对阴离子交换树脂进行了评估，以确定从常规处理水中去除天然有机物（NOM）的性能特征。研究表明，测试的阴离子树脂有效地去除了佛罗里达州南部石灰软化水中的NOM，并将颜色级别从17个颜色单位降低到不到3个颜色单位。具体而言，阴离子交换树脂可有效去除1K-10K和大于10K分子量组分中的有机物，而不是小于1K的组分。在负载率为2.75 gpm/ft3（EBCT 2.7分钟）时，在103000床体积（30个循环）后，未观察到树脂性能的显著退化。根据收集的废再生剂水质数据，当用反冲洗水稀释时，再生剂将通过市政下水道系统进行处理。然而，废弃再生剂的处置必须根据现场具体情况进行调查，因为不同的条件可能会显著影响处置方法和成本。 在本研究的条件下，将阴离子交换工艺添加到现有的石灰软化处理设施中，以去除颜色和NOM，成本效益高。

Anion exchange resins were evaluated to determine performance characteristics for removing natural organic matter (NOM) from conventionally treated water. The study shows that the tested anion resin effectively removed NOM from lime softened water in south Florida and reduced color levels from 17 to less than 3 color units. Specifically, the anion exchanged resin effectively removed organics in the 1K-10K and greater than 10K molecular weight fractions, rather than less than 1K fraction. No significant degradation in resin performance was observed after 103,000 bed volume (30 cycles) at a loading rate of 2.75 gpm/ft3 (EBCT 2.7 minutes). Based on data collected for spent regenerant water quality, disposal of the regenerant will occur through the municipal sewer system when diluted with backwash water. Disposal of spent regenerant, however, must be investigated on a site-specific basis, as varying conditions can significantly impact the method and cost of disposal. Under the conditions of this study, the anion exchange process is cost effective when added to the existing lime softening treatment facility for color and NOM removal.