Abstract To efficiently clean oily wastewater with the linear anion polyacrylamide (APAM), selective adsorption strategy belonging to phase equilibrium separation is introduced into the membrane separation. Herein, bimetallic Ce-UiO-66-NH2/diatomite (CUD) were first synthesized by a one-step hydrothermal method and then employed as a functional layer to form CUD self-assembled membrane (CSA-membrane). CUD particles were characterized by FT-IR, XRD and SEM, and CSA-membrane was observed by SEM. The separation and the selective adsorption properties of CSA-membrane formed under the optimum conditions for APAM in oily wastewater were investigated. The results demonstrate that the size of CUD particles with proper sphericity is mainly 20 μm. Furthermore, CSA-membrane simultaneously exhibits fascinating separation and selective adsorption properties for cleaning oily wastewater, namely the concentration of oil decreases from 78.1 mg L-1 to 6.8 mg L-1, and flux of CSA-membrane reaches 789.5 L m-2 h-1. Remarkably, the adsorption capacity of CSA-membrane for APAM is 161.5 mg g-1, while showing the APAM removal rate of 51.3%. Therefore, CSA-membrane with the synergetic effect of phase equilibrium and rate separation is promising alternative for cleaning oily wastewater with APAM.

中文翻译：

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双金属Ce-UiO-66-NH2/硅藻土（CUD）自组装膜同时具有相平衡和速率分离的协同效应

摘要 为了高效净化含线性阴离子聚丙烯酰胺（APAM）含油废水，将属于相平衡分离的选择性吸附策略引入膜分离。在此，双金属 Ce-UiO-66-NH2/硅藻土 (CUD) 首先通过一步水热法合成，然后作为功能层形成 CUD 自组装膜 (CSA-membrane)。通过FT-IR、XRD和SEM对CUD颗粒进行表征，通过SEM观察CSA膜。研究了在含油废水中APAM最佳条件下形成的CSA膜的分离和选择性吸附性能。结果表明，具有适当球形度的CUD颗粒尺寸主要为20 μm。此外，CSA-membrane同时表现出令人惊叹的分离和选择性吸附特性，用于清洁含油废水，即油浓度从78.1 mg L-1降低到6.8 mg L-1，CSA-membrane通量达到789.5 L m-2 h-1 . 值得注意的是，CSA 膜对 APAM 的吸附容量为 161.5 mg g-1，而 APAM 去除率为 51.3%。因此，具有相平衡和速率分离协同效应的 CSA 膜是用 APAM 净化含油废水的有前途的替代品。