scholarly journals Removal of Dyes Using Graphene Oxide (GO) Mixed Matrix Membranes

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 366
Author(s):  
Rana J. Kadhim ◽  
Faris H. Al-Ani ◽  
Muayad Al-shaeli ◽  
Qusay F. Alsalhy ◽  
Alberto Figoli
Keyword(s):  
Graphene Oxide ◽  
Rejection Rate ◽  
Mixed Matrix Membranes ◽  
Permeation Flux ◽  
Mixed Matrix ◽  
Term Operation ◽  
Water Permeation ◽  
Pes Membrane ◽  
Matrix Membranes

The application of membrane technology to remove pollutant dyes in industrial wastewater is a significant development today. The modification of membranes to improve their properties has been shown to improve the permeation flux and removal efficiency of the membrane. Therefore, in this work, graphene oxide nanoparticles (GO-NPs) were used to modify the polyethersulfone (PES) membrane and prepare mixed matrix membranes (MMMs). This research is dedicated to using two types of very toxic dyes (Acid Black and Rose Bengal) to study the effect of GO on PES performance. The performance and antifouling properties of the new modified membrane were studied using the following: FTIR, SEM, AFM, water permeation flux, dye removal and fouling, and by investigating the influence of GO-NPs on the structure. After adding 0.5 wt% of GO, the contact angle was the lowest (39.21°) and the permeable flux of the membrane was the highest. The performance of the ultrafiltration (UF) membrane displayed a rejection rate higher than 99% for both dyes. The membranes showed the highest antifouling property at a GO concentration of 0.5 wt%. The long-term operation of the membrane fabricated from 0.5 wt% GO using two dyes improved greatly over 26 d from 14 d for the control membrane, therefore higher flux can be preserved.

Long-Term Stable Metal Organic Framework (MOF) Based Mixed Matrix Membranes for Ultrafiltration

2020 ◽  
Author(s):  
Muayad Al-shaeli ◽  
Stefan J. D. Smith ◽  
Shanxue Jiang ◽  
Huanting Wang ◽  
Kaisong Zhang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Mixed Matrix Membranes ◽  
Recovery Ratio ◽  
Mixed Matrix ◽  
Water Contact ◽  
Membrane Performance ◽  
Metal Organic ◽  
Matrix Membranes

<p>In this study, novel <a>mixed matrix polyethersulfone (PES) membranes</a> were synthesized by using two different kinds of metal organic frameworks (MOFs), namely UiO-66 and UiO-66-NH<sub>2</sub>. The composite membranes were characterised by SEM, EDX, FTIR, PXRD, water contact angle, porosity, pore size, etc. Membrane performance was investigated by water permeation flux, flux recovery ratio, fouling resistance and anti-fouling performance. The stability test was also conducted for the prepared mixed matrix membranes. A higher reduction in the water contact angle was observed after adding both MOFs to the PES and sulfonated PES membranes compared to pristine PES membranes. An enhancement in membrane performance was observed by embedding the MOF into PES membrane matrix, which may be attributed to the super-hydrophilic porous structure of UiO-66-NH<sub>2</sub> nanoparticles and hydrophilic structure of UiO-66 nanoparticles that could accelerate the exchange rate between solvent and non-solvent during the phase inversion process. By adding the MOFs into PES matrix, the flux recovery ratio was increased greatly (more than 99% for most mixed matrix membranes). The mixed matrix membranes showed higher resistance to protein adsorption compared to pristine PES membranes. After immersing the membranes in water for 3 months, 6 months and 12 months, both MOFs were stable and retained their structure. This study indicates that UiO-66 and UiO-66-NH<sub>2</sub> are great candidates for designing long-term stable mixed matrix membranes with higher anti-fouling performance.</p>

Effective gas separation through graphene oxide containing mixed matrix membranes

2018 ◽  
Vol 135 (21) ◽  
pp. 46271 ◽  
Author(s):  
Elahe Ahmadi Feijani ◽  
Ahmad Tavassoli ◽  
Hossein Mahdavi ◽  
Hossein Molavi
Keyword(s):  
Graphene Oxide ◽  
Gas Separation ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Matrix Membranes

scholarly journals Pebax/ionic liquid modified graphene oxide mixed matrix membranes for enhanced CO2 capture

2018 ◽  
Vol 565 ◽  
pp. 370-379 ◽  
Author(s):  
Guoji Huang ◽  
Ali Pournaghshband Isfahani ◽  
Ansori Muchtar ◽  
Kento Sakurai ◽  
Binod Babu Shrestha ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Co2 Capture ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Matrix Membranes

scholarly journals Synthesis of graphene oxide/polyimide mixed matrix membranes for desalination

RSC Advances ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 2211-2217 ◽  
Author(s):  
Bo Feng ◽  
Kai Xu ◽  
Aisheng Huang
Keyword(s):  
Graphene Oxide ◽  
Water Flux ◽  
High Water ◽  
High Salt ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Salt Rejection ◽  
Matrix Membranes

Graphene oxide (GO) was incorporated into polyimide (PI) to fabricate GO/PI mixed matrix membranes (MMMs), which show a high water flux (36.1 kg m−2 h−1) and a high salt rejection (99.9%) for desalination of 3.5 wt% seawater at 90 °C.

Metal-organic framework/graphene oxide composite fillers in mixed-matrix membranes for CO2 separation

2018 ◽  
Vol 212 ◽  
pp. 513-522 ◽  
Author(s):  
Stavroula Anastasiou ◽  
Nidhika Bhoria ◽  
Jeewan Pokhrel ◽  
K. Suresh Kumar Reddy ◽  
C. Srinivasakannan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Organic Framework ◽  
Mixed Matrix Membranes ◽  
Co2 Separation ◽  
Mixed Matrix ◽  
Oxide Composite ◽  
Metal Organic ◽  
Organic Framework ◽  
Matrix Membranes
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