Mutagenicity of extracts of lake drinking water treated with different disinfectants in bacterial and plant tests

摘要: Abstract Raw water and drinking samples collected from five treatment plants supplied by a northern Italian lake in two periods of the year (summer winter) were studied for their mutagenicity. The concentrated on silica C 18 cartridges adsorbates tested at increasing doses with bacterial short-term mutagenicity test (Ames Salmonella typhimurium TA98 TA100 strains), which reveals gene-mutation-inducing ability pollutants, plant genotoxicity bioassay ( Tradescantia /micronucleus test), determines clastogenicity (chromosome-breaking ability). all found to contain direct-acting mutagens detectable mainly strain. analyses after showed some interesting results: was reduced when ozone used together chlorine dioxide, but increased, though only summer sample; both strains always dioxide disinfection; contrary, using NaClO winter increased. induced high number micronuclei test, showing strong clastogenicity. This activity higher NaClO-treated samples, lower other disinfectants. Therefore, disinfection and/or seems be suitable alternative use controlling formation nonvolatile mutagens. concentration method coupled tests simple, rapid relatively inexpensive system monitoring studying influence different systems