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One-pot route to synthesize HNTs@PVDF membrane for rapid and effective separation of emulsion-oil and dyes from waste water
journal contributionposted on 2019-12-15, 00:00 authored by L Zhou, Y He, H Shi, G Xiao, S Wang, Z Li, Jingyu Chen
Water-purification membranes with high water flux, excellent recycling ability, good anti-fouling property, wide range for different oil/water emulsions separation, and strong water-soluble dyes removal ability are highly desirable for water purification but still a challenge to be realized. In this work, we show a simple method to address this challenge, in which halloysite nanotubes (HNTs) have been decorated on the poly (vinylidene fluoride) (PVDF) membrane surface through one-pot method via the aid of KH550 and dopamine. The HNTs@PVDF composite membrane exhibits superhydrophilic and under-water superoleophobic performance. In addition, our membrane can separate wide oil/water emulsions (including surfactant-stabilized and surfactant-free emulsions) from wastewater with high efficiency (>99.65%), outstanding recycle ability with good flux recovery rate (FRR > 95%) and good anti-fouling performance (the underwater oil contact angle (OCA) is 155.8 ± 1.8° with low oil adhesion) and high water flux (7994 ± 150 L m−2 h-1). Interestingly, our membrane also removes different water-soluble dyes (e.g., Congo red, methylene blue, and rhodamine B) from waste water by simply filtering. Those outstanding properties make our membrane hold great potential applications in real-world water purification and environmental protection.
JournalJournal of Hazardous Materials
Pagination1 - 12
LocationAmsterdam, The Netherlands
Publication classificationC Journal article; C1 Refereed article in a scholarly journal
Copyright notice2019, Elsevier B.V.
CategoriesNo categories selected
HNTsSpecial wettabilityEmulsion separationDye adsorptionScience & TechnologyTechnologyLife Sciences & BiomedicineEngineering, EnvironmentalEnvironmental SciencesEngineeringEnvironmental Sciences & EcologyUNDERWATER SUPEROLEOPHOBICITYHALLOYSITE NANOTUBESSURFACE MODIFICATIONFOULING PROPERTYINSPIRED METHODNANOFILTRATIONULTRAFILTRATIONDOPAMINEPOLYDOPAMINEPERFORMANCE