磁离子交换（MIEX®）已被证明是有效的 降低水中溶解有机碳（DOC）的浓度。 MIEX®是一种高容量离子交换树脂，用作连续介质 在搅拌接触器中加入悬浮液。它的磁性成分 树脂通过聚集颗粒来帮助沉降，以便更快地沉降。在里面 在这项调查中，MIEX®对几种内分泌激素的去除进行了评估 破坏性化学品（EDC）和药品。都是静态台秤 和动态飞行员- 使用科罗拉多河完成了比例测试 水中加入了60多种不同的EDC和药物 包括抗生素、类固醇、阻燃剂、， 止痛药、杀虫剂和x射线造影剂。对于台架试验， MIEX®的剂量为5、10、15和20毫升/升，接触时间为10和20分钟 20分钟。实验室规模的结果表明，一般来说，去除是相关的 至极性（对数Kow），与较低极性（较高 log Kow）。例如，大多数化合物的logkow值都更大 超过3.5%的药物被超过40%的药物清除（即氧苯甲酮、三氯生、， 多环芳烃和一些有机氯农药）。 然而，也注意到了一些例外情况。例如，制药行业 双氯芬酸的对数Kow仅为0.7，但它已被MIEX®清除 (>70%). 双氯芬酸的去除主要是通过离子交换，因为它 在环境pH下以阴离子形式存在。此外，具有良好的剂量响应 获得的曲线表明，去除与MIEX®直接相关 剂量接触时间似乎不如20分钟的接触时间重要 一般来说，去除率仅提高20%或更低。进行了中试规模的试验 以每分钟10加仑的速度进行，以100纳克/升的速度进料 目标化合物。对于中试规模试验，MIEX®剂量为20毫升/升，带有 使用了20分钟的接触时间。试验规模的结果如下: 与实验室规模的结果类似。事实证明，MIEX®的作用有限 用于去除EDC和药物，如大多数化合物 没有被很好地移除。然而，对于特定的化合物和多屏障 过程，MIEX®可能适用。 包括表格、数字。

Magnetic ion-exchange (MIEX®) has been shown to be effective for reducing the concentration of dissolved organic carbon (DOC) from water. MIEX® is a high capacity ion exchange resin that is used as a continuous feed suspension in a stirred contactor. The magnetic component of this resin aids in settling by aggregating particles for more rapid settling. In this investigation, MIEX® was evaluated for removal of several endocrine disrupting chemicals (EDCs) and pharmaceuticals. Both static benchscale and dynamic pilot-scale tests were completed using Colorado River water spiked with over 60 different EDCs and pharmaceuticals, which include compound classes such as antibiotics, steroids, flame-retardants, analgesics, pesticides, and x-ray contrast media. For bench-scale testing, MIEX® was dosed at 5, 10, 15, and 20 mL/L with contact times of 10 and 20 minutes. Bench-scale results show, in general, that removal is related to polarity (log Kow) with higher removal related to lower polarity (higher log Kow). For instance, most compounds with log Kow values greater than 3.5 were removed by greater than 40% (i.e., oxybenzone, triclosan, polycyclic aromatic hydrocarbons, and some organochlorine pesticides). However, some exceptions were noted. For instance, the pharmaceutical diclofenac has a log Kow of only 0.7, yet it was well removed by MIEX® (>70%). The removal of diclofenac is dominated by ion exchange since it exists as an anion at ambient pH. Furthermore, excellent dose response curves were obtained, showing that removal is directly related to MIEX® dose. Contact time seemed to be less important as the 20 minute contact time generally improved removal by only 20% or less. Pilot-scale tests were conducted at 10 gallons per minute with a spike feeding 100 ng/L of the target compounds. For pilot-scale tests, a MIEX® dose of 20 mL/L with a contact time of 20 minutes was utilized. Results from the pilot-scale were similar to results from the bench-scale. MIEX® proved to be of limited use for the removal of EDCs and pharmaceuticals, as most compounds were not well removed. However, for specific compounds and multibarrier processes, MIEX® may be applicable. Includes tables, figures.