文献类型：期刊文献

英文题名：Facile Construction of Multifunctional Bio-Aerogel for Efficient Separation of Surfactant-Stabilized Oil-in-Water Emulsions and Co-Existing Organic Pollutant

作者：Wang, Bingjie[1]; Zhang, Hanyu[1]; Yang, Xiaoyong[1]; Tian, Tao[1]

机构：[1] State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230208863)

语种：英文

外文关键词：Aerogels - Demulsification - Efficiency - Effluent treatment - Effluents - Emulsification - Emulsions - Organic pollutants - Ostwald ripening - Sewage - Surface active agents - Titanium dioxide - Water pollution

摘要：The deep treatment of robust oily emulsion wastewater has long been an arduous challenge. Herein, a biomass-derived PEI-TiO2@Gelatin aerogel (PEI-TiO2@GA) with honeycomb-like porous structure was fabricated. The interface wetting characteristics of PEI-TiO2@GA could be selectively switched between the superlipophilicity and superoleopholicity through the merely pre-wetting process. Combined with extraordinary structure and superwetting properties, PEI-TiO2@GA was proved to be ideal for oils absorption (17-26 g/g) and MO dye adsorption (73.549 mg/g) with high up-taking rate. Simultaneously, as-prepared PEI-TiO2@GA could realize various surfactant-stabilized oil-in-water emulsions separation simply under gravity with separation efficiency as high as 99.21 % and permeation flux up to 203.56 L/m2·h. In addition, PEI-TiO2@GA was highly resistant toward mechanical compression (1.952 MPa), and showed stable and satisfied regenerability within 5 cycles by performing solvent replacement approach. Combining with the newly developed separator and dynamic emulsion separation device, the continuous deep separation of the emulsion and the synergistic removal of co-existing pollutants can be achieved with the enhanced separation efficiency and permeation flux. Most importantly, the mechanism results shows that emulsion demulsification and co-existing pollutant separation were two independent processes. This work opens up a new avenue to customize advanced bio-aerogels for industrial effluent treatment and environmental remediation. ? 2023, The Authors. All rights reserved.