Cellulose acetate membrane embedded with graphene oxide-silver nanocomposites and its ability to suppress microbial proliferation

Cellulose ◽  
2016 ◽  
Vol 24 (2) ◽  
pp. 781-796 ◽  
Author(s):  
Andreia Fonseca de Faria ◽  
Ana Carolina Mazarin de Moraes ◽  
Patricia Fernanda Andrade ◽  
Douglas Soares da Silva ◽  
Maria do Carmo Gonçalves ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cellulose Acetate ◽  
Cellulose Acetate Membrane ◽  
Silver Nanocomposites ◽  
Microbial Proliferation

Impact of graphene/graphene oxide on the mechanical properties of cellulose acetate membrane and promising natural seawater desalination

2019 ◽  
Vol 39 (9) ◽  
pp. 794-804
Author(s):  
Nahla Ismail ◽  
Ayman El-Gendi ◽  
Hisham Essawy ◽  
Lara Nezam El-Din ◽  
Kamal Abed ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Cellulose Acetate ◽  
Pure Water ◽  
Natural Seawater ◽  
Cellulose Acetate Membrane ◽  
Permeate Flux ◽  
Salt Rejection ◽  
Wide Range ◽  
Simulated Seawater

Abstract New formulations of cellulose acetate (CA) membrane with graphene (G)/graphene oxide (GO) are suggested and investigated in the present work. This study is intended to find a wide range of conditions for fabricating CA membranes in the presence of some additions of graphene (G), and graphene oxide (GO). The membrane is prepared by phase inversion process. Microscopic investigations for graphene (G), graphene oxide (GO), and prepared membrane were performed by high-resolution transmission electron microscope (HRTEM) and scanning electron microscopy (SEM). The mechanical properties of prepared membranes are determined and evaluated. Permeation tests were performed using natural seawater and simulated seawater to check the prepared membrane performance. The results presented that the permeate flux of M25% CA membranes containing 0.01 wt.% G is the highest flux (57–74 l/m2 h) compared with the neat CA membrane, and the 0.01 wt.% GO-based membranes, while the GO-based membranes were comparable as the neat CA membrane at operating pressures (30–35 bar) and with a feed of 35 g/l NaCl solution. The results showed a remarkable salt rejection of simulated seawater of 95%, and natural seawater with a feed from the Mediterranean Sea displayed 90% salt rejection and accepted pure water flux as well.

Effect of the structure of cellulose acetate membranes on their permeability, electrical conductivity and rejection

1990 ◽  
Vol 55 (12) ◽  
pp. 2933-2939 ◽  
Author(s):  
Hans-Hartmut Schwarz ◽  
Vlastimil Kůdela ◽  
Klaus Richau
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Water Flux ◽  
Cellulose Acetate Membrane ◽  
Structure Parameters ◽  
Dc Electrical Conductivity ◽  
Cellulose Acetate Membranes

Ultrafiltration cellulose acetate membrane can be transformed by annealing into reverse osmosis membranes (RO type). Annealing brings about changes in structural properties of the membranes, accompanied by changes in their permeability behaviour and electrical properties. Correlations between structure parameters and electrochemical properties are shown for the temperature range 20-90 °C. Relations have been derived which explain the role played by the dc electrical conductivity in the characterization of rejection ability of the membranes in the reverse osmosis, i.e. rRO = (1 + exp (A-B))-1, where exp A and exp B are statistically significant correlation functions of electrical conductivity and salt permeation, or of electrical conductivity and water flux through the membrane, respectively.

Alginate fouling reduction of functionalized carbon nanotube blended cellulose acetate membrane in forward osmosis

Chemosphere ◽  
2015 ◽  
Vol 136 ◽  
pp. 204-210 ◽  
Author(s):  
Hyeon-gyu Choi ◽  
Moon Son ◽  
SangHyeon Yoon ◽  
Evrim Celik ◽  
Seoktae Kang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Cellulose Acetate ◽  
Forward Osmosis ◽  
Cellulose Acetate Membrane ◽  
Functionalized Carbon Nanotube ◽  
Fouling Reduction
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