The growing utilization of Traditional Chinese Medicine (TCM) has resulted in an increase in wastewater. Herein, a new kind of organic-inorganic redox mediator membrane by immobilizing γ-FeO(OH) and aloe-emodin(AE) with the characteristic large π-conjugation anthraquinone structure on PVDF membrane was innovatively achieved. AE exhibiting both electron deficiency and redox activity possesses a co-catalyst role in degradation of tannic acid (TA), aiding in the separation of charge carriers through the sequential hydrogenation and dehydrogenation of AE. The removal rates of TA were 92.8 % in the tannic acid solution and 60.3 % in the simulated rhubarb wastewater by the AE-γ-FeO(OH) membrane under PMS+Vis conditions in 45 min. Also, they show a higher recovery of pure water flux and owning good fouling performance. Overall, this current work presents a novel approach for the design and preparation of organic-inorganic photocatalytic composite membrane using readily available natural products for the purification TCM wastewater.

中文翻译：

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天然氧化还原介体蒽醌芦荟大黄素促进原位矿化γ-FeO(OH)膜通过光催化-PMS活化去除单宁酸


中药（TCM）利用的不断增长导致废水增加。在此，通过在PVDF膜上固定具有大π共轭蒽醌结构的γ-FeO(OH)和芦荟大黄素(AE)，创新性地实现了一种新型有机-无机氧化还原介体膜。 AE同时表现出缺电子和氧化还原活性，在单宁酸（TA）的降解中具有助催化剂作用，通过AE的连续氢化和脱氢有助于电荷载体的分离。 AE-γ-FeO(OH)膜在PMS+Vis条件下45 min对单宁酸溶液中TA的去除率为92.8%，对模拟大黄废水中TA的去除率为60.3%。此外，它们还表现出较高的纯水通量回收率并具有良好的污垢性能。总的来说，目前的工作提出了一种利用现成的天然产物设计和制备有机-无机光催化复合膜来净化中药废水的新方法。