This study investigated the control of trihalomethanes (THMs) with ion exchange by comparing the THM formation potentials of the organic fractions in the influent to three column systems. The results showed that the smallest organic fraction, <0.5 K apparent molecular weight (AMW), was most reactive with free available chlorine. With the ion exchange system, the 1--5K-, 0.5K--1K-, and < 0.5-AMW organic fractions produced the majority of THMs, whereas with the granular activated carbon (GAC) and the combined ion exchange-GAC systems, the <0.5-AMW fraction produced most of the THMs. The authors conclude that regeneration of the resin of the ion exchange column at sulfate breakthrough, in combination with a GAC column, will produce a water very low in THM formation potential.

中文翻译：

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使用阴离子交换树脂去除THM前体。

这项研究通过比较三塔系统进水中有机馏分的THM形成潜能，研究了用离子交换控制三卤甲烷（THM）的方法。结果表明，最小的有机组分，<0.5 K表观分子量（AMW），与游离有效氯最具反应性。使用离子交换系统时，1--5K-，0.5K--1K-和<0.5-AMW有机馏分产生了大部分THM，而使用颗粒活性炭（GAC）和组合的离子交换GAC系统，<0.5-AMW分数产生了大多数THM。作者得出的结论是，硫酸盐突破时离子交换柱树脂的再生，与GAC柱结合，将产生水，THM的形成潜力非常低。