Performance of Layer-by-Layer-Modified Multibore ® Ultrafiltration Capillary Membranes for Salt Retention and Removal of Antibiotic Resistance Genes

Polyether sulfone Multibore ultrafiltration membranes were modified using polyelectrolyte multilayers via the layer-by-layer (LbL) technique in order to increase their rejection capabilities towards salts and antibiotic resistance genes. The modified capillary membranes were characterized to exhibit...

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Bibliographic Details
Published in:Membranes (Basel) 2020-12, Vol.10 (12), p.398
Main Authors: Niestroj-Pahl, Robert, Stelmaszyk, Lara, ElSherbiny, Ibrahim M A, Abuelgasim, Hussein, Krug, Michaela, Staaks, Christian, Birkholz, Greta, Horn, Harald, Li, Tian, Dong, Bingzhi, Dähne, Lars, Tiehm, Andreas, Panglisch, Stefan
Format: Article
Language:English
Subjects:
Acidic oxides
Antibiotic resistance
antibiotic resistance genes
Antibiotics
Automation
Backwash
Calcium chloride
Deoxyribonucleic acid
DNA
Drinking water
Drug resistance
Experiments
Genes
Inorganic salts
Laboratory tests
layer-by-layer technique
Magnesium sulfate
membrane cleaning
Membranes
Molecular weight
Multilayers
Oxidation
Permeability
Polyelectrolytes
polymeric membranes
Regeneration
Rejection
Retention
salt retention
Salts
Sodium chloride
Ultrafiltration
Velocity
Water treatment
Zeta potential
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Summary:Polyether sulfone Multibore ultrafiltration membranes were modified using polyelectrolyte multilayers via the layer-by-layer (LbL) technique in order to increase their rejection capabilities towards salts and antibiotic resistance genes. The modified capillary membranes were characterized to exhibit a molecular weight cut-off (at 90% rejection) of 384 Da. The zeta-potential at pH 7 was -40 mV. Laboratory tests using single-fiber modified membrane modules were performed to evaluate the removal of antibiotic resistance genes; the LbL-coated membranes were able to completely retain DNA fragments from 90 to 1500 nt in length. Furthermore, the pure water permeability and the retention of single inorganic salts, MgSO , CaCl and NaCl, were measured using a mini-plant testing unit. The modified membranes had a retention of 80% toward MgSO and CaCl salts, and 23% in case of NaCl. The modified membranes were also found to be stable against mechanical backwashing (up to 80 LMH) and chemical regeneration (in acidic conditions and basic/oxidizing conditions).
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes10120398