Journal
APPLIED SURFACE SCIENCE
Volume 266, Issue -, Pages 280-287Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2012.11.168
Keywords
Silica beads; Silver nanoparticles; Water disinfection; Antibacterial material
Categories
Funding
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Republic of Korea
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The shortage of safe drinking water in developing countries and at the sites of natural disaster has spurred scientists to develop more effective materials for water disinfection at the point of use. In the present study, silver nanoparticle supported silica beads (Ag-NPBs) with sizes ranging from 0.5 to 1 mm were prepared, and their potential for water disinfection was examined. Escherichia coli was utilized to assess water disinfection potential by flow tests using a filter column filled with Ag-NPBs. Ag-NPBs inactivated > 99% of E. coli with a contact time of several seconds when the input water had a bacterial load of approximately 10(6) colony-forming units per mL. Ag-NPBs have an antibacterial capacity of 4.5 L/g. The effect of ammonium and urea on the release rate of silver into filtrate was investigated. The results suggest that Ag-NPBs could be an effective material for water disinfection. (c) 2012 Elsevier B.V. All rights reserved.
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