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];Bai, Zhishan[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China

年份：2024

卷号：461

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20233814745360);WOS:【SCI-EXPANDED(收录号:WOS:001336383800001)】；

基金：This work was supported by National Key Research and Develop-ment Program of China (2022YFC3004504) , National Natural Science Foundation of China (22108082) , Shanghai Sailing Program (20YF1409800, 21YF1409500) and China Postdoctoral Science Foun-dation (2019TQ0094) .

语种：英文

外文关键词：Oily emulsion wastewater treatment; Superamphiphilic bio-aerogel; Wettability control; Demulsification separation; Pollutant synergistic removal

摘要：The deep treatment of robust oily emulsion wastewater has long been an arduous challenge. Herein, a biomassderived 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 superoleophobicity 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 the separation efficiency as high as 99.25%. In addition, PEI-TiO2@GA was highly resistant toward mechanical compression (1.952 MPa), and exhibited acceptable 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 show that the transition of interface wetting properties was a reversible multi-step process, and the demulsification separation of emulsion and the adsorption removal of co-existing pollutants were two independent processes. This work opens up a new avenue to customize advanced bio-aerogels for industrial effluent treatment and environmental remediation.