In this study, ordered mesoporous carbons (OMCs), i.e., CMK-3 and CMK-8 were pre-deposited on ultrafiltration membrane surface to alleviate membrane fouling by organic matter in the water. CMK-3 shows a typical 2D hexagonal symmetrical structure with long straight parallel channels, while CMK-8 exhibits a 3D porous structure with cubic channels. The pre-deposited CMK-3/CMK-8 layers exhibited significantly superior performance for both flux enhancement and fouling mitigation, whereas powdered activated carbon (PAC) showed limited influence. The fouling mechanism was apparently altered by the OMCs pre-deposition layers, and pore blocking always dominated throughout the filtration process without the formation of cake filtration. In comparison with PAC, CMK-3 and CMK-8 were more effective for the rejection of tryptophan-like protein substances, which were the major foulants causing membrane fouling. The effects of pollutant fraction and deposited amount (i.e., 6, 12, 25 and 50 g/m²) were systematically explored, and the results indicated that this technology was more efficient for alleviating the fouling induced by humic acid and bovine serum albumin, whereas ineffective for sodium alginate fouling, and the optimal deposited amount varied with the pollutant fraction. CMK-3 exhibited significantly superior performance than CMK-8, likely due to its long straight parallel channels with lower internal resistance for pollutants adsorption. Both adsorption and size exclusion of the pre-deposited layers contributed to fouling mitigation. These results demonstrate that pre-depositing with OMCs as alternatives to conventional PAC shows promising potential for mitigating membrane fouling in water treatment.

在这项研究中，有序介孔碳（OMCs），即CMK-3和CMK-8被预先沉积在超滤膜表面，以减轻水中有机物对膜的污染。CMK-3显示具有长直平行通道的典型2D六角形对称结构，而CMK-8显示具有立方通道的3D多孔结构。预先沉积的CMK-3 / CMK-8层在通量增强和结垢缓解方面均表现出明显优越的性能，而粉状活性炭（PAC）的影响有限。OMCs的预沉积层明显改变了结垢机理，并且在整个过滤过程中孔阻塞始终占主导地位，而不会形成滤饼过滤。与PAC相比，CMK-3和CMK-8对色氨酸样蛋白物质的排斥更为有效，这是造成膜污染的主要污垢。污染物分数和沉积量（即6、12、25和50 g / m）的影响²）进行了系统地探索，结果表明该技术在减轻腐殖酸和牛血清白蛋白引起的结垢方面更为有效，而对藻酸钠的结垢效果不佳，并且最佳沉积量随污染物分数而变化。CMK-3表现出明显优于CMK-8的性能，这可能是因为CMK-3的长直平行通道具有较低的吸附污染物内阻。预沉积层的吸附和尺寸排阻均有助于减轻结垢。这些结果表明，用OMC进行预沉积作为常规PAC的替代方法，显示出减轻水处理中膜污染的潜力。