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Title: Development of silver and zinc oxide decorated nanoclay containing polymeric composites for water disinfection applications

Contaminated drinking water has serious implications to the human health that could lead to death. The rapid growth of bacterial contamination in drinking water is alarming, and yet a robust and cost effective method with less limitation has not been developed. The current study is aimed at evaluating the performance of nanoclay composites dispersed in chitosan biopolymer as an antibacterial material. The performances of the composites were evaluated using the batch kinetic studies. Three composites of Ag-CtsB, ZnO-CtsB and Ag/ZnO-CtsB were prepared and evaluated against gram negative Escherichia coli and gram positive Enterococcus faecalis bacteria. The composites were characterized by powder X-ray diffraction, scanning electron microscope, energy dispersive spectroscopy and BET surface area measurements. Antibacterial activity results showed that the composites can be a potent bactericide material for water disinfection as they are highly effective against both gram negative and gram positive bacteria tested. Whereas both Ag-CtsB and ZnO-CtsB composites showed good antibacterial activity against bacteria with removal efficiency from 51%, best antibacterial activity was observed with Ag/ZnO-CtsB composite with removal efficiency from 78%. The results revealed that Ag/ZnO-CtsB composite is a promising bactericide that is highly effective against both gram negative and gram positive bacteria tested.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4]
  1. DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria, 0001 (South Africa)
  2. (South Africa)
  3. Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, 0001 (South Africa)
  4. Department of Environmental, Water and Earth Sciences, Tshwane University of Technology, Arcadia Campus, 0001 Pretoria (South Africa)
Publication Date:
OSTI Identifier:
22391861
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1664; Journal Issue: 1; Conference: PPS-30: 30. International Conference of the Polymer Processing Society, Cleveland, OH (United States), 6-12 Jun 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; AMINO ACIDS; COMPOSITE MATERIALS; DRINKING WATER; ESCHERICHIA COLI; NANOMATERIALS; OLIGOSACCHARIDES; POWDERS; SCANNING ELECTRON MICROSCOPY; SILVER; STERILIZATION; SURFACE AREA; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY; ZINC OXIDES