This paper reports on a novel membrane adsorber comprising metal-organic frameworks (MOFs) for water treatment. Two types of MOF (ZIF-8 and ZIF-L) were grown within a porous α-alumina support to form a membrane for the adsorption of the dye molecule, Rose Bengal, in aqueous phase. The external surface of the ZIF-L was shown to possess a strong affinity for Rose Bengal. We also observed that small crystals (with large external surface area) are beneficial to adsorption. The surfactant CTAB was used in the synthesis of ZIF-L-based membrane adsorber in order to reduce the size of ZIF-L particles and increase the loading of ZIF-L within the membrane. The membrane adsorber with the highest concentration of CTAB achieved the highest dynamic adsorption capacity. ZIF-L-based membrane adsorbers exhibited water permeance (10^4 L/m^2/bar/h) far exceeding that of most existing membrane adsorbers.

中文翻译：

---

高性能金属有机骨架膜吸附剂，用于去除水相中的染料分子

本文报道了一种新型的膜吸附器，该膜吸附器包含用于水处理的金​​属有机骨架（MOF）。两种类型的MOF（ZIF-8和ZIF-L）在多孔α-氧化铝载体中生长，形成用于在水相中吸附染料分子Rose Bengal的膜。ZIF-L的外表面对玫瑰红具有很强的亲和力。我们还观察到小晶体（具有大的外表面积）有利于吸附。为了减小ZIF-L颗粒的尺寸并增加膜中ZIF-L的负载，表面活性剂CTAB被用于ZIF-L基膜吸附剂的合成中。CTAB浓度最高的膜吸附器具有最高的动态吸附能力。