Show simple item record

AuthorNnadiekwe, Chidera C.
AuthorAbdulazeez, Ismail
AuthorMatin, Asif
AuthorKhaled, Mazen M.
AuthorKhan, Majad
AuthorAnand, Deepak
AuthorAhmad, Irshad
Available date2023-05-17T08:14:48Z
Publication Date2021-05-14
Publication NameACS ES and T Water
Identifierhttp://dx.doi.org/10.1021/acsestwater.0c00168
CitationNnadiekwe, C. C., Abdulazeez, I., Matin, A., Khaled, M. M., Khan, M., Anand, D., & Ahmad, I. (2021). Enhanced filtration characteristics and reduced bacterial attachment for reverse osmosis membranes modified by a facile method. ACS ES&T Water, 1(5), 1136-1144.‏
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85121712953&origin=inward
URIhttp://hdl.handle.net/10576/42837
AbstractIn this study, we report the facile surface modification of reverse osmosis (RO) membranes for improved filtration as well as bacterial resistance properties. Thin films of two silanes, 3-aminopropyltriethoxysilane (3-APS) and 6-amino-hexylaminotriethoxysilane (6-AHAS), were dip-coated on commercial RO membranes, and their nitrogen atoms subsequently quaternized. Analyses of the modified membranes via scanning electron microscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy confirmed the “peak and valley” morphology of the original membrane, silane deposition, and N quaternization, respectively. The original membrane showed a water contact angle of ∼90−100° that was significantly decreased after silane coating: 63° for 3-APS and ∼52° for 6-AHAS. Filtration experiments with a high-salinity feed revealed significant improvements in the permeate flux (∼25−40%) and salt rejection (∼10−15%) after the surface modification. Bacterial adhesion studies with two different species, Bacillus subtilis and Pseudomonas aeruginosa, showed significantly reduced cell attachment on the modified membranes. In addition, the coated and quaternized membranes significantly restricted the biological activity and colony formation of both strains with a bacteriostasis rate of ∼75%. The enhanced filtration and antifouling capabilities of the modified membranes were attributed to the presence of polar functionalities (R4N+).
SponsorThe authors thank the Deanship of Scientific Research at KFUPM for providing funding for this work via Project DISC1502. The authors are grateful to Dr. Billel Salhi from the IRC - Membranes & Water Security for the ellipsometry measurements and Hassan Al-Saeed from the Department of Physics for the XPS analysis.
Languageen
PublisherAmerican Chemical Society
Subjectantiadhesion
bacteriostatic
dip-coating
high flux and salt rejection
quaternization
TitleEnhanced Filtration Characteristics and Reduced Bacterial Attachment for Reverse Osmosis Membranes Modified by a Facile Method
TypeArticle
Pagination1136-1144
Issue Number5
Volume Number1
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record