Premium
Antimicrobial action and efficiency of silver‐loaded zeolite X
Author(s) -
KwakyeAwuah Bright,
Williams C.,
Kenward M.A.,
Radecka I.
Publication year - 2008
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/j.1365-2672.2007.03673.x
Subject(s) - antimicrobial , zeolite , action (physics) , microbiology and biotechnology , chemistry , biology , biochemistry , physics , catalysis , quantum mechanics
Abstract Aims: To synthesize silver‐loaded zeolite X and establish the extent to which it persist in its antimicrobial action against strains of Escherichia coli K12W‐T, Pseudomonas aeruginosa NCIMB8295 and Staphylococcus aureus NCIMB6571. Methods and Results: The antimicrobial action and efficacy of silver‐loaded zeolite X on Escherichia coli , Staphylococcus aureus and Pseudomonas aeruginosa were investigated. Zeolite X was synthesized and loaded with Ag + by ion exchange. This resulted in 2·0% (w/w) loading of Ag + in the zeolite framework and 5·8% (w/w) on the zeolite. Escherichia coli and Pseudomonas aeruginosa and Staphylococcus aureus suspended in tryptone soya broth were exposed to 0·15, 0·25, 0·5 or 1·0 g l −1 of silver‐loaded zeolite X for a period up to 24 h. No viable cells were detected for any of the three micro‐organisms within 1 h. Silver‐loaded zeolite X, retrieved three times from the first exposure cultures, was washed with de‐ionized water and added to fresh bacterial suspensions. The results showed that the silver‐loaded zeolite X retained its antimicrobial action. Conclusions: Silver‐loaded zeolite X persisted in its antimicrobial action against all three micro‐organisms. Significance and Impact of the study: The results are significant for the longevity of antimicrobial action of silver‐loaded zeolite X.