Abstract
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, CS3.50K1.25 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.
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Acknowledgements
The work was supported by the National Key Research and Development Program of China (No. 2019YFC0605003) and the Natural Science Foundation of Liaoning Province (No. 2019-ZD-0293).
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Wang, W., Mou, L., Yang, D. et al. Construction of superhydrophilic and underwater superoleophobic corn stalk/konjac glucomannan aerogel for high-efficiency oil/water emulsion separation. Korean J. Chem. Eng. 39, 2664–2674 (2022). https://doi.org/10.1007/s11814-022-1133-0
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DOI: https://doi.org/10.1007/s11814-022-1133-0