Construction of Zif-8 Composited Hydrogel Coating with Durable Superhydrophilicity and Dyes Adsorption Properties for Efficient Separation of Emulsified and Dyed Wastewater

Published: Jan. 1, 2024

The complex wastewater contaminated with oil and organic dyes tremendously threatens ecological environment human habitat. single functional membrane separation technology is not qualified to deal treatment. Therefore, it necessary develop multifunctional materials possess the ability both oil/water dye adsorption. Hence, we a simple environmental strategy incorporate zeolitic imidazolate framework-8 (ZIF-8) as adsorbent into superhydrophilic hydrogel coated PVDF through in-situ growth gained anti-oil fouling adsorption properties. prepared tannic acid-poly(acrylamide-co-acrylic acid)-sodium alginate@ZIF-8 (TPS@ZIF-8) exhibited high oil-in-water emulsion efficiency of 99.77% after 10 cycles outstanding property that flux recover rate more than 96.86% in continuous filtration experiment, owing strong hydration TPS@ZIF-8 coating. Moreover, abundant active sites (including –COO-, phenolic hydroxyl benzene ring) consisted by ZIF-8 hydrophilic groups on TPS@ZIF-8-PVDF improved capacity selective cationic over 97.01%. process for methylene blue (MB) followed pseudo-second-order kinetic model Langmuir model. Combining underwater superoleophobic properties, could simultaneously separate mixtures showed cycle performance stability. Furthermore, maintain superwetting properties various chemical mechanical environments. This study offers new insights design treatment purification.

Language: Английский

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A Thiolated Tio2-Based Superhydrophobic Wood for Fast Oil-Water Separation and Heavy Metal Detection

Published: Jan. 1, 2024

The discharge of pollutants, including oily wastewater and heavy metal ions, into water has been on the rise, posing significant risks to environmental integrity public health. Moreover, ions that cause more serious damages are easily neglected in oil-water separation. Herein, a superhydrophobic wood with photocatalytic capability for fast separation detection was designed prepared via coating epoxy resin (ER) sulfhydryl modified titanium dioxide (s-TiO2) through pre-curing method. Owing special porous structure superhydrophobicity s-TiO2@ER wood, mixture successfully separated flux 11,350 kg·m-2·h-1 efficiency 99.3%. Due method, s-TiO2 adhered ER surface -SH groups exposed outermost, which beneficial adsorption ions. When adsorbing Cu2+, Fe3+, Co2+, Cr3+, displayed colors green, yellow, pink, brown, respectively, could be used during process. Importantly, exhibited high Cu2+ ion reaching 137 mg/g. Furthermore, demonstrated good photodegradation capability, organic pollutants adsorbed after use degraded prevent secondary pollution. This work provides excellent ability, is promising filed treating complex containing metals.

Language: Английский

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Anti-Fouling Ternary Zwitterionic Coating Membrane with Strong Surface Hydration and Salt Resistant for Efficient Long-Term Emulsion Separation in High Salinity Marine Environment

Published: Jan. 1, 2024

Language: Английский

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Facile Preparation of Smart Sponge Based on a Zeolitic Imidazolate Framework for the Efficient Separation of Oily Wastewater

Coatings, Journal Year: 2024, Volume and Issue: 14(8), P. 1058 - 1058

Published: Aug. 18, 2024

The fabrication of durable materials with excellent oil-adsorption capacity and separation performance for the treatment oily wastewater is meaningful based on special property smart responsiveness. Herein, a solvent-responsive melamine sponge (MS) was developed via silanization in situ growth zeolitic imidazolate framework-8 (ZIF-8). Detailed characterization resultant composite MS conducted using scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), X-ray diffraction (XRD). multiscale hierarchical substrate exhibited highly hydrophobic properties pH range 1–11, along satisfactory adsorption 65.4–134.2 g/g different oils. modified surface transformed from superhydrophobic/superlipophilic to superhydrophilic/underwater superoleophobic upon ethanol wetting, reverting its original superhydrophobic state drying. flux above 1.5 × 104 L/m2h both oil water removal, efficiency greater than 98.7%. absence obvious changes after 50 successive immiscible oil−water separations indicated durability robustness anchored ZIF-8 nanoparticles substrate. More importantly, oil-in-water emulsion successfully carried out composite, showing high (over 99.1%). sponge, which had capacity, chemical stability, fire resistance, has wide potential practical applications convenient wastewater.

Language: Английский

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Molecularly Engineered Under-Liquid Dual Superlyophobic Coatings for Efficient and On-Demand Oil/Water Separation

Published: Jan. 1, 2024

Language: Английский

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