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المؤلفNnadiekwe, Chidera C.
المؤلفAbdulazeez, Ismail
المؤلفMatin, Asif
المؤلفKhaled, Mazen M.
المؤلفKhan, Majad
المؤلفAnand, Deepak
المؤلفAhmad, Irshad
تاريخ الإتاحة2023-05-17T08:14:48Z
تاريخ النشر2021-05-14
اسم المنشورACS ES and T Water
المعرّفhttp://dx.doi.org/10.1021/acsestwater.0c00168
الاقتباسNnadiekwe, 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.‏
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85121712953&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/42837
الملخصIn 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+).
راعي المشروعThe 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.
اللغةen
الناشرAmerican Chemical Society
الموضوعantiadhesion
bacteriostatic
dip-coating
high flux and salt rejection
quaternization
العنوانEnhanced Filtration Characteristics and Reduced Bacterial Attachment for Reverse Osmosis Membranes Modified by a Facile Method
النوعArticle
الصفحات1136-1144
رقم العدد5
رقم المجلد1
dc.accessType Abstract Only


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