Influence of different Ag/ZnO heterostructures on the removal efficiency of multidrug-resistant Enterococcus faecium harboring multiple resistance genes from tap water
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Date
2022-05-31
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Abstract
The adsorption efficiency of different Ag/ZnO heterostructures was investigated for the removal of multidrug-resistant Enterococcus faecium (MDR_EF) harboring multiple resistance genes from tap-water. The concentration of the precursors influences the microstructures of the adsorbents; however, it did not significantly affect the adsorption efficiency. The maximum adsorption capacity, qe, (34.11 CFU/g), was obtained for Ag1Zn3.5. The kinetic studies revealed that Ag1Zn1 and Ag1Zn2 adsorbents agreed to the pseudo-first-order kinetic equation and adsorbents Ag2Zn1, Ag3.5Zn1 and Ag1Zn3.5 agreed to the pseudo-second-order kinetic equation. Initial tap-water pH range was beneficial for the adsorption and the pH of the treated tap-water was within the WHO tap water recommendation (6.5–8.5), whereas the effect of ionic strength, anionic and cationic interference was insignificant in the adsorption of MDR_EF onto the different heterostructure. Interestingly, the MDR_EF could retain its cell membrane integrity and resistance genes, suggesting that surface adsorption was the primary mechanism for the removal.
Description
Keywords
adsorption, Ag/ZnO heterostructures, antibiotic resistance bacteria, innersphere complexation
Citation
Anthony TE; Ojemaye O; Okoh OO; Okoh A (2022): Influence of different Ag/ZnO heterostructures on the removal efficiency of multidrug-resistant Enterococcus faecium harboring multiple resistance genes from tap water: Environmental Progress and Sustainable Energy, 10.1002(13925). https://doi.org/10.1002/ep.13925