scholarly journals A flexible biomimetic superhydrophobic and superoleophilic 3D macroporous polymer-based robust network for the efficient separation of oil-contaminated water

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5088-5097 ◽  
Author(s):  
Tawfik A. Saleh ◽  
Nadeem Baig ◽  
Fahd I. Alghunaimi ◽  
Norah W. Aljuryyed
Keyword(s):  
Contaminated Water ◽  
Water Separation ◽  
Efficient Separation ◽  
Robust Network

Superhydrophobic polyurethane for oil and water separation.

scholarly journals An anti-fouling poly(vinylidene fluoride) hybrid membrane blended with functionalized ZrO2 nanoparticles for efficient oil/water separation

RSC Advances ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 5262-5271 ◽  
Author(s):  
Xiang Shen ◽  
Tiande Xie ◽  
Jiangang Wang ◽  
Peng Liu ◽  
Fan Wang
Keyword(s):  
Vinylidene Fluoride ◽  
Hybrid Membrane ◽  
Zro2 Nanoparticles ◽  
Water Mixture ◽  
Water Separation ◽  
Grafting Polymerization ◽  
Efficient Separation ◽  
Poly Vinylidene Fluoride ◽  
Oil Water Separation ◽  
Oil Water

Functionalized nanoparticle of ZrO2 grafted with poly(N-acryloylmorpholine) was synthesized via radical grafting polymerization. The nanoparticle was directly blended with PVDF to prepare hybrid membrane. The efficient separation of oil/water mixture is established.

scholarly journals Potential Efficient Separation of Oil from Bilgewater and Kitchen Wastewater by Fractional Freezing Process

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 685
Author(s):  
Siti Nor Adibah Mustapha ◽  
Nurul Aini Amran ◽  
Intan Lyana Roslan ◽  
Rubini Chandra Segaran ◽  
Shafirah Samsuri
Keyword(s):  
Crystal Growth ◽  
Separation Process ◽  
Process Efficiency ◽  
Coolant Temperature ◽  
Oily Wastewater ◽  
Water Separation ◽  
Efficient Separation ◽  
Stirring Rate ◽  
Oil Water Separation ◽  
Oil Water

Oily wastewater discharge to water bodies can have many negative consequences, especially on the marine ecological environment. Although there are numerous techniques for treating oily wastewater, this paper aims to introduce and evaluate the potential of the fractional freezing (FF) process as a new oil–water separation technique to overcome the several weaknesses found in the conventional oil–water separation methods. FF separates two liquid compounds based on their freezing point difference. In this study, two oily wastewater samples were used: oily bilgewater and oily kitchen wastewater. The effects of coolant temperature, freezing time, and stirring rate on the FF process efficiency were studied, and the significance of the data was supported by statistical analysis. The results show that a low coolant temperature is essential for allowing crystal nucleation formation and inducing crystal growth for an efficient separation process. However, the higher crystal growth rate that occurs at an even lower temperature might entrap the impurities inside the growing crystal. Consequently, continuing the crystallization for a longer time may yield a less efficient separation process. Furthermore, a too high stirring rate will rupture the solid formation, hence reducing the process efficiency. The final values of oil/grease and free fatty acids (FFA) obtained after the FF process of both samples were found to comply with the standard permitted by the International Maritime Organization (IMO) and Palm Oil Refiners Association of Malaysia (PORAM). Moreover, the p-values obtained for both of the above-mentioned samples were below 0.05 for all experiments. It can be concluded that this method has the potential to separate oil from the oily bilgewater and kitchen wastewater.

Facile preparation of a superamphiphilic nitrocellulose membrane enabling on-demand and energy-efficient separation oil/water mixtures and emulsions by prewetting

2021 ◽  
Author(s):  
Rong Zhang ◽  
Zhiguang Guo
Keyword(s):  
Energy Efficient ◽  
Nitrocellulose Membrane ◽  
Water Separation ◽  
Efficient Separation ◽  
On Demand ◽  
Oil Water Separation ◽  
Oil Water ◽  
Facile Preparation

The membrane with superamphiphilicity presents many advantages in various oil/water separation applications due to their switchable wettability by prewetting. However, it is still a great challenge to switch between two...

scholarly journals Reduced graphene oxide-coated microfibers for oil–water separation

2019 ◽  
Vol 6 (11) ◽  
pp. 3215-3224 ◽  
Author(s):  
Gianni Ferrero ◽  
Mikael Sandgren Bock ◽  
Erling Halfdan Stenby ◽  
Chengyi Hou ◽  
Jingdong Zhang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Marine Environment ◽  
Water Separation ◽  
Efficient Separation ◽  
Reduced Graphene ◽  
Oil Water Separation ◽  
Oil Water

Reduced graphene oxide (rGO)-coated microfibers demonstrating the efficient separation of oil–water mixtures and minimal release of rGO in the marine environment.

Vertically oriented nanoporous block copolymer membranes for oil/water separation and filtration

Soft Matter ◽  
2020 ◽  
Vol 16 (42) ◽  
pp. 9648-9654 ◽  
Author(s):  
Yan Luo ◽  
Xiaoteng Wang ◽  
Ren Zhang ◽  
Maninderjeet Singh ◽  
Ali Ammar ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Aqueous Solutions ◽  
Contaminated Water ◽  
Water Separation ◽  
Nanoporous Membrane ◽  
Oil Water Separation ◽  
Oil Water

Vertically oriented block copolymer nanocylinders (left) and after etching to form nanoporous membrane (right), for separation of oil from water and filtration of aqueous solutions and dispersions to treat waste and contaminated water.

scholarly journals High-flux underwater superoleophobic hybrid membranes for effective oil–water separation from oil-contaminated water

RSC Advances ◽  
2017 ◽  
Vol 7 (15) ◽  
pp. 9051-9056 ◽  
Author(s):  
Minxiang Zeng ◽  
Baoliang Peng ◽  
Carlos Ybanez ◽  
Nian Wei Tan ◽  
Ehab Abo Deeb ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Separation Efficiency ◽  
Contaminated Water ◽  
Hybrid Membranes ◽  
High Flux ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Filter Papers ◽  
Tolylene Diisocyanate

The pristine filter papers were crosslinked with polyvinyl alcohol by tolylene diisocyanate, leading to a superoleophobic surface which enables excellent oil–water separation efficiency.

scholarly journals Adsorption and superficial transport of oil on biological and bionic superhydrophobic surfaces: a novel technique for oil–water separation

2020 ◽  
Vol 378 (2167) ◽  
pp. 20190447
Author(s):  
W. Barthlott ◽  
M. Moosmann ◽  
I. Noll ◽  
M. Akdere ◽  
J. Wagner ◽  
...  
Keyword(s):  
Oil Spills ◽  
Superhydrophobic Surfaces ◽  
Contaminated Water ◽  
Theme Issue ◽  
External Energy ◽  
Water Separation ◽  
Lotus Effect ◽  
Oil Water Separation ◽  
Air Layers ◽  
Oil Water

Superhydrophobicity is a physical feature of surfaces occurring in many organisms and has been applied (e.g. lotus effect) in bionic technical applications. Some aquatic species are able to maintain persistent air layers under water ( Salvinia effect) and thus become increasingly interesting for drag reduction and other ‘bioinspired’ applications. However, another feature of superhydrophobic surfaces, i.e. the adsorption (not absorption) and subsequent superficial transportation and desorption capability for oil, has been neglected. Intense research is currently being carried out on oil-absorbing bulk materials like sponges, focusing on oleophilic surfaces and meshes to build membranes for oil–water separation. This requires an active pumping of oil–water mixtures onto or through the surface. Here, we present a novel passive, self-driven technology to remove oil from water surfaces. The oil is adsorbed onto a superhydrophobic material (e.g. textiles) and transported on its surface. Vertical and horizontal transportation is possible above or below the oil-contaminated water surface. The transfer in a bioinspired novel bionic oil adsorber is described. The oil is transported into a container and thus removed from the surface. Prototypes have proven to be an efficient and environmentally friendly technology to clean oil spills from water without chemicals or external energy supply. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 3)’.

scholarly journals Efficient separation of immiscible oil/water mixtures using a perforated lotus leaf

2019 ◽  
Vol 21 (24) ◽  
pp. 6579-6584 ◽  
Author(s):  
Chunhui Zhang ◽  
Yuheng Zhang ◽  
Xiao Xiao ◽  
Guoliang Liu ◽  
Zhe Xu ◽  
...  
Keyword(s):  
Environmentally Benign ◽  
Water Separation ◽  
Lotus Leaf ◽  
Efficient Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Leaf P

After mechanical punching, a lotus leaf, which is easily obtained and eco-friendly, shows great applicability for oil/water separation in an environmentally benign manner.

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