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Water Lecture 3 A. Disinfection B. Water Safety Plans - page 6 / 47

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Summary Properties Physical Disinfectants

UV radiation

low pressure mercury lamp: low intensity; monochromatic at 254 nm

medium pressure mercury lamp: higher intensity; polychromatic 220-280 nm)

reacts primarily with nucleic acids: pyrimidine dimers and other alterations

Boiling: efficient kill; no residual protection; fuel/environmental costs

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