supporting material of membrane, anthraquinone-2-sulfonic acid (AQS) as the redox mediator, and graphene oxide (GO) as an additive by an immersion precipitation method. The AQS content in the redox mediator membrane was optimized with the formation performance of AQS/PVDF membrane. With the optimal casting solution for AQS/PVDF membrane, GO was introduced as an additive to form AQS/GO/PVDF membrane. The effects of the redox mediator membranes on the bacterial decolorization of dye wastewaters were investigated. The results suggest that both AQS/PVDF and AQS/GO/PVDF membranes can promote the bacterial decolorization of dyes and the introduction of GO improves the decolorization rate more significantly because it can accelerate the electron transfer. Therefore, the conductivity of GO and the electron shuttle of AQS show a synergetic effect on accelerating the bacterial decolorization of dyes.
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