Journal
CHEMOSPHERE
Volume 229, Issue -, Pages 1-7Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.04.169
Keywords
S. aureus; Adhesion; Multilayer; Growth inhibition; Zinc ion
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Funding
- Fujian Province Educational and Scientific Research project [JA15398]
- University of Cincinnati through a UNESCO co-Chair Professor position on Water Access and Sustainability
- Herman Schneider Professorship in the College of Engineering and Applied Sciences
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Zinc oxide-coated zeolite (ZOCZ) and zinc oxide (ZnO) were compared in terms of their effectiveness in removing Staphylococcus aureus (S. aureus) from nutrient broth and phosphate-buffered saline (PBS) solution. ZOCZ was found to be extremely efficient in removing S. aureus. ZnO initially was much less effective. Photographs of removal S. aureus from PBS solution with ZOCZ confirmed that a multilayer of S. aureus cells forms on the surface of ZOCZ particles. The comparison of the images of confocal laser scanning microscope and inverted contrast fluorescence microscope further proved that a multilayer of S. aureus cells formed on the surface of ZnO-30N-zeolite. The FESEM images showed that the cell membranes of S. aureus attached to the surface of ZnO-30N-zeolite collapsed. Energy Dispersive X-Ray Spectrum and the atomic absorption spectroscopic analysis confirmed that zinc ions penetrate into S. aureus cells, causing their death. The dead cells were easily removed, allowing ZOCZ to be reused. (C) 2019 Elsevier Ltd. All rights reserved.
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