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Impact of the Change in Disinfectant on Lead, Brass, and Copper Components in the Distribution System 消毒剂的变化对配电系统中铅、黄铜和铜组件的影响
发布日期: 2007-06-01
越来越多的公用事业公司使用氯胺代替游离氯,因为氯胺的毒性更大 稳定性更好地符合总大肠菌群规则和更严格的 消毒剂/消毒副产品规则的要求。关于 消毒剂引起的氧化还原电位(ORP)、铅化学和氧化皮的变化 形成和与天然有机物的相互作用有助于加深理解 影响腐蚀加剧和金属释放的因素中,有哪些与温度变化有关 消毒剂本文简要概述了Pb(IV)应用的理论考虑 在分配系统中释放金属。此外,本文还提供了初步数据和建议 基于对现场信息的了解和正在进行的研究 配电系统中铅、黄铜和铜组件的消毒剂变化。后果 这项研究将对正在考虑将游离氯转化为有机氯的公用事业公司产生兴趣 氯胺,和/或与保持同时遵守铅相关的公用设施 铜规则和第二阶段D/DBPR。包括29篇参考文献、图表。
More and more utilities are using chloramines in place of free chlorine because of their greater stability for better compliance with both the Total Coliform Rule and more stringent requirements of the Disinfectants/Disinfection Byproducts Rule. New information about disinfectant-induced changes in oxidation reduction potential (ORP), lead chemistry, scale formation and interactions with natural organic matter have contributed to greater understanding of the factors influencing increased corrosion and metals release associated with a change in disinfectant. This paper provides a brief overview of Pb(IV) theoretical considerations as applied to metals release in the distribution system. In addition, this paper provides preliminary data and information based on ongoing laboratory and field studies aimed at understanding the impact of a change in disinfectant on lead, brass, and copper components in the distribution system. Results from this study will be of interest to utilities that are considering converting from free chlorine to chloramines, and/or utilities concerned with maintaining simultaneous compliance with the Lead and Copper Rule and the Stage 2 D/DBPR. Includes 29 references, figures.
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发布单位或类别: 美国-美国给水工程协会
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