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 a dye molecule, rose bengal, in aqueous phase. The external surface of ZIF-L was shown to exhibit strong affinity for rose bengal. We also observed that small crystals (with a large external surface area) are beneficial to adsorption. The surfactant CTAB was used in the synthesis of ZIF-L-based membrane adsorbers in order to reduce the size of ZIF-L particles and increase the loading of ZIF-L within the membrane. The membrane adsorber synthesized with the highest concentration of CTAB achieved the highest dynamic adsorption capacity. The ZIF-L-based membrane adsorbers exhibited water permeance (approximately 2 × 10⁴ L m⁻² bar⁻¹ h⁻¹) far exceeding that of most existing membrane adsorbers.

中文翻译：

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高性能的金属-有机骨架基膜吸附剂，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玫瑰红的膜。ZIF-L的外表面显示出对孟加拉玫瑰具有很强的亲和力。我们还观察到小晶体（具有大的外表面积）有利于吸附。为了减少ZIF-L颗粒的尺寸并增加ZIF-L在膜内的负载，表面活性剂CTAB被用于ZIF-L基膜吸附剂的合成。以最高浓度的CTAB合成的膜吸附剂具有最高的动态吸附能力。基于ZIF-L的膜吸附器表现出水渗透性（大约2×10⁴ L m ^-2 bar ^-1 h ^-1），远远超过大多数现有的膜吸附器。