Layer-by-layer construction of CS-CNCs multilayer modified mesh with robust anti-crude-oil-fouling performance for efficient oil/water separation

2021 ◽  
Vol 639 ◽  
pp. 119776
Author(s):  
Yuqi Wang ◽  
Yi He ◽  
Hongjie Li ◽  
Jing Yu ◽  
Liyun Zhang ◽  
...  
Keyword(s):  
Crude Oil ◽  
Layer By Layer ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil Fouling

Chelation Assembly of Cellulose Nanohydrogel onto Flower-Like Structured Foam with Underwater Superoleophobicity for Highly Efficient Oil–Water Separation

NANO ◽  
2021 ◽  
pp. 2150061
Author(s):  
Yuntian Wan ◽  
Xue Lin ◽  
Zhongshuai Chang ◽  
Xiaohui Dai ◽  
Jiangdong Dai
Keyword(s):  
Water Flux ◽  
Separation Performance ◽  
Layer By Layer ◽  
Potential Candidate ◽  
Oily Wastewater ◽  
Water Separation ◽  
Composite Foam ◽  
Oil Water Separation ◽  
Oil Water ◽  
Underwater Superoleophobicity

Currently, with the increasingly serious pollution problem of oily wastewater, it is urgent to develop advanced materials and methods. In this work, a Fe(III)-CMC@Ni(OH)2@Ni composite foam with superhydrophilic and underwater superoleophobicity was fabricated by an in situ growth of flower-like Ni(OH)2 nanoparticles and chelated assembly of Fe(III)-CMC nanohydrogel via a layer-by-layer self assembly using Fe[Formula: see text] ion and carboxymethyl cellulose (CMC). The composite foam could separate various oil/water mixtures and exhibited excellent efficiency over 99%. This foam possessed ultrahigh water flux (220000[Formula: see text]L m[Formula: see text] h[Formula: see text] and better resistant to penetration pressure (1.3[Formula: see text]kPa). After 30 cycles, the oil–water separation performance reduced only 0.5%, but the foam structure was still stable that guarantees a better lifetime. Besides, this composite foam showed anti-fouling, unique durability and excellent corrosion resistance performance. Taking into account all good properties, Fe(III)-CMC@Ni(OH)2@Ni composite foam was expected to be a potential candidate for responding to all kinds of complex oily wastewater conditions.

scholarly journals Refinery processed water treatment via the low energy Direct Contact Membrane Distillation (DCMD)

2019 ◽  
Vol 74 ◽  
pp. 3 ◽  
Author(s):  
Khadije El Kadi ◽  
Isam Janajreh ◽  
Raed Hashaikeh ◽  
Rizwan Ahmed
Keyword(s):  
Water Treatment ◽  
Pore Size ◽  
Mass Flux ◽  
Thermal Efficiency ◽  
Membrane Distillation ◽  
Low Energy ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil Fouling

The amount of refinery water discharged to the environment from oil industry has increased vigorously in current times. Recent research has been focusing on the use of membrane technology for the refinery processed water treatment. Membrane Distillation (MD) is an emerging technology that has been highly marked by its low-energy requirement and high desalination efficiency. However, conventional MD membranes (i.e. PVDF) are not feasible for oil-water separation processes. That is due to the oleo-philic property of the membrane and thus, causes membrane fouling and halts the production of mass flux. An anti-oil-fouling membrane is essential for a successful oil-water separation by MD. Underwater-oleophobic as well as omniphobic are two different approaches in fabricating such membranes. The former approach is based on the asymmetric surface wettability, whereas the latter is attributed to the surface structure that is characterized by having a very large contact angle for all liquids. However, such composite membranes are characterized by their lower porosity, smaller pore size, but with unique surface slippage, in comparable with the conventional PVDF membranes. As such, in this work, high fidelity numerical simulation of DCMD is performed using non-isothermal Computational Fluid Dynamics (CFD) validated model in order to assess the role of the anti-oil-fouling membrane properties on the performance of the DCMD. Results are presented in terms of temperature polarization coefficient, mass flux, latent heat flux, and thermal efficiency. Results show the compromising effect of membrane porosity to 45% reduces the mass flux and thermal efficiency respectively by 68% and 40%, and reduction of pore size to the half (i.e. 50 nm) can cause a reduction by 50.6% in mass flux and 24.18% in thermal efficiency compared to the baseline (i.e. 100 nm). On the other hand, the omniphobic slippage effect leads to a noticeable gain of 16% in DCMD mass flux with slight gain in thermal efficiency. This can maximize mass flux and thermal efficiency to be as much as 50.3 kg/m2 h and 69%, respectively.

A facile surface modification of a PVDF membrane via CaCO3 mineralization for efficient oil/water emulsion separation

2020 ◽  
Vol 44 (48) ◽  
pp. 20999-21006
Author(s):  
Junda Wu ◽  
Atian Xie ◽  
Jin Yang ◽  
Jiangdong Dai ◽  
Chunxiang Li ◽  
...  
Keyword(s):  
Self Assembly ◽  
Layer By Layer ◽  
Assembly Process ◽  
Water Separation ◽  
Water Emulsion ◽  
Pvdf Membrane ◽  
Inorganic Particles ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water

A facile modification of a PVDF membrane using CaCO3 inorganic particles via a layer-by-layer self-assembly process for efficient oil/water separation.

Synthesis of graphene oxide–SiO2 coated mesh film and its properties on oil–water separation and antibacterial activity

2015 ◽  
Vol 73 (5) ◽  
pp. 1098-1103 ◽  
Author(s):  
Jun Liu ◽  
Wanxia He ◽  
Peng Li ◽  
Siying Xia ◽  
Xiaomeng Lü ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Environmental Stability ◽  
Layer By Layer ◽  
Oily Wastewater ◽  
Separation System ◽  
Water Separation ◽  
Silica Coatings ◽  
Oil Water Separation ◽  
Oil Water ◽  
Harsh Conditions

Oil–water separation has recently become a worldwide challenge due to the frequent occurrence of oil spill accidents and increasing industrial oily wastewater. In this work, the multifunctional mesh films with underwater oleophobicity and certain bacteriostatic effects are prepared by layer-by-layer assembly of graphene oxide-silica coatings on stainless steel mesh. The mesh film exhibits excellent environmental stability under a series of harsh conditions. The new, facile and reusable separation system is proposed to achieve deep treatment of oily wastewater, and the oil collection rate can reach over 99%.

Self-cleaning poly(L-dopa)-based coatings with exceptional underwater oil repellency for crude oil/water separation

2020 ◽  
Vol 510 ◽  
pp. 145402 ◽  
Author(s):  
Hao Zhang ◽  
Li Yu ◽  
Xiaohong Ma ◽  
Yapei Peng ◽  
Junqing Hu ◽  
...  
Keyword(s):  
Crude Oil ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Self Cleaning

Covalent layer-by-layer grafting (LBLG) functionalized superhydrophobic stainless steel mesh for oil/water separation

2017 ◽  
Vol 406 ◽  
pp. 150-160 ◽  
Author(s):  
Bin Jiang ◽  
Hongjie Zhang ◽  
Yongli Sun ◽  
Luhong Zhang ◽  
Lidong Xu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Layer By Layer ◽  
Stainless Steel Mesh ◽  
Water Separation ◽  
Steel Mesh ◽  
Oil Water Separation ◽  
Oil Water

Bio-Inspired Anti-Oil-Fouling Chitosan-Coated Mesh for Oil/Water Separation Suitable for Broad pH Range and Hyper-Saline Environments

2013 ◽  
Vol 5 (22) ◽  
pp. 11971-11976 ◽  
Author(s):  
Shiyan Zhang ◽  
Fei Lu ◽  
Lei Tao ◽  
Na Liu ◽  
Changrui Gao ◽  
...  
Keyword(s):  
Water Separation ◽  
Saline Environments ◽  
Oil Water Separation ◽  
Oil Water ◽  
Ph Range ◽  
Oil Fouling
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