去除带有羧基官能团的微量阴离子有机酸， 例如通过阴离子交换树脂制备的药物活性化合物（PHAC） 被发现是分子和离子物理吸附的总和 离子交换（九）。性能可以通过应用现有的 IX和吸附平衡理论。例如，当pH值高于7时，双氯芬酸 （DCF，pKa 4.2）完全解离，物理吸附和离子交换 交换在去除电离DCF，即电离靶中起作用 化合物可以被阴离子树脂吸附或离子交换。移除 对布洛芬（IBP）和双氯芬酸（DCF）进行了环境相关的评估 浓度（<100 ng/L）和更高浓度（>10 mg/L）。这些 选择目标化合物进行这项工作是因为它们可以用作 水中痕量阴离子有机化合物的替代物。总体目标 其目的是开发吸附和离子交换组合模型，并评估 树脂用量与微量阴离子去除的关系 存在竞争性阴离子有机化合物的有机化合物 存在于天然有机物（NOM）/废水有机物（EfOM）和 废水中的无机化合物（如硫酸盐）影响饮用水 消息来源。包括表格，数字。

The removal of trace anionic organic acids with carboxylic functional groups, such as pharmaceutically active compounds (PhACs), by anion exchange resins was found to be the sum of the physical adsorption of the molecule plus the ion exchange (IX) of the ion. The performance can be modeled by applying existing IX and adsorption equilibrium theories. For example, at a pH above 7, diclofenac (DCF, pKa 4.2) is completely dissociated and physical adsorption as well as ion exchange play a role in removing the ionized DCF, that is, the ionized target compounds can be adsorbed or ion exchanged by anionic resins. Removal of ibuprofen (IBP) and diclofenac (DCF) were evaluated at environmentally relevant concentrations (< 100 ng/L) and at higher concentrations (> 10 mg/L). These target compounds were selected for this work because they can be used as surrogates for trace anionic organic compounds in water. The overall objective was to develop combined adsorption and ion exchange models and to evaluate the relation between the resin dose needed and the removal of trace anionic organic compounds in the presence of competing anionic organic compounds present in natural organic matter (NOM)/effluent organic matter (EfOM) and inorganic compounds (e.g. sulfate) from wastewater impacted drinking water sources. Includes table, figures.