Microbiological evaluation of copper: Silver disinfection units for use in swimming pools

L. K. Landeen, M. T. Yahya, S. M. Kutz, Charles P Gerba

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The bactericidal effects of electrolytically generated copper:silver ions on pathogenic bacteria of concern in swimming pools, hot tubs and cooling towers were evaluated in disinfection experiments. Copper:silver ion concentrations generated in well water were 400:40 μg/L, respectively. Pure cultures of Legionella pneumophila, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Streptococcus faecalis, were individually tested in water containing copper:silver ions alone, copper:silver ions with free chlorine, and free chlorine alone. Greater numbers of organisms were killed after exposure to copper:silver ions with 0.2 mg/L free chlorine than in either the copper:silver ions or free chlorine alone. L. pneumophila showed greater than a 5 log10 reduction in numbers after 7 minutes exposure to copper:silver ions with 0.2 mg/L free chlorine. In comparison, less than a 2 log10 decrease was obtained after exposure to free chlorine alone. E. coli numbers decreased over 4 log10 after 1 minute exposure to copper:silver ions with 0.2 mg/L free chlorine and less than a 3 log10 decrease after exposure to free chlorine alone. The majority of the other organisms tested showed the same effect. Electrolytically generated copper:silver ions with low levels of free chlorine appear to have greater bactericidal activities than either disinfectant alone.

Original languageEnglish (US)
Pages (from-to)267-270
Number of pages4
JournalWater Science and Technology
Volume21
Issue number3
StatePublished - 1989

Fingerprint

Swimming pools
Disinfection
disinfection
Chlorine
chlorine
silver
Silver
copper
Copper
ion
Ions
Escherichia coli
evaluation
Disinfectants
Cooling towers
well water
Water
Bacteria
exposure

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Microbiological evaluation of copper : Silver disinfection units for use in swimming pools. / Landeen, L. K.; Yahya, M. T.; Kutz, S. M.; Gerba, Charles P.

In: Water Science and Technology, Vol. 21, No. 3, 1989, p. 267-270.

Research output: Contribution to journalArticle

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