Enhancement in membrane performances of a commercial polyamide reverse osmosis membrane via surface coating of polydopamine followed by the grafting of polyethylenimine

RSC Advances ◽  
2015 ◽  
Vol 5 (119) ◽  
pp. 98566-98575 ◽  
Author(s):  
Hao Li ◽  
Lei Peng ◽  
Yunbai Luo ◽  
Ping Yu
Keyword(s):  
Reverse Osmosis ◽  
Surface Coating ◽  
Antibacterial Properties ◽  
Aromatic Polyamide ◽  
Reverse Osmosis Membrane ◽  
Ro Membrane

A commercial aromatic polyamide RO membrane was modified via surface coating of polydopamine followed by the grafting of polyethylenimine. The modification enhanced the chlorine resistance, anti-fouling and antibacterial properties of the membrane.

scholarly journals A novel semi-aromatic polyamide TFC reverse osmosis membrane fabricated from a dendritic molecule of trimesoylamidoamine through a two-step amine-immersion mode

RSC Advances ◽  
2017 ◽  
Vol 7 (62) ◽  
pp. 39127-39137 ◽  
Author(s):  
Hao Wu ◽  
Xiao-Lin Chen ◽  
Xiang Huang ◽  
Hui-Min Ruan ◽  
Yan-Li Ji ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Aromatic Polyamide ◽  
Reverse Osmosis Membrane ◽  
Immersion Method ◽  
Ro Membrane ◽  
Trimesoyl Chloride

In this work, a novel semi-aromatic polyamide RO membrane was fabricated from a new dendritic molecule of trimesoylamidoamine (TMAAM) combined 1,3-diamino-2-propanol (DAP) to react with trimesoyl chloride (TMC) via a new two-step amine immersion method.

scholarly journals Biguanidine functional chitooligosaccharide modified reverse osmosis membrane with improved anti-biofouling property

RSC Advances ◽  
2018 ◽  
Vol 8 (73) ◽  
pp. 41938-41949 ◽  
Author(s):  
Huihui Wang ◽  
Yixuan Zhou ◽  
Yao Wang ◽  
Zhi Wang ◽  
Jixiao Wang
Keyword(s):  
Reverse Osmosis ◽  
Interfacial Polymerization ◽  
Antimicrobial Properties ◽  
Reverse Osmosis Membrane ◽  
Ro Membrane

The COSG-modified RO membrane with excellent anti-adhesive and antimicrobial properties was successfully fabricated by second interfacial polymerization.

scholarly journals Development of Crosslinked Aromatic Polyamide Composite Reverse Osmosis Membrane.

1994 ◽  
pp. 97-107 ◽  
Author(s):  
Masaru KURIHARA ◽  
Tadahiro UEMURA ◽  
Yoshio HIMESHIMA ◽  
Kenji UENO ◽  
Ryoichi BAIRINJI
Keyword(s):  
Reverse Osmosis ◽  
Aromatic Polyamide ◽  
Reverse Osmosis Membrane

The Water Molecules Dynamic Adsorption Performance Study in the Reverse Osmosis Membrane of Aromatic Polyamide Type

2012 ◽  
Vol 512-515 ◽  
pp. 1823-1832
Author(s):  
Ru Feng Xiao ◽  
Jing Yang Liu ◽  
Jian Qiang Zhang
Keyword(s):  
Reverse Osmosis ◽  
Aromatic Polyamide ◽  
Mass Transfer Process ◽  
Dynamic Adsorption ◽  
Water Molecules ◽  
Reverse Osmosis Membrane ◽  
Performance Study ◽  
Diffusion Index ◽  
Diffusion Transfer ◽  
Higher Temperature

In order to understand the mass transfer process of water molecules in the reverse osmosis membrane based on the dynamic adsorption theory and diffusion transfer concept, according to the theory of random walk, the diffusion-adsorption equation is deduced at the beginning of dynamic adsorption around all diffusion regions. It was studied and analyzed the dynamic adsorption behaviour of H2O in reverse osmosis membrane of polyamide in the experiment, and the influence of the different temperature to the dynamic adsorption of the reverse osmosis membrane on the early stages was discussed, and calculated the abnormal diffusion index dw. The results showed that the water molecules in this aromatic polyamide type reverse osmosis membrane have the behaviour of abnormal dynamic adsorption, and the higher temperature was, the smaller the abnormal diffusion index dw was.

Study on hypochlorite degradation of aromatic polyamide reverse osmosis membrane

2007 ◽  
Vol 300 (1-2) ◽  
pp. 165-171 ◽  
Author(s):  
Guo-Dong Kang ◽  
Cong-Jie Gao ◽  
Wei-Dong Chen ◽  
Xing-Ming Jie ◽  
Yi-Ming Cao ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Aromatic Polyamide ◽  
Reverse Osmosis Membrane

Comparative Study on the Treatment of Biologically Treated Textile Effluent by Nanofiltration and Reverse Osmosis for Water Reuse

2012 ◽  
Vol 441 ◽  
pp. 584-588
Author(s):  
San Chuan Yu ◽  
Zhi Wen Chen ◽  
Mei Hong Liu ◽  
Jing Wei Zhao
Keyword(s):  
Reverse Osmosis ◽  
Water Reuse ◽  
Cross Flow ◽  
Water Shortage ◽  
Nanofiltration Membrane ◽  
Reverse Osmosis Membrane ◽  
Permeate Flux ◽  
Flux Decline ◽  
Salinity Reduction ◽  
Ro Membrane

In view of the water shortage, the increasingly severe regulations as well as the release thresholds, it is becoming increasingly necessary to reuse the textile effluents. This work concerned the treatment of textile plant effluent after conventional biological processing by membrane technology for water reuse. Desal5 DK nanofiltration (NF) membrane and BW30 reverse osmosis (RO) membrane were investigated in this study in terms of COD and color removal, salinity reduction as well as permeate flux through cross-flow permeation tests. The results showed that the Desal5 DK nanofiltration membrane exhibited higher stabilized water permeability and flux decline than the reverse osmosis membrane because of its higher porosity and tendency towards fouling. The BW30 reverse osmosis membrane reduced salinity to a great extent than the Desal5 DK nanofiltration membrane. While the nanofiltration membrane exhibited better COD removal efficiency compared to the RO membrane, possibly due to its sieving removal mechanism. The treated water with good enough quality could be recycled back into the process, thereby offering economical benefits by reducing the water consumption and wastewater treatment cost.

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