Superwettable Neuron-Inspired Polyurethane Nanofibrous Materials with Efficient Selective Separation Performance Towards Various Fluids

2021 ◽  
Author(s):  
Mengyuan Li ◽  
Xingyou Hu ◽  
Liang Jiang ◽  
Guohui Gao ◽  
Xueqin Wang ◽  
...  
Keyword(s):  
Selective Separation ◽  
Separation Performance

Multilevel/hierarchical nanocomposite imprinted regenerated cellulose membranes for high-efficiency separation: A selective recognition method with Au/PDA-loaded surface

2021 ◽  
Author(s):  
Ming Yan ◽  
Yilin Wu ◽  
Rongxin Lin ◽  
Faguang Ma ◽  
Zhongyi Jiang
Keyword(s):  
Molecular Imprinting ◽  
High Efficiency ◽  
Selective Separation ◽  
Selective Recognition ◽  
Regenerated Cellulose ◽  
Separation Performance ◽  
Recognition Method ◽  
Membrane Materials ◽  
Loaded Surface ◽  
Cellulose Membranes

Although many researchers have done lots of studies on improving the selective separation performance of membrane materials, conceptions and applications of membrane-based molecular imprinting separation&recognition with both high permselectivity and...

Liquid-like CNT/SiO2 nanoparticle organic hybrid materials as fillers in mixed matrix composite membranes for enhanced CO2-selective separation

2019 ◽  
Vol 43 (30) ◽  
pp. 11949-11958 ◽  
Author(s):  
Dechao Wang ◽  
Yaping Zheng ◽  
Dongdong Yao ◽  
Zhiyuan Yang ◽  
Yangyang Xin ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Matrix Composite ◽  
Composite Membranes ◽  
Selective Separation ◽  
Mixed Matrix Membranes ◽  
Separation Performance ◽  
Mixed Matrix ◽  
Organic Hybrid ◽  
Sio2 Nanoparticle ◽  
Core Composition

Liquid-like nanoparticle organic hybrid materials with core/canopy/corona were used as fillers in Pebax-1657 matrix to fabricate mixed-matrix membranes. The effect of composite core composition on CO2/N2 separation performance was systematically investigated.

scholarly journals Talc Flotation—An Overview

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 662
Author(s):  
July Ann Bazar ◽  
Milad Rahimi ◽  
Siavash Fathinia ◽  
Mohammad Jafari ◽  
Vitalis Chipakwe ◽  
...  
Keyword(s):  
Contact Angles ◽  
Selective Separation ◽  
Separation Performance ◽  
Gangue Mineral ◽  
Thermal Treatments ◽  
High Chemical ◽  
Factors Affecting ◽  
Wide Ph Range ◽  
Ph Range ◽  
High Chemical Stability

Talc is a naturally hydrophobic gangue mineral in most sulfide ores. However, talc has vast applications in the cosmetics, paper, and paint industries due to its high chemical stability, and its demand continues to grow. Since flotation is the most effective beneficiation technique for upgrading sulfides, the high hydrophobicity of talc has made its selective separation challenging. This paper explored the different properties of talc and the different factors that affect its flotation separation performance as a proven versatile beneficiation technique. Surface properties, zeta potential measurements, contact angles, and other factors affecting the talc flotation efficiency were discussed in detail. It was observed that the surface face/edge ratio (particle size) has a direct relationship with the level of talc hydrophobicity. Talc surfaces are negatively charged in a wide pH range (pH 2–12). Different depressants have already been studied; however, most of them showed low selectivity. The addition of ions such as Ca2+ could enhance talc depression. Pretreatment methods such as ultrasonic and thermal treatments were reported to decrease the talc floatability. It was demonstrated that the development of new selective depressants or pretreatment options for talc flotation requires attention in future investigations to improve its selective separation.

scholarly journals Selective Separation of Acetic and Hexanoic Acids across Polymer Inclusion Membrane with Ionic Liquids as Carrier

2019 ◽  
Vol 20 (16) ◽  
pp. 3915 ◽  
Author(s):  
Bao-Ying Wang ◽  
Na Zhang ◽  
Zhen-Yu Li ◽  
Qiao-Lin Lang ◽  
Bing-Hua Yan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Quaternary Ammonium ◽  
Volatile Fatty Acids ◽  
Separation Efficiency ◽  
Feed Solution ◽  
Selective Separation ◽  
Hexanoic Acid ◽  
Separation Performance ◽  
Initial Ph ◽  
Hcl Concentration

This paper first reports on the selective separation of volatile fatty acids (VFAs) (acetic and hexanoic acids) using polymer inclusion membranes (PIMs) containing quaternary ammonium and phosphonium ionic liquids (ILs) as the carrier. The affecting parameters such as IL content, VFA concentration, and the initial pH of the feed solution as well as the type and concentration of the stripping solution were investigated. PIMs performed a much higher selective separation performance toward hexanoic acid. The optimal PIM composed of 60 wt% quaternary ammonium IL with the permeability coefficients for acetic and hexanoic acid of 0.72 and 4.38 µm s−1, respectively, was determined. The purity of hexanoic acid obtained in the stripping solution increased with an increase in the VFA concentration of the feed solution and decreasing HCl concentration of the stripping solution. The use of Na2CO3 as the stripping solution and the involvement of the electrodialysis process could dramatically enhance the transport efficiency of both VFAs, but the separation efficiency decreased sharply. Furthermore, a coordinating mechanism containing hydrogen bonding and ion exchange for VFA transport was demonstrated. The highest purity of hexanoic acid (89.3%) in the stripping solution demonstrated that this PIM technology has good prospects for the separation and recovery of VFAs from aqueous solutions.

Field testing CFD-based predictions of storage chamber gross solids separation efficiency

1999 ◽  
Vol 39 (9) ◽  
pp. 161-168 ◽  
Author(s):  
Virginia R. Stovin ◽  
Adrian J. Saul ◽  
Andrew Drinkwater ◽  
Ian Clifforde
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Settling Velocity ◽  
Separation Efficiency ◽  
Flow Patterns ◽  
Total Efficiency ◽  
Separation Performance ◽  
Storage Chamber ◽  
Solids Separation ◽  
Simulated Flow

The use of computational fluid dynamics-based techniques for predicting the gross solids and finely suspended solids separation performance of structures within urban drainage systems is becoming well established. This paper compares the result of simulated flow patterns and gross solids separation predictions with field measurements made in a full size storage chamber. The gross solids retention efficiency was measured for six different storage chambers in the field and simulations of these chambers were undertaken using the Fluent computational fluid dynamics software. Differences between the observed and simulated flow patterns are discussed. The simulated flow fields were used to estimate chamber efficiency using particle tracking. Efficiency results are presented as efficiency cusps, with efficiency plotted as a function of settling velocity. The cusp represents a range of efficiency values, and approaches to the estimation of an overall efficiency value from these cusps are briefly discussed. Estimates of total efficiency based on the observed settling velocity distribution differed from the measured values by an average of ±17%. However, estimates of steady flow efficiency were consistently higher than the observed values. The simulated efficiencies agreed with the field observations in identifying the most efficient configuration.

Selective separation of yttrium from rare earth elements by ion interaction chromatography. Analytical and larger scale applications

2019 ◽  
Vol 55 (7) ◽  
pp. 1364-1379 ◽  
Author(s):  
Rajmund S. Dybczyński ◽  
Marta Pyszynska ◽  
Krzysztof Kulisa ◽  
Anna Bojanowska-Czajka
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Selective Separation
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