An anti-fouling aerogel with superior separation performance for separation of oil/water emulsion is of great significance to industrial development due to continuously increasing oily industrial wastewater. Herein, a superhydrophilic/underwater superoleophobic porous biobased aerogel with a three-dimensional network structure was prepared by the agricultural waste corn stalk (CS) incorporated with konjac glucomannan (KGM) through simple sol-gel and freeze-drying methods. The oil/water separation mechanisms and the effect of aerogel structural changes on the separation performance of CS/KGM aerogel for oil-in-water emulsions are discussed in detail. Using toluene as an oil phase, CS_3.50K_1.25 exhibited outstanding separation performance with an excellent separation efficiency above 96.26% and a high permeate flux above 2,381 L m⁻² h⁻¹ for oil-in-water emulsions. As expected, the separation efficiency and permeation flux can be wholly recovered after washing, indicating the aerogel possesses good sustainability. Moreover, CS/KGM aerogel has the advantages of low cost, simple preparation, eco-friendly and anti-fouling, revealing a promising candidate for the treatment of oily wastewater pollution.

【摘要】：随着含油工业废水的不断增加,一种分离性能优越的防污气凝胶用于油水乳液分离,对工业发展具有重要意义。在此，通过简单的溶胶-凝胶和冷冻干燥方法，将农业废弃玉米秸秆（CS）与魔芋葡甘聚糖（KGM）结合，制备了一种具有三维网络结构的超亲水/水下超疏油多孔生物基气凝胶。详细讨论了油水分离机理和气凝胶结构变化对CS/KGM气凝胶水包油乳液分离性能的影响。使用甲苯作为油相，CS _3.50 K _1.25表现出出色的分离性能，分离效率高于 96.26%，水包油乳液的渗透通量高于 2,381 L m ^-2 h ^-1。正如预期的那样，洗涤后分离效率和渗透通量可以完全恢复，表明气凝胶具有良好的可持续性。此外，CS/KGM气凝胶具有成本低、制备简单、环保、防污等优点，为处理含油废水污染提供了广阔的前景。