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Silver-embedded granular activated carbon as an antibacterial medium for water purification

DSpace at IIT Bombay

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Title Silver-embedded granular activated carbon as an antibacterial medium for water purification
 
Creator BANDYOPADHYAYA, R
SIVAIAH, MV
SHANKAR, PA
 
Subject nanoparticles
silver
granular activated carbon
escherichia coli
antibacterial
 
Description Silver (Ag) particle embedded granular activated carbon (GAC) was made for the first time to assess its ability in inhibiting the growth of Escherichia coli (E. coli), a water-borne bacterial pathogen. Ag-GAC was made by impregnating GAC with AgNO3 and then reducing it to metallic Ag. Plate assay showed slight inhibition of E. coli, even with Ag-GAC prepared from 0.005 mol L-1 AgNO3, but this and shake flask tests showed a conspicuous effect only for higher concentrations of 0.1-1 mol L-1 AgNO3. Flow tests further indicated that Ag-GAC made from 1.0 mol L-1 AgNO3 caused a desirable three orders of reduction in E. coli number concentration in less than 30 s. An optimum of 9-10.5 wt% of embedded Ag in the final Ag-GAC product was necessary for the requisite complete inhibition of E. coli, killing bacteria in the contact-mode for up to 350 L of flowing water. These results prove that Ag-GAC possesses antibacterial properties and can be used for disinfection to produce potable quality water. (C) 2008 Society of Chemical Industry.
 
Publisher JOHN WILEY & SONS LTD
 
Date 2011-08-17T00:38:05Z
2011-12-26T12:55:14Z
2011-12-27T05:43:57Z
2011-08-17T00:38:05Z
2011-12-26T12:55:14Z
2011-12-27T05:43:57Z
2008
 
Type Article
 
Identifier JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, 83(8), 1177-1180
0268-2575
http://dx.doi.org/10.1002/jctb.1985
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9682
http://hdl.handle.net/10054/9682
 
Language en