2006年2月，一个处理无机污染物的新里程碑在 内布拉斯加州麦库克市，利用离子交换联合去除砷， 硝酸盐、铀和总有机碳（TOC）。每天700万加仑（MGD） 饮用水处理厂采用了独特的阴离子交换树脂分层床， 使用简单的盐水再生同时去除所有四种污染物。作为一个 因此，该市预计每年将节省50多万美元的运营成本 与替代处理相比，在电厂的预计20年寿命内 方法。 2004年颁布了一项强制许可令，以使该市的饮用水符合规定 到2006年3月，该市采取了一种快速的方式，放弃了通常的做法 通常需要进行几个月的试点测试。相反，最终的设计 这个概念是使用专有的离子交换模拟软件开发的，该软件允许 该市只需进行为期两周的证明- 在授予 工程合同，全部在五个月内完成。截至2007年10月，该工厂已关闭 成功运营了21个月，符合预算，没有任何重大问题。包括12个参考文献、表格和图表。

In February 2006, a new milestone for treatment of inorganic contaminants was created at the City of McCook, Nebraska, utilizing ion exchange for the joint removal of arsenic, nitrate, uranium and total organic carbon (TOC). The 7 Million Gallon per Day (MGD) drinking water treatment plant employed unique layered beds of anion exchange resins, using simple brine regeneration for simultaneous removal of all four contaminants. As a result, the city is expected to save over half a million dollars per year in operating cost over the projected 20 years life of the plant when compared to alternative treatment approaches. A mandatory consent decree in 2004 to bring the city's drinking water into compliance by March 2006 pushed the city to adopt a fast track approach and to forego the usual several months of pilot testing that would be normally required. Instead, the final design concept was developed using proprietary ion exchange simulation software that allowed the city to conduct just a two-week proof-of-principle pilot before awarding the engineering contract, all within just five months. As of October 2007, the plant had been operating successfully for 21 months, on budget and without any major issues. Includes 12 references, tables, figures.