Construction of superhydrophilic and underwater superoleophobic corn stalk/konjac glucomannan aerogel for high-efficiency oil/water emulsion separation

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-d...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2022, 39(10), 271, pp.2664-2674
Main Authors: Wang, Wenfeng, Mou, Lu, Yang, Di, Wang, Yuanhao, Yang, Fan
Format: Article
Language:English
Subjects:
Aerogels
Agricultural wastes
Antifouling
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Corn
Efficiency
Emulsions
Environmental Engineering
Industrial Chemistry/Chemical Engineering
Industrial development
Industrial wastes
Materials Science
Separation
Sol-gel processes
Toluene
Underwater construction
Wastewater treatment
화학공학
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Summary: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 3.50 K 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.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-022-1133-0