Preparation of superhydrophobic magnetic sawdust for effective oil/water separation

Yin, Zichao; Li, Yuhang; Song, Tianwen; Bao, Mutai; Li, Yiming; Lu, Jinren; Yang, Li

doi:10.1016/j.jclepro.2020.120058

Cited by 49 publications

(20 citation statements)

References 51 publications

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“…However, up to now, adsorption is still signified as a simple and effective technology for eliminating synthetic dyes from aqueous matrix once appropriate adsorbents are applied. Examples of the technique are including dye removal (Ashour et al 2014;Oyewo et al 2020;Thabet et al 2021b; Tony 2021a), heavy metals elimination (Abdou et al 2018;Li et al 2011), oil uptake (Soliman et al 2020;Tony and Lin 2020b;Tony et al 2015) and organic compounds (Tony and Lin 2020a; Yin et al 2020). Hence, researchers' attempts for finding cost-efficient with high yield uptake materials, as adsorbents are still their research burdens.…”

Section: Introductionmentioning

confidence: 99%

Aquananotechnology: oriented-sawdust waste valorization into magnetic nanocellulosic particles for Synozol Red K-HL sorption prospect

Tony

2022

Appl Water Sci

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High loaded textile dying effluents should undergo for treatment prior to final disposal into the environment. The current study aimed to apply naturally abundant and cheap by-product material namely sawdust (SWD) to develop magnetized cellulosic nano-adsorbent based on magnetite nanoparticles for reactive dye removal namely Synozol Red K-HL (R K-HL). The powder of SWD, which is available through various industries, was modified via pre-treatment with acid hydrolysis and bleaching before blending them with magnetite particles which is synthesized via co-precipitation route. Sawdust (SWD) conjugated with Fe3O4 at different weight percentages (wt%), i.e. SF-(1:1), SF-(2:1), SF-(3:1), SF-(5:1) and SF-(1:2), then subjected to microwave technique, and then characterized by X-ray diffraction spectroscopy (XRD); transmission electron microscope (TEM); Fourier transform infrared (FTIR). Thereafter, the effects of system parameters on adsorption capability, i.e. pH, temperature and dye loading were studied using the modified adsorbents. The SF-(2:1) adsorbent showed the highest affectivity which achieved the highest (21.71 mg g−1) adsorption uptake with a catalyst dosage of 1 g L−1. Moreover, a complete dye removal (100%) was attained at low initial dye loading in the aqueous medium. Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D-R) isotherm models and their corresponding constants were calculated and discussed. The experimental results showed that the Langmuir isotherm model is well expressed in the experimental data. The kinetics of R K-HL dye removal was found to depend on operational temperature. A study of three kinetic models has been made, and the Bangham’s kinetic model was found to describe the adsorption of dye R K-HL on all the adsorbents applied. The adsorption of reactive R K-HL onto magnetized sawdust adsorbents was spontaneous and exothermic in nature as concluded from thermodynamic assays. Experimental results verified that dye R K-HL could be successfully eliminated feasibly from the aqueous stream in economic way.

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Section: Introductionmentioning

confidence: 99%

Aquananotechnology: oriented-sawdust waste valorization into magnetic nanocellulosic particles for Synozol Red K-HL sorption prospect

Tony

2022

Appl Water Sci

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“…For the preparation of superhydrophobic coatings, various methods have been proposed, including immersion 19 , electrospinning 20 , electrodeposition 6 , layer self-assembly 21 , plasma etching 4 , chemical vapour deposition 22 , electrochemical anodic oxidation 23 , phase separation 24 , dipping 25 , spraying 2 , and sol–gel methods 26 . Electrodeposition is an excellent technique for constructing artificial superhydrophobic surfaces because of its low-temperature process, clean, low cost, simplicity, and controllable nanostructure 6 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of eco-friendly graphene-based superhydrophobic coating on steel substrate and its corrosion resistance, chemical and mechanical stability

Mohamed

Ezzat

Abdel‐Gaber

2022

Sci Rep

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Superhydrophobic coatings were successfully fabricated on steel substrates using potentiostatic electrodeposition of Ni and Ni-graphene, Ni-G, coatings followed by immersion in an ethanolic solution of stearic acid, SA. Rice straw, an environmentally friendly biomass resource, was used to synthesize high-quality graphene. The Raman spectra proved the high quality of the produced graphene. The Fourier transform infrared spectroscopy, FTIR, results showed that the Ni coating grafted with stearic acid, Ni-SA, and the Ni-G composite grafted with stearic acid, Ni-G-SA, were successfully deposited on the steel substrate. The scanning electron microscope, SEM, results showed that the prepared superhydrophobic coatings exhibit micro-nano structures. The wettability results revealed that the values of contact angles, CAs, for Ni-SA and Ni-G-SA coatings are 155.7° and 161.4°, while the values of sliding angles, SAs, for both coatings are 4.0° and 1.0°, respectively. The corrosion resistance, chemical stability, and mechanical abrasion resistance of the Ni-G-SA coating were found to be greater than those of the Ni-SA coating.

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“…In other words, (super)oleophobic underwater surfaces (θ OW > 90°, cos θ OW < 0) tend to be (super)hydrophilic underoil (θ WO < 90°, cos θWO > 0). In addition, (super)hydrophobic surfaces (θ W > 90°, cos θ W < 0) in air are usually (super)oleophilic underwater (SOLUW) due to γ OV cos θ O being more than γ WV cos θ W . ,− Therefore, it is very challenging to construct a surface that is (super)hydrophobic in air, (super)oleophobic underwater (SOBUW), and (super)hydrophobic underoil (SHBUO).…”

Section: Introductionmentioning

confidence: 99%

Simple Method for the Fabrication of Multiple Superwetting Surfaces with Photoresponse

et al. 2021

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There have been many studies on special wetting surfaces, but most of them just stay superlyophobic in air or underwater. In this work, a membrane with photoresponse is fabricated by spraying hybrid particles of silicon and titanium dioxide. Under the combined action of hybrid particles and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane, the prepared membrane is superhydrophobic in air. Because of the presence of titanium dioxide, the membrane can realize the transformation from superoleophilic underwater to superoleophobic underwater through UV irradiation and heating. Surprisingly, the membranes with superoleophobicity underwater are also superhydrophobic underoil. Thanks to this unique wettability transition, the prepared membrane can be applied to emulsion separation and fog harvesting. This is inspiring for the preparation and the multifunctional application of multiphase media superlyophobic surfaces.

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Preparation of superhydrophobic magnetic sawdust for effective oil/water separation

Cited by 49 publications

References 51 publications

Aquananotechnology: oriented-sawdust waste valorization into magnetic nanocellulosic particles for Synozol Red K-HL sorption prospect

Aquananotechnology: oriented-sawdust waste valorization into magnetic nanocellulosic particles for Synozol Red K-HL sorption prospect

Fabrication of eco-friendly graphene-based superhydrophobic coating on steel substrate and its corrosion resistance, chemical and mechanical stability

Simple Method for the Fabrication of Multiple Superwetting Surfaces with Photoresponse

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