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首页> 外文期刊>Journal of Environmental Science and Health >Inactivation of Pseudomonas aeruginosa and Aeromonas hydrophila by silver in tap water
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Inactivation of Pseudomonas aeruginosa and Aeromonas hydrophila by silver in tap water

机译：银在自来水中灭活铜绿假单胞菌和嗜水气单胞菌

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摘要

This study was conducted to assess the efficacy of silver as a secondary disinfectant to replace or reduce the level of chlorine utilized in water distribution systems. Pseudomonas aeruginosa and Aeromonas hydrophila are opportunistic pathogens present in drinking water and have been associated with waterborne disease. After 8 hours of exposure to 100 μg/L of silver, there was a ＞ 6-log_(10) reduction in P. aeruginosa in tap water at room temperature at pH7 and a 5.55-log_(10) reduction in the presence of 3 mg/L humic acid. Similar reductions were observed at pH9. At 4℃, reductions greater than 4-log_(10) were observed after 24 hours. For A. hydrophila, a ＞ 6-log_(10) reduction occurred at both pH7 and pH9 within nine hours. The World Health Organization has determined that this amount of silver could be used for water disinfection without health risks. Furthermore, silver shows promise as a secondary disinfectant, even in the presence of organic matter in concentrations that would reduce the effectiveness of free chlorine.
机译：进行这项研究是为了评估银作为次要消毒剂的功效，以代替或降低水分配系统中使用的氯含量。铜绿假单胞菌和嗜水气单胞菌是饮用水中存在的机会病原体，并与水传播疾病有关。暴露于100μg/ L的银8小时后，室温下pH7的自来水中铜绿假单胞菌的含量降低了> 6-log_（10），而在3存在下，铜绿假单胞菌的含量降低了5.55-log_（10）。毫克/升腐殖酸。在pH9下观察到类似的降低。在4℃下，在24小时后观察到大于4-log_（10）的降低。对于嗜水曲霉，在9小时内在pH7和pH9时均发生＞ 6 log_（10）的降低。世界卫生组织已确定该银量可用于水消毒，而不会造成健康风险。此外，即使在有机物浓度降低了游离氯的有效性的情况下，银也有望作为二次消毒剂。

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