An air oxidation strategy was developed for the first time to modify the microstructure and separation performance of microfiltration carbon membranes (MFCMs) for oily wastewater treatment. The structure and property of MFCMs were characterized by the techniques of Fourier transform infrared spectroscopy, scanning electron microscope, pore size distribution, porosity, X-ray diffraction, nitrogen adsorption and water contact angle. The results have shown that the oxidation can effectively modulate the porous structure, surface property and separation performance of MFCMs by varying air oxidation temperature and holding time. The optimal separation performance was respectively achieved to 554.5 kg m⁻² h⁻¹ for water permeation flux and 99.0% for oil rejection when MFCMs were oxidized at 80 °C for 30 min. Meanwhile, the anti-fouling ability of MFCMs was substantially improved by two-fold for the flux recovery ratio after oxidation modification. In brief, the work has been proved that the air oxidation is one of the most promising strategies for tailoring MFCMs to efficiently remove the emulsified oil from wastewater.

首次开发了一种空气氧化策略来改变微滤碳膜 (MFCM) 用于含油废水处理的微观结构和分离性能。采用傅里叶变换红外光谱、扫描电子显微镜、孔径分布、孔隙率、X射线衍射、氮吸附和水接触角等技术对MFCMs的结构和性能进行了表征。结果表明，氧化作用可以通过改变空气氧化温度和保持时间来有效调节 MFCMs 的多孔结构、表面性质和分离性能。最佳分离性能分别达到554.5 kg m ^-2 h ^-1当 MFCM 在 80°C 下氧化 30 分钟时，水渗透通量和油去除率为 99.0%。同时，MFCMs的抗污染能力在氧化改性后通量恢复率提高了两倍。简而言之，这项工作已经证明，空气氧化是定制 MFCM 以有效去除废水中乳化油的最有前途的策略之一。