scholarly journals Construction of superhydrophilic hierarchical polyacrylonitrile nanofiber membranes by in situ asymmetry engineering for unprecedently ultrafast oil–water emulsion separation

2020 ◽  
Vol 8 (33) ◽  
pp. 16933-16942 ◽  
Author(s):  
XiQuan Cheng ◽  
Zekun Sun ◽  
Xiaobin Yang ◽  
Zhixing Li ◽  
Yingjie Zhang ◽  
...  
Keyword(s):  
Recovery Rate ◽  
Separation Efficiency ◽  
Functional Networks ◽  
Water Emulsion ◽  
Pore Structures ◽  
Emulsion Separation ◽  
Nanofiber Membranes ◽  
Oil Water ◽  
Pan Nanofiber

With multi-hydrophilic functional networks, asymmetric PAN nanofiber membranes with finely tailored pore structures and hydrophilicity are constructed and show high permeance 22 000 L m−2 h−1 bar−1, separation efficiency 99.2% and flux recovery rate 98%.

Photo-Fenton self-cleaning membranes with robust flux recovery for an efficient oil/water emulsion separation

2019 ◽  
Vol 7 (14) ◽  
pp. 8491-8502 ◽  
Author(s):  
Atian Xie ◽  
Jiuyun Cui ◽  
Jin Yang ◽  
Yangyang Chen ◽  
Jiangdong Dai ◽  
...  
Keyword(s):  
Complex Assembly ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water ◽  
Self Cleaning

Photo-Fenton self-cleaning membranes have been developed by TA-Fe(iii) complex assembly, followed by the in situ mineralization of β-FeOOH for efficient oil/water emulsions separation.

A cellulose sponge with robust superhydrophilicity and under-water superoleophobicity for highly effective oil/water separation

2015 ◽  
Vol 17 (5) ◽  
pp. 3093-3099 ◽  
Author(s):  
Gang Wang ◽  
Yi He ◽  
He Wang ◽  
Lin Zhang ◽  
Quanyao Yu ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Water Separation ◽  
Water Emulsion ◽  
Cellulose Sponge ◽  
Highly Effective ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water

A cellulose sponge with properties of superhydrophilicity and under-water superoleophobicity gives 99.94% separation efficiency in oil–water emulsion separation.

scholarly journals Investigation of outlet diameter effect on emulsion separation efficiency in rectangular separators

2021 ◽  
Vol 24 (6) ◽  
pp. 1232-1242
Author(s):  
I. N. Madyshev ◽  
V. E. Zinurov ◽  
A. V. Dmitriev ◽  
Xuan Vinh Dang ◽  
G. R. Badretdinova
Keyword(s):  
Separation Efficiency ◽  
Experimental Studies ◽  
Water System ◽  
Complete Separation ◽  
Correct Selection ◽  
Technological Parameters ◽  
Two Phase ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water

The purpose of the study is to conduct experimental studies of oil -water emulsion separation in a rectangular separator in the range of velocities along the device working area from 1.43 to 2.5 m/s. The efficiency of emulsion separation is determined by an experimental method based on measuring the density of a two-phase liquid, provided that the density of each component of the mixture is previously determined. The authors propose to use a device with U-shaped elements to increase its performance when separating oil-water emulsions. The device under study including two rows of U-shaped elements consists of one complete separation stage. The authors have conducted experimental studies of the device with U-shaped elements on the "oil-water" system, during which the efficiency of emulsion separation was evaluated. It was detemined that the proposed device provides the highest efficiency of emulsion separation of 68% when the diameter of the holes intended for the exit of the heavy phase equals to 2.5 mm in the range of emulsion velocities from 1.43 to 2.5 m/s. The conducted experimental studies will allow to use a turbulence model for calculation in the programs like Ansys Fluent or FlowVision, which will most adequately describe the separation process of similar emulsions. The experiments have proved the possibility of obtaining high values of efficiency. Therefore, the correct selection of technological parameters (average flow rate, concentration) and the size of the characteristic elements of the proposed device will allow to specify the design of a rectangular separator, for example, to calculate the number of stages to achieve the required separation efficiency or to determine the size of the separation elements.

scholarly journals Cellulosic Paper-Based Membrane for Oil-Water Separation Enabled by Papermaking and in-Situ Gelation

2021 ◽  
Author(s):  
Decheng Gao ◽  
Yucheng Feng ◽  
Xiao Zhang ◽  
Shuying Wu ◽  
Fei Yang
Keyword(s):  
Separation Efficiency ◽  
Scale Production ◽  
Wet Strength ◽  
Water Separation ◽  
Water Emulsion ◽  
In Situ Gelation ◽  
High Efficient ◽  
Oil Water Separation ◽  
Oil Water

Abstract While has obvious scientific significance, the oil-water separation membranes are argued at production and disuse, mainly ascribed to the complex processes and non-biodegradation. Papermaking has great potential in the field of oil/water separation. The pulp refining of papermaking can improve the properties of pulp to improve the properties of paper substrate, which play an important role in oil-water separation. Due to the separation process was conducted under water, the wet strength of paper-based membrane was improved by micro-dissolved and in-situ gelation. The strength, oil-water separation efficiency and flux of membranes were explored under different beating degrees and regenerated conditions. The separation for oil-water emulsion of membranes can keep more than 98.5%, and the flux can be adjusted by pulp refining and in-situ gelation. The membranes are expected to be a low-cost, high-efficient for oily wastewater purification. This work demonstrates a new idea for the development of oil-water separation and papermaking, which provides a feasible strategy for large scale production of fully biodegradable oil-water separation membrane.

scholarly journals Mussel-Inspired Fabrication of PDA@PAN Electrospun Nanofibrous Membrane for Oil-in-Water Emulsion Separation

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3434
Author(s):  
Haodong Zhao ◽  
Yali He ◽  
Zhihua Wang ◽  
Yanbao Zhao ◽  
Lei Sun
Keyword(s):  
Separation Efficiency ◽  
Low Cost ◽  
Nanofibrous Membrane ◽  
Water Separation ◽  
Water Emulsion ◽  
Oil In Water ◽  
Emulsion Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil In Water Emulsion

Emulsified oily wastewater threatens human health seriously, and traditional technologies are unable to separate emulsion containing small sized oil droplets. Currently, oil–water emulsions are usually separated by special wettability membranes, and researchers are devoted to developing membranes with excellent antifouling performance and high permeability. Herein, a novel, simple and low-cost method has been proposed for the separation of emulsion containing surfactants. Polyacrylonitrile (PAN) nanofibers were prepared via electrospinning and then coated by polydopamine (PDA) by using self-polymerization reactions in aqueous solutions. The morphology, structure and oil-in-water emulsion separation properties of the as-prepared PDA@PAN nanofibrous membrane were tested. The results show that PDA@PAN nanofibrous membrane has superhydrophilicity and almost no adhesion to crude oil in water, which exhibits excellent oil–water separation ability. The permeability and separation efficiency of n-hexane/water emulsion are up to 1570 Lm−2 h−1 bar−1 and 96.1%, respectively. Furthermore, after 10 cycles of separation, the permeability and separation efficiency values do not decrease significantly, indicating its good recycling performance. This research develops a new method for preparing oil–water separation membrane, which can be used for efficient oil-in-water emulsion separation.

An ultrathin in situ silicification layer developed by an electrostatic attraction force strategy for ultrahigh-performance oil–water emulsion separation

2019 ◽  
Vol 7 (42) ◽  
pp. 24569-24582 ◽  
Author(s):  
Lei Zhang ◽  
Yuqing Lin ◽  
Haochen Wu ◽  
Liang Cheng ◽  
Yuchen Sun ◽  
...  
Keyword(s):  
Electrostatic Attraction ◽  
Attraction Force ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water

Development of SiO2-d-PK membrane via electrostatic attraction forced strategy for oil–water emulsions separation.

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