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Effect of Inhibitors on Iron, Copper, and Lead Release in a ChangingWater Environment

机译：在变化的水环境中，抑制剂对铁，铜和铅释放的影响

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Three different finished waters (ground, surface, and reverse osmosis desalinated water)were blended in varying ratios and introduced into a large-scale pilot distribution system(PDS). PVC (6-inch), lined cast iron (6-inch), unlined cast iron (6-inch), and galvanizedsteel (2-inch) aged pipes (40+ years) with accumulated scales were excavated from actualdistribution systems and used to construct the PDS. The PDS was operated continuouslywith a 2-day hydraulic residence time under laminar flow conditions to simulate worst caseconditions. Water was also passed through copper pipes with embedded lead coupons tohydraulically simulate residential systems. Data were collected to assess iron, copper, andlead release with and without inhibitors. Inhibitor addition and pH elevation were found toachieve a significant mitigation of copper and lead release, but only a modest improvementin control of iron.
机译：三种不同的成品水（地下水，地表水和反渗透淡化水） 以不同的比例混合，并引入大规模的试点分配系统 （PDS）。 PVC（6英寸），带衬里的铸铁（6英寸），带衬里的铸铁（6英寸）和镀锌 从实际中挖掘出了累积了水垢的钢制（2英寸）时效管道（40年以上） 分发系统并用于构建PDS。 PDS连续运行 在层流条件下具有2天的水力停留时间以模拟最坏情况 情况。水也通过带有嵌入式铅块的铜管流到 水力模拟住宅系统。收集数据以评估铁，铜和铜 有和没有抑制剂的铅释放。发现抑制剂的添加和pH的升高 大大减轻了铜和铅的释放，但只有适度的改善 控制铁。

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