Abstract
The aim of this study was to describe the different aspects of the modification of surface charge of graphene oxide by deposition of Al2O3 nanoparticles on its surface. The novel reduced graphene oxide/Al2O3 nanocomposites were evaluated as an adsorbent for Staphylococcus aureus bacteria cells in electrolyte and drinking water environment. The zeta potential of GO flakes, Al2O3 nanoparticles and RGO/Al2O3 nanocomposite was investigated alone and in the presence of bacteria cells with a special emphasis on the analysis of the zeta potential curves. Our obtained results indicate that the chemical composition of water environment have a significant influence on the electrostatic interactions between sorbent and bacteria. In most cases, the adsorption of bacteria onto adsorbent surface changed its surface charge to similar to adsorbed cells. However, by taking into consideration the sensitiveness and variability of living system such as bacteria cell, we observed that the phenomenon of adsorption (i.e. the physical interactions with sorbent surface) also changed the surface charge of bacteria cells themselves.
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Acknowledgments
The study was accomplished thanks to the funds allotted by the National Science Centre within the framework of the research projects No: UMO-2013/09/D/ST8/04001 and 504P/1090/0856/001. This work has also been supported by the European Union in the framework of European Social Fund through the Warsaw University of Technology Development Programme, realized by Center for Advanced Studies.
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Jastrzebska, A., Karwowska, E., Olszyna, A. (2015). Influence of the Staphylococcus Aureus Bacteria Cells on the Zeta Potential of Graphene Oxide Modified with Alumina Nanoparticles in Electrolyte and Drinking Water Environment. In: Oral, A., Bahsi Oral, Z., Ozer, M. (eds) 2nd International Congress on Energy Efficiency and Energy Related Materials (ENEFM2014). Springer Proceedings in Energy. Springer, Cham. https://doi.org/10.1007/978-3-319-16901-9_30
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