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Amino-functionalized mesoporous PVA/SiO2 hybrids coated membrane for simultaneous removal of oils and water-soluble contaminants from emulsion.
- Source :
-
Chemical Engineering Journal . Oct2019, Vol. 374, p1394-1402. 9p. - Publication Year :
- 2019
-
Abstract
- • Simultaneous oil-in-water emulsion separation and heavy metals/dyes adsorption. • Novel organic-inorganic hybrid gel coatings with mesoporous structure. • Fast oil/water separation and highly efficient water-soluble contaminants removal. • Excellent reusability, anti-fouling property and considerable chemical stability. A novel approach for simultaneously removing oil droplets and water-soluble contaminants from stabilized oil/water emulsion has been developed. Herein, the polyvinyl alcohol (PVA)/SiO 2 hybrid coatings were fabricated via "one-step" hydrolysis and co-condensation, which possesses unique mesoporous structures (pore diameter ≈ 9.31 nm) and abundant amino groups. Hydrophobic polyvinylidene fluoride (PVDF) membranes adhered firmly by the hybrid coatings, are endowed with superhydrophilicity/underwater superoleophobicity, excellent antifouling performance, ultrahigh water flux (6343.2 L m−2 h−1 bar−1), highly efficient oil-in-water emulsion separating capability (filtrate flux = 544.26 L m−2 h−1 bar−1) and gravity-driven separation capability. Moreover, copper ion (Cu2+) and methyl blue (MB) can be effectively absorbed from water phase, with considerable adsorption capacities (Q c) of 52.8 mg/g and 41.88 mg/g, respectively. After 5 reusing cycles, the relative removal efficiencies (RE) are still higher than 86.89% and 99.76%, respectively. Moreover, with the outstanding reusability and considerable chemical durability, the as-prepared membranes are promising candidate in practical application for wastewater treatment, bridging the gap between contaminants adsorption and oil/water separation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 374
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 137682233
- Full Text :
- https://doi.org/10.1016/j.cej.2019.05.161