Low fouling ultrathin nanocomposite membranes for efficient removal of manganese

The key to make an ideal thin film composite membrane is the reduction of active layer thickness as much as possible to improve the water permeability without adverse effect on selectivity. Hence, ultra-thin nanocomposite membranes were prepared via dip coating method composed of chitosan incorporat...

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Bibliographic Details
Published in:Journal of membrane science 2018-03, Vol.549, p.205-216
Main Authors: Fatemeh Seyedpour, S., Rahimpour, Ahmad, Mohsenian, Hamed, Taherzadeh, Mohammad J.
Format: Article
Language:English
Subjects:
Antimicrobial
Manganese removal
Nanocomposite membrane
Nanometer active layer
Resource Recovery
Resursåtervinning
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Summary:The key to make an ideal thin film composite membrane is the reduction of active layer thickness as much as possible to improve the water permeability without adverse effect on selectivity. Hence, ultra-thin nanocomposite membranes were prepared via dip coating method composed of chitosan incorporated graphene oxide on the surface of polyethersulfone (PES) substrate, followed by ionic crosslinking with sodium tripolyphosphate (TPP). By incorporation of graphene oxide on the chitosan solution, the thickness of selective layer considerably decreased to around 45nm and higher surface hydrophilicity was obtained. The chitosan/graphene oxide ultra-thin modified nanocomposite membrane exhibited state-of-art flux (around 55 LMH) and high manganese removal (around 85%) at low pressure of 3bar. Moreover, these membranes demonstrated up to 98% inhibition in the bacteria proliferation, indicating reasonable antibacterial activity of ultra-thin layer. Besides, the antifouling ability of the nanocomposite membrane increased dramatically, where the flux recovery ratio of 52% and 93% attained for BSA and E. coli, respectively. [Display omitted] •Dip coating method was used to fabricate ultra-thin nanocomposite membrane.•Desired structural and surface properties were achieved by incorporation GO on coated active layer.•Ultra-thin nanocomposite membrane with active layer thickness of 45nm was prepared.•Modified membrane exhibited high permeability and manganese removal from ground water.•Noticeable improvement in anti-fouling/biofouling properties of modified membrane was obtained.
ISSN:0376-7388
1873-3123
1873-3123
DOI:10.1016/j.memsci.2017.12.012