The effect of molybdenum on biofilm development |
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Authors: | S L Percival |
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Institution: | (1) Microbiology Research Group, Department of Biological Sciences, University College Chester, Parkgate Road, Chester CH1 4BJ, UK, GB |
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Abstract: | Little is known about the formation and effects of biofilms on stainless steel pipes in freshwater environments, particularly
as they are considered as a direct replacement for copper pipes for ‘problem’ water. There is some cause for concern especially
as stainless steel cannot claim the inherent biocidal potential of copper. As molybdenum is known to be leached out of stainless
steel grade 316, in very small amounts, a study was set up to see if molybdenum could retard the development of biofilms.
When a comparison of biofilm viable and total cell counts was made between pure molybdenum metal and stainless steel grade
304, it was found that cell counts were significantly higher (P < 0.05) on grade 304 stainless steel after 5 weeks exposure to flowing water (0.64 m s−1). Molybdenum (above a concentration of 1 g L−1) affected the growth rate of Acinetobacter sp, a pioneering bacterium of biofilms in potable water.
Received 18 February 1998/ Accepted in revised form 17 May 1999 |
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Keywords: | : biofilms stainless steel potable water bacteria molybdenum |
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