عرض بسيط للتسجيلة

المؤلفHailan, Sarah
المؤلفSobolciak, Patrik
المؤلفPopelka, Anton
المؤلفKasak, Peter
المؤلفAdham, Samer
المؤلفKrupa, Igor
تاريخ الإتاحة2024-05-01T06:32:51Z
تاريخ النشر2023
اسم المنشورEnvironmental Science and Pollution Research
المصدرScopus
المعرّفhttp://dx.doi.org/10.1007/s11356-023-29055-x
الرقم المعياري الدولي للكتاب9441344
معرّف المصادر الموحدhttp://hdl.handle.net/10576/54521
الملخصThis study deals with the efficient, low-cost, and scalable treatment of oily polluted waters including colloidal emulsions, oil-in-water mixtures, and free oil removal using melamine foams (MFs) modified by ferric chloride (FeCl3). Modified foams have superhydrophobic character due to the coordination of Fe3+ with free electron pairs on nitrogen and oxygen atoms within the melamine structure. The water contact angles (WCA) were 146° ± 2°, 148° ± 4°, 153° ± 2°, and 150° ± 4° for foams modified by the solutions with concentrations of 0.001 M, 0.005 M, 0.01 M, and 0.02 M, respectively. This modification enables the efficient treatment of various oil/water systems, including oil/water colloidal emulsions (99 vol% of the droplets have dimensions below 500 nm), oil-in-water mixtures up to 40 weight % of the oil component, and “free” oil removal as it was demonstrated in this study for the first time. The emulsions containing 100 ppm diesel oil (DO) were separated with 91.4% efficiency, and the mixtures containing 20 and 40 weight % DO were separated with 99.9% efficiency. Modified foams also quickly remove free DO from the water surface, absorbing 95 g/g DO, whereas water sorption was negligible. The separation of colloidal oil in water emulsions represents the key finding of this study as it indicates the applicability of the treated MFs for the treatment of emulsified industrial wastewater. The demulsification mechanism is based on multiple diffusion processes running at different time scales, including diffusion of the emulsion into the foam and diffusion of oil droplets within the foam, combined with parallel adsorption of oil droplets onto the solid skeleton of the foam. A multiplied usage of these foams for all these niche operations was also proven. The application of our current study with previous studies on modified MFs and polyurethane for water oil separation utilization is summarized in Table S1 ESI.
راعي المشروعOpen Access funding provided by the Qatar National Library. This research was made possible by a grant from the Qatar National Research Fund under its National Priorities Research Program (award number NPRP12S-0311-190299) and by financial support from the ConocoPhillips Global Water Sustainability Center (GWSC) and Qatar Petrochemical Company (QAPCO). The paper's content is solely the responsibility of the authors and does not necessarily represent the official views of the Qatar National Research Fund, ConocoPhillips, or QAPCO.
اللغةen
الناشرSpringer Science and Business Media Deutschland GmbH
الموضوعAbsorption capacity
Emulsions
Melamine foams
Oil removal
Superhydrophobicity
Superoleophilicity
العنوانComplex treatment of oily polluted waters by modified melamine foams: from colloidal emulsions to a free oil removal
النوعArticle
الصفحات97872-97887
رقم العدد43
رقم المجلد30


الملفات في هذه التسجيلة

Thumbnail

هذه التسجيلة تظهر في المجموعات التالية

عرض بسيط للتسجيلة